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FishSAFE Website Terms and Conditions

Terms and Conditions - FishSafe Website This website, www.fishsafe.org and any associated sites, ("the Site") is provided to you ("you" meaning any person, firm, partnership, corporate body or any other legal person accessing or otherwise using, or benefitting from the use of, this Site) by FLTC Services Limited, a company incorporated under the Companies Acts (Registered No. SC348751) and havin...

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FishSAFE Unit Terms and Conditions

Terms and Conditions of Supply, Use and Maintenance of the FishSAFE Unit and Related Database Introduction These are the Terms and Conditions which govern the supply, use and maintenance of FishSAFE Units and the initial provision of (and subsequent updating of) the Data and Database associated with such Units.  We are FLTC Services Limited ("FLTCS") a not-for-profit organisation incorporated u...

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Terms & Conditions

Please select from the two choices below, to either read the terms and conditions for the FishSafe website or the FishSafe alarm unit: FishSafe Website FishSafe Alarm Unit  

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Useful Links

Oil & Gas UK Ltd               FLTC Services Limited               Scottish Fishermen's Federation               National Federation of Fishermen's Organisation               Kingfisher Information Services  

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Funding

Fishing Safely in Changing European Waters 2016-2019 Provision of FishSAFE Information, the Kingisher Fortnightly Bulletin and the Yellow Card, development of new terminology and symbology for oil and gas hazards during and after decommissioning and provision of enhanced images of such hazards form part of the project. It incorporates a review of criteria to include a pipeline span in Fish...

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Feedback

If you have some feedback to offer, or have a question you would like to ask, please complete the form below and we will contact you as soon as possible.

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About Us

The FishSAFE web site has been developed by FLTC Services Limited ("FLTCS") to promote fishermen's awareness of offshore surface and subsea structures within the UK Continental Shelf. FLTCS was formed to promote or supply information systems and devices which enhance safety in connection with oil and gas infrastructure in UK Waters. The parent company of FLTCS was formed by Oil and Gas UK, the ...

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Repair and Maintenance Procedure

If you have any issues with your FishSAFE unit relating to repairs or maintenance, please follow the procedures outlined below. Repairs during Warranty Period of Three Years A repair service is available to remedy any defect which may arise through ordinary use of the unit within three years from the date on which the units were delivered to FLTC Services Limited by the manufacturer. This ap...

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Data Updates

The update process differs depending which FishSAFE Unit you have installed on your vessel. For FishSAFE version 2 units (available from 2009-2019)  Please download the latest file from the download page, unzip and copy the *.dat file to an SD card before inserting into your FishSAFE unit   For FishSAFE version 3 units (available from summer 2020 - )  Providing your unit ...

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Use of the FishSAFE Unit

Please click here for the FishSAFE Unit Operation Manual (Opens in PDF Format). Within this document, there is information relating to: Installation FishSAFE overview Operating procedures Visual and audible alarms Updating the unit Unit repairs For information relating to the prcedure for any repair and maintenance of the FishSAFE unit, pl...

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How to buy a FishSAFE Unit

How to purchase a FishSAFE Unit Please click here to download the FishSAFE Unit Purchase Order Form. This Order Form is in Adobe PDF format. Print off the downloaded form and complete the details where requested. You can email the form to us at accounts@sff.co.uk or post the form to FLTC Services Limited, 24 Rubislaw Terrace, Aberdeen AB10 1XE. Once we receive the form and accept y...

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Latest FishSAFE News

FLTC Services Limited (FLTCS) is pleased to announce that the upgraded FishSAFE units (Mark 3) are hoped to be available later this year. This unit incorporates innovative features such as a touch screen, tracker ball facility and updating and messaging online among others. It has already proved popular in sea trials with skippers appreciating its benefits compared with previous versions. Grant...

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Glossary

Abandon To cease work on a well which is non-productive, to plug off the well with cement plugs and salvage all recoverable equipment . Also used in the context of field abandonment. Appraisal Well A well drilled as part of an appraisal drilling programme which is carried out to determine the physical extent, reserves and likely production rate of a field. Associated Gas Natural...

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Seismic Surveys

Seismic surveys are carried out extensively in the North Sea to search for potential reserves of oil and gas in the subsea rock formations. Large seismic survey vessels are used to tow steamers suspended below the surface which carry hydrophones. Sound waves are transmitted from the vessel using compressed air guns which travel down through the seabed and reflect back from the different layers of...

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Moorings

Offshore mooring buoys are commonly used on the UK Continental Shelf. A Single Point Mooring buoy (SPM) as seen on the right, is used by a shuttle tanker to secure to during loading/unloading operations. The buoy is attached to the subsea facility by flexible risers and is held in place by anchors and should be given a wide berth at all times. The images below show different moori...

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Pipelines

As stated on admiralty charts "Mariners are advised not to anchor or trawl in the vicinity of pipelines". The note goes on to say that damage to oil or gas pipelines could cause your vessel to lose buoyancy through escaping gas. Seabed conditions such as sand waves can create spans on pipelines which fishing gear can become snagged under and put your vessel in severe danger. Pipelines are used ...

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Subsea Templates & Manifolds

Templates A subsea template is a large steel structure which is used as a base for various subsea structures such as wells and subsea trees and manifolds. The image below shows a number of wellheads on a subsea template: The wellheads can be seen with their guidebases (4 x white rods) pertruding from each corner, which are used to locate other equipment, i.e. trees. The size of a templ...

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Surface Structures

Platforms, FPSOs, Drilling and Semi Submersible Rigs Alwyn North Platform FPSO whist off-loading Jack Up Drilling Rig Semi Submersible Drilling Rig   Platforms Most production platforms are placed directly above the wells from which they are extracting oil or gas. The visible topsides a...

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Contact us

The FishSAFE website is managed by Kingfisher Information Services on behalf of FLTC Services Limited. If you have a query, comment, or suggestion in relation to this website or the FishSAFE Unit, please contact Kingfisher or complete the form within the Feedback section of this website.   Kingfisher contact details: Kingfisher Information Services Sea Fish Industry Authority ...

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FishSafe Unit

Product Information For 10 years the original FishSAFE unit has been protecting fishing boat skippers in the North Sea, warning them of approaching hazards and clearly displaying where surface and subsea structures are located. The new and much improved FishSAFE unit is now available for supply. With many components of the original FishSAFE now becoming obsolete, FLTC Services Limited ha...

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Subsea Trees

Subsea trees are structures attached to the top of subsea wells to control the flow of oil / gas to or from a well. When attached to a subsea well the combined structures can extend to 7 metres above the seabed in height. They are made up of pipework and valves within a supporting steel framework and present a substantial hazard to towed fishing gear. When several subsea trees and asso...

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Subsea Wellheads

Production Wells When a well is drilled the structure placed on the seabed is called a wellhead. There may be a single wellhead, though often there may be several units grouped together to form a block. Attached to the top of the wellhead are the control units called subsea trees. The wellhead assembly is usually contained within a supporting structure called a template, with many...

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Subsea Structures

Subsea Structures The recovery of oil and gas from the subsea environment involves the use of many  seabed structures. These seabed structures present snagging dangers to the fishing community. Many subsea structures are protected by safety zones, though others do not have the benefit of safety zones and therefore, it is vital that their positions are known. The positions of all subsea st...

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Offshore Structures

There are many different types of structures associated with the offshore oil and gas industry on the UK Continental Shelf. Oil platforms and drilling rigs are easily visible but below the surface there are many more structures which if not avoided may become serious hazards to fishing operations.

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Subsea Safety Zones

Not all structures associated with the offshore oil and gas industry indicate their presence at the surface. For those subsea structures requiring a safety zone, a Statutory Instrument (S.I.) will be created to offer protection to / from other users of the sea. Subsea structures form a major part of the offshore oil and gas infrastructure on the UK Continental Shelf. These structures c...

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Surface Safety Zones

Offshore operators are keen to get the message across to fishermen working in and around offshore installations that safety zones are present for the protection of all parties and they must not be entered at anytime during fishing operations.

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Safety Zones

UK Continental Shelf Safety Zones Offshore operators are becoming increasingly concerned for the safety of their assets and the fishermen working around them. Recently there have been many incidents where fishing vessels have entered safety zones whilst carrying out fishing operations and several of these incidents have resulted in serious damage to subsea equipment and more seriously have put at...

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News

Dropped steel cage/basket (West of Shetland)

A steel cage has been dropped from a fishing vessel following snagging and partial recovery. The cage is metal in construction and appears to be from the oil & gas industry. Dimensions: 1.7m x 1.7m x 1.6m (height). Weight: 132kg (in water); 575kg (in air)

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Brae Bravo Decommissioninig

Decommissioning and removal of the Brae Bravo Platform will be undertaken throughout 2021. Removal of topside modules and flare bridge will be undertaken ahead of removal of the main jacket in 2022.

Decommissioning and removal of the Brae Bravo Platform will be undetaken throughout 2021. Removal of topside modules and flare bridge will be undertaken ahead of removal of the main jacket in 2022.

 

Vessels will be operating near to and within the 500m safety zone as indicated.

 

Thialf

The Thialf will be alsongside the Brae Bravo platform between the 15th of April 2021 and the 24th of May 2021.

 

Bylgia

The Bylgia will enter the worksite between the 1st of May 2021 and 3rd of may 2021.

 

Sleipnir

The Sleipnir will be alsongside the Brae Bravo platform between the 15th of April 2021 and the 24th of May 2021. The Sleipnir will then return to the field to continue removal works circa 15th July2021.

 

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Seismic 2D Survey - RDI21 - MCG21001 (April to mid-May operations)

GeoexMCG will be acquiring the 'Regional Deep Imaging Project 2021' (RDI21) between April 15th and September 30th, 2021. The survey is a cross border 2D seismic survey in Norway, UK, Faroe Islands and Denmark.

The aim of the survey is to image deep seated crustal structures in the North Sea and a single source of 6,270 cu.in and one cable of 12 km length towed at 15-30m depth (slant) will be used. The survey will be carried out by the seismic vessel M/V Akademik Lazarev (UAJS) and Jan van Gent (YJVF4) will be the support vessel.

 

There will be two FLOs onboard, one Norwegian from Geograf Maritime and one from SFF Service Limited (Scottish Fishermen's Federation). In addition, the vessel will have MMO and PAM operators onboard.

 

Since RDI21 is a very regional survey, there will be some flexibility in deviating from the preplotted survey lines, if needed.  

 

The survey has been divided into several notices where each notice contains the lines that are planned to be acquired within the time frame specified in the heading. The .png map shows the full RDI21 2D survey outline.

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Buzzard Field - Pipeline bundle tow and installation

A pipeline bundle will be launched, towed to and installed in the Buzzard field.

A pipeline bundle will be transported using the Off Bottom Tow Mode (OBTM) and Controlled Depth Tow Method (CDTM). The bundle will be launched from Sinclair's Bay North of Wick and towed to the installation area suspended between one or more lead tugs and a trail tug and accompanied by a guard vessel and ROV support vessel.

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Construction of Wind Farm (Triton Knoll)

Activities are continuing related to the development of the Triton Knoll wind farm, as detailed below. For background information visit: http://www.tritonknoll.co.uk/

Mariners are advised of the following vessels commencing operations at the Triton Knoll Offshore Wind Farm as outlined below:

 

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Margaret Mary Guard Vessel MGNM6 232025575 N/A Grimsby 12/04/2021
Seacat Enterprise Crew Transfer Vessel MAPS9 232006483 N/A Grimsby 24/02/2021

 

Mariners are advised of the offshore construction status at the Triton Knoll Offshore Wind Farm:

 

The following vessels continue to be active at the Triton Knoll as outlined within previously issued NtM's 

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Seacat Intrepid

Crew Transfer

2HWU6

235107284

N/A

Grimsby

02/01/2020

Esvagt Froude

Service Operations Vessel

OWWN2

219590000

9703461

Grimsby

02/02/2020

Esvagt Wind 1

High Speed Craft

XPE6305

219019815

N/A

Esvagt Froude

02/02/2020

Seacat Courageous

Crew Transfer Vessel

2IDC8

235108711

N/A

Grimsby

25/04/2020

Normand Fortress Service Operations Vessel LIKW3 258537000 9371218 Grimsby 15/03/2021
Windcat 11 Crew Transfer Vessel 2BIS9 235066459 N/A Grimsby 14/12/2020
World Mistral Crew Transfer Vessel OWJT2 219018009 9681302 Grimsby 01/03/2021
Pacific (Wind) Osprey Wind Turbine Installation Vessel 5BUF3 210286000 9621704 Able Seaton 10/01/2021
Acta Orion Service Operations Vessel PCEN 244830883 9750268 Immingham 15/01/2021
HST Euan Crew Transfer Vessel MGQO3 232025959 9883974 Grimsby 15/01/2021
Stril Server Service Operations Vessel LARP7 258873000 9665047 Grimsby 15/01/2021
Afon Las Buoyage Maintenance Vessel 2JEM8 235115261 9547398 Hull 01/04/2021
Afon Cefni Buoyage Maintenance Vessel 2FYX2 235095403 9258181 Hull 01/04/2021
Dalby Ouse Crew Transfer Vessel 2JPV2 235117937 N/A Grimsby 12/04/2021

 

Construction activities carried out over the previous 7 Days:

  • Ongoing activities at Offshore Sub Station Platforms East & West continues.
  • Ongoing activities at Offshore foundations continues.
  • Wind Turbine Generator Installation & Commissioning continues infield (16 WTG's currently installed).

Construction Activities planned for the next 7 days:

  • Ongoing activities at Offshore Sub Station Platforms East & West continues.
  • Ongoing activities at Offshore foundations continues.
  • Wind Turbine Generator Installation & Commissioning continues infield.
  • Expected arrival of Operations & Maintenance Crew Transfer Vessel – Windcat 11
  • Expected arrival of Commissioning Crew Transfer Vessel - World Mistral
  • Expected to commence infield Met Ocean Buoy Maintenance
  • Expected arrival of infield Guard Vessel Margaret Mary

*** Note ***

 

Application of Triton Knoll Wind Farm Safety Zones During Construction

The Secretary of State has granted the Application of Safety Zones on the Triton Knoll Wind Farm Project as follows:

  • 500m “rolling” safety zones around any structure where construction is being undertaken (as indicated by the presence of construction vessels).
  • 50m pre-commissioning safety zones surrounding partial structures or completed structures prior to commissioning.

 

Demarcation Buoys

Partrac Ltd have deployed x12 Demarcation Buoys and x2 Metocean Buoy at the Triton Knoll Offshore Wind Farm (TKOWF) to mark the perimeter of the TKOWF site boundaries.

 

Vessels are requested to leave a wide berth during the installation operations. The buoys will be deployed for a period of two years, and all equipment will be removed at the end of the installation.

 

Buoy

Structure

Latitude

Longitude

Individual Specification

TK01

South Cardinal

53°24.054'N

000°57.935'E

Pillar shaped with a south cardinal shaped top mark, exhibiting a Q (6) + L Fl 15s light character (5 nm nominal light range)  RECOVERED

TK02

Special Mark

53°24.568'N

000°54.433'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK03

Special Mark

53°26.132'N

000°50.008'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK04

Special Mark

53°27.457'N

000°45.927'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK05

South Cardinal

53°28.859'N

000°41.181'E

Pillar shaped with a south cardinal shaped top mark, exhibiting a VQ (6) + L Fl 10s light character (5 nm nominal light range)   RECOVERED

TK06

Special Mark

53°30.807'N

000°41.826'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK07

North Cardinal

53°32.196'N

000°44.248'E

Pillar shaped with a north cardinal shaped top mark, exhibiting a Very Quick (VQ) light character (5 nm nominal light range)

TK08

Special Mark

53°32.444'N

000°47.678'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range

TK09

North Cardinal

53°32.428'N

000°52.040'E

Pillar shaped with a north cardinal shaped top mark, exhibiting a Q light character (5 nm nominal light range)

TK10

Special Mark

53°29.595'N

000°55.306'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5 second (s) light character (5 nm nominal light range)

TK11

Special Mark

53°26.979'N

000°57.974'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK12

East Cardinal

53°24.368'N

001°00.228'E

Pillar shaped with an east cardinal shaped top mark, exhibiting a Q (3) 10s light character (5nm nominal light range)

TK13

Metocean Buoy

53°26.002'N

000°55.091'E

Triaxys metocean wave and current buoy (South) exhibiting a Fl (5) Y 20s light character (3 nm nominal light range)

TK14

Metocean Buoy

53°30.581'N

000°47.944'E

Triaxys metocean wave and current buoy (North) exhibiting a Fl (5) Y 20s light character (3 nm nominal light range)

 

Mariners are advised that all foundations monopiles have been installed and all inter-array and export cables have been installed, buried and need to be assumed as energised / live at all times.

 

Local Notice to Mariners Recently

NtM 001-2021 (05th January 2021)

NtM 002-2021 (20th January 2021)

NtM 003-2021 (17th March 2021)

NtM 004-2021 (24th March 2021)

NtM 005-2021 (06th April 2021)

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Survey - Glengorm South Appraisal Well VSP (Ref: 1134)

A 2 day Geological Glengorm South Appraisal Well VSP from the drilling Rig from 16th April 2021.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

CNOOC Petroleum Europe Limited

N/A

2m

5m

16/04/2020

For 2 Days

22

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Power Cable Replacement Operations - Forties Field

Power Cable Replacement Operations between Forties Alpha Satellite Platform to Forties Echo Platform (MV Normand Cutter) mob date 19th April 2021

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Penguins Field - Vessel Activity

Penguins Field Development - Bundle XT Tie-ins and DC2 Bundle XT Tie-ins

Seven Atlantic DSV – FPSO Bundle XT Tie-Ins (Subsea 7) Penguins Redevelopment Project - Infield 20/03/21 – Depart Field 03/04/21

Greenfield tie-in work within the Penguins field, connecting the 3 new DC7 flowbases to the newly installed FPSO bundle.  The scope will include barrier testing, spool deployment and installation, TSCJ installation and subsequent mattress and grout bag protection works.

 

 

Seven Oceanic RSV – Wet Store Spools Ph1 (Subsea 7) Penguins Redevelopment Project - Infield 10/04/21 – Depart Field 20/04/21

Main scope will include the wet storing of new tie-in spools within the Penguins Field and also the Brent C 500m zone.  Additional activities will include the installation of concrete corner blocks adjacent to the newly installed towheads and the recovery of buoyancy tanks from the newly installed bundle systems.

 

Seven Atlantic DSV – DC2 Bundle XT Tie-Ins (Subsea 7) Penguins Redevelopment Project - Infield 05/05/21 – Depart Field 19/04/21

Greenfield tie-in work within the Penguins field, connecting the PAN-N and Tybalt flowbases to the newly installed DC2 bundle.  The scope will include barrier testing, spool deployment and installation, TSCJ installation and subsequent mattress and grout bag protection works.

 

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Seagreen LIDAR buoy removal

A LIDAR buoy will be removed from the the Seagreen Offshore Wind Farm site boundary.

On behalf of Seagreen Offshore Wind Farm Ltd, Fraunhofer IWES will permanently remove a LIDAR buoy located within the Seagreen site boundary. The work boat Isle of Jura is expected to conduct the works on or around the 12th of April, weather permitting.

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Rig Move - Maersk Resolve

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Seafox 4

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Clean Seas Environmental Monitoring Programme (CSEMP)

The Clean Seas Environmental Monitoring Programme (CSEMP) will use a Granton trawl to target dab for fish disease and chemical body burden analysis. The survey will also collect sediment samples from representative sediment stations using day grab.

This work is being undertaken to evaluate sediment contamination levels and benthic community abundance at a number of locations around the English coastline. The information generated during this survey will be used to meet UK’s obligations for reporting of contaminant, eutrophication and marine litter data to MERMAN and the ICES database and for subsequent assessments for OSPAR and Good Environmental Status (GES descriptors 5, 8,  & 10) assessment as part of the 25 year Environmental Plan.

 

Fishing stations Farne 55°29.712’N 1°7.578’W Amble 55°17.802’N 1°15.3’W Off Tyne 55°0.498’N 1°7.998’W North Dogger 1 55°18.138’N 2°53.832’E North Dogger 2 55°4.08’N 2°5.4’E West Dogger 54°49.998’N 1°15.3’E Dogger Central 54°30.912’N 2°41.43’E North east Dogger ad 55°30.24’N 4°9.15’E Tees Bay 54°45.582’N 1°8.382’W Off Tees 54°43.998’N 0°52.998’W Flamborough 54°14.502’N 0°29.298’E Off Humber 54°3.798’N 1°47.4’E Outer Humber 53°19.002’N 0°25.698’E Indefatigable Bank 53°33.402’N 2°4.92’E Inner Wash 53°8.502’N 0°33.3’E Thames Gabbard 52°0’N 2°19.998’E Rye Bay 50°52.002’N 0°48.498’E Off Newhaven 50°45.588’N 0°0’E Smiths Knoll 52°48.666’N 2°45.33’E Alternative Smiths knoll 52°43.908’N 2°27.51’E Smiths knoll bank 52°46.476’N 2°17.25’E

 

Sediment Stations CSEMP245 55°0.498’N 1°7.998’W CSEMP295 54°43.998’N 0°52.998’W CSEMP285 54°49.998’N 1°19.998’E CSEMP345 54°0’N 2°0’E CSEMP376 53°19.998’N 0°34.998’E CSEMP386 52°58.98’N 0°20.082’E CSEMP475 52°0’N 2°19.998’E

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Sofia OWF - Turbine Array Seabed Operations

Mariners are advised that Gardline on behalf of Sofia Offshore Wind Farm Limited will be undertaking Seabed Operations within the Sofia Offshore Wind Farm turbine array.

The seabed operations are being undertaken by the M.V. Ocean Vantage and are expected to commence within the area from 7th April 2021 and last for approximately one week.  All vessels are requested to remain at least 500 m clear.

 

Operations with the Ocean Vantage will be conducted on a 24-hour basis.

Vessel Name Ocean Vantage
Call Sign HP6188
MMSI 351149000
ISMO 8405440

 

The following table details coordinates for the area of operations at the Sofia Offshore Wind Farm turbine array.

 

I.D Latitude (DDM) Longitude (DDM)
1 55 11.049N 002 11.082E
2 54 58.641N 002 33.221E
3 54 48.370N 002 15.792E
4 55 00.726N 001 53.669E

 

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Boyla 4D towed streamer survey (ABP21001)

Aker BP ASA is conducting a 4D towed streamer acquisition with PGS Geophysical AS. The vessels on the field will be Ramform Vanguard and Sanco Chaser. This is a cross border seismic survey, with the main part of the survey on the Norwegian side.

AkerBP ASA is conducting a 4D seismic survey over the Boyla field. It is anticipated that the UK section will take a maximum of four days to complete. The Survey Area at Boyla will cover 37 square kilometres in UK waters. The Greater Work Area will cover 151 square kilometres in UK water. The Company will conduct line changes in the greater work area.

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Construction of wind farm - Moray East

Due to the construction of the Moray East Offshore Wind Farm, there are several elements to this notice - safety zones; construction schedule; and buoy positions.

For background information about Moray East, please visit: www.morayoffshore.com/moray-east

 

Safety Zones

Please be advised that the Scottish Ministers have authorised the use of the safety zones during construction and operation of the Moray East Offshore Wind Farm as detailed below.

 

During construction

  • A 500 metre radius around each WTG and OSP where construction works are taking place that include sensitive activities being undertaken by vessels RAM. A maximum of three of such zones is permitted at any one time. 
  • A 50 metre radius around partially completed WTGs and OSPs where work is not underway and the risk assessments identify a need. 
  • A 50 metre radius around each completed WTG and OSP prior to commissioning and as required by a risk assessment process. 

During major maintenance

  • A 500 metre radius around all major maintenance works being undertaken around the WTGs and OSPs. No more than one major maintenance zone is permitted at any one time.

Construction Activities

It is currently anticipated that weather permitting offshore construction works will be carried out on a continuous basis (i.e. 24 hour working, seven days a week) unless notified otherwise.

 

Please be aware that by virtue of its mode of operation and the equipment deployed, construction vessels listed in the table below may be Restricted in their Ability to Manoeuvre as defined under COLREGS (International Regulations for Preventing Collisions at Sea 1972, Rule 3). Masters of vessels are therefore requested to maintain their vessels and gears at a minimum safe distance from these vessels of 500 metres when they are undertaking it work and showing the appropriate shapes and lights.  Further Notice to Mariners will be issued as construction progresses.

 

  •  
 

Company,

Vessel &

Call Sign

Survey Area

Survey Area

Start Timeframe & Duration

GV Replenish

MASY7

As above

As above

1st May 2019 for approximately 34 months

GV BOUNTIFUL

MJLF4

As above

As above

30th April 2020 for approximately 20 months

NSL Challenger

As above As above 07th March 2021 until further notice

Windcat19

2ATD3

As above As above 20th August 2020 Until further notice

Windcat 6

MXFD

As above As above from September 23rd 2020 onwards

GV Kinnaird 

GHNE

As above

As above

16th July 2020 Until further notice
GV Ability As above As above 16th July 2020 Until further notice

Acta Centaurus

As Above As Above 21st January 2021 until further notice

World Bora

OWJW2

As above As above 1st October 2020 Until further notice
HST Harri As above As above 28th January 2021 Until further notice
Windcat 40 As above As above 4th Feb 2021 until further notice
Bold Tern As above As above 5th Jan 2021 until further notice
Ndeavor As above as above 4th March 2021 until further notice
Grand Canyon 3 As above As above 30th March until further notice
Siem Day As above As above 21st March 2021 until further notice
Waterfall As above As above 30th March 2021 until further notice
MHO Gurli As above As above 07th April 2021 until further notice
Rolling Stone As above As above 09th April 2021 until further notice

 

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Rig Move – Ensco 92 to Victor Field

Chrysaor plan to move the Ensco 92 Jack-up drilling rig from the Viking field location to the Victor field location perform abandonment operations on the Victor JM 49/17-11 development well.

Destination: Victor JM 49/17-11 development well 53° 21' 03.22" N 2° 17' 43.46" E Throughout well abandonment operations there will be a dedicated ERRV on location monitoring the surrounding sea area

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Minor secondary works from CTV Waterfall

Please be advised that Moray Offshore Windfarm (East) Limited will be carrying out minor secondary works on various locations within bounds of the Offshore windfarm.

Please be advised that Moray Offshore Windfarm (East) Limited will be carrying out minor secondary works on various locations within bounds of the Offshore windfarm. The Works will be ongoing to approximately 18.04.2021, operating from the Port of Buckie or Wick using the CTV Waterfall.

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Scour Protection Operations

Moray Offshore Windfarm (East) Limited (Moray East) are planning to re- commence scour protection operations work scope at five locations within the bounds of Moray East Offshore Windfarm circa 09th April 2021.

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to re- commence scour protection operations work scope at five locations within the bounds of Moray East Offshore Windfarm circa 09th April 2021.

 

The locations of each of the four assets where scour protection will be installed is shown in figure 1 and table 1.

 

The work will comprise of rock dumping from the Rollingstone via fall pipe, area covered on each asset location is shown in figure 1 below.

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HDD Works at Boygrift, Lincolnshire - Viking Link Project

HDD (Horizontal Directional Drilling) works at Boygrift, Lincolnshire (English Landfall) planned for the Viking Link project which is a HVDC electricity transmission interconnector between Denmark & England,a joint venture National Grid and Energinet.

The HDD marine works are planned to commence on 25th February 2021 with expected completion in UK waters by the end of April 2021.

 

The HDD works cover the installation of two separate high-density polyethylene (HDPE) pipes, in separate drilled holes. Total length of each drilling is approximately 550m which will be progressed from the land side to the marine exit point.

 

The pipes to be installed are expected to arrive at the pipe temporary storage area outside King’s Lynn Port, having been towed from Norway between mid-February (first pipe) and late March (second pipe). The pipes will be stored at this site and transported individually for the installation works at the appropriate time. The installation (‘pullback’) of both pipes is expected to be completed by the end of April 2021.

 

The HDD marine works are being managed by Prysmian PowerLink carried out by Maritech International Ltd using the following vessels:

  • HAVEN SEARISER 4 - Jack Up Barge (JUB) as the main marine support platform for the HDD back reaming works and pipe pullback, as well as a support platform for the excavation works
  • Forth Drummer - for pipes transportation from King’s Lynn port to site and assistance to the HDD operations.
  • Odin - Tug for HDD pipes transportation from Norway to King’ Lynn port
  • Ariel - for crew transfers, if needed, during the operations.
  • CRC Galaxy - for diving support only.
  • Tristar, Catalina and Viscount - for support boats for the management of pipes installation as well as for the MBES survey works

Vessels:

Jackup Barge - Haven Seariser 4 call sign: 2IWO5

Multicat - Forth Drummer call sign: 2FIG9

DSV CRC - Galaxy call sign: 2JIT4

Crew Transfer - Ariel call sign: MEJB2

Support Vessel - Tristar call sign: 2FQW9

Support Vessel - Viscount call sign: 2FQW7

Support Vessel - Catalina call sign: 2FQW6

Ocean Tug - Odin call sign: OXIM2

 

Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain a safe distance, approximately 550m (0.3 nautical miles) from the areas identified. During these works the vessel will have restricted maneuverability as it completes its work scope.

 

The Communication between the JUB and rest of the vessels will be through CH67 & 72.

 

HDD Works The JUB (“Heaven Seariser 4”) is planned to sail to the exit location of the HDD prior the completion of the drilling of each bore. Interface with the drilling rig will require diver intervention and support throughout its works.

 

The Ocean Tug (“Odin”) vessel will transport HDD pipe form Norway to King’s Lynn port for temporary storage prior to pipes installation.

 

While the HDD team onshore and the JUB (“Heaven Seariser 4”) team are preparing for the pipe pull in through the drilled bore, the Multicat “Forth Drummer” will collect the HDPE pipe from the mooring place in King’s Lynn port and transport it to the working site at Boygrift. The product pipe to be installed shall be positioned at the HDD exit point and supported by the marine spread.

 

On completion of the pullback operations the pipe ends will be exposed via excavation and the verification of the depth of the pipes below the seabed level shall be performed by conducting a MBES survey.

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Inter Array cable Termination and testing

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are carrying out Inter Array Cable Testing and Termination Works within the bounds of site 1.

Inter Array Cable Termination and Testing.

 

Personnel and equipment for these works will be based on the Offshore Support Vessel, Siem Day. Personnel and equipment will be transported by Siem Day between OSPs and WTGs. Deep Cygnus and Siem Day will both be completing Testing and Termination works on the cable routes identified in Figure 3.

 

Siem Day will be restricted in their ability to manoeuvre during transfer of personnel and equipment to and from the OSPs and WTGs.

 

The overall work scope will be carried out in 2 campaigns – Campaign 1 commencing 11/11/20 to 23/01/21, now complete, and Campaign 2 commenced 24/02/21 and is scheduled to be completed on 11/06/21

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Marine recorder mooring service, removal and installation.

The University of Aberdeen will be servicing existing hydrophone moorings in the Moray Firth, and will also be removing some existing moorings, and installing additional moorings.

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Dogger Bank A & B Nearshore UXO Inspection and Clearance

The survey vessel Noordhoek Pathfinder will investigate previously identified, potential Unexploded Ordnance (UXO) in the nearshore section of the Dogger Bank A and B Export Cable Corridors (ECC).

 

Operations will be conducted on a 24-hour basis from a Dynamically Positioned (DP) vessel deploying a Remotely Operated Vehicle (ROV) to conduct the inspection works.

 

The works will not involve towing of equipment along the ECC.

 

Vessels are requested to maintain a minimum 1000m separation distance.

 

During operations the vessel will be restricted in its ability to manoeuvre and will display the appropriate day shapes and lights and will be monitoring VHF Channels 16 and 12.

 

During the operation, if any UXO are identified, disposal works will be initiated and a separate NtM will be issued.

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Havhingsten Cable - burial works (Irish Sea)

Please be advised that the remaining post-lay burial works of the Havhingsten fibre optic telecommunication cable system are planned to commence early April 2021 in the Irish Sea.

Please be advised that the remaining post-lay burial works of the Havhingsten fibre optic telecommunication cable system are planned to commence early April 2021 in the Irish Sea.

 

The supplier of the Havhingsten cable is Alcatel Submarine Networks (ASN). Intertek are the environmental and permitting consultants.

 

Cable burial will be undertaken by the ASN Ile d’Aix vessel. The cable will be post-lay buried (PLIB) using Remotely Operated Vehicle (ROV) water jetting. The burial progress speed is normally between 0.5 – 1 km/hour and subject to seabed type, burial depth and weather.

 

Planned timings of PLIB works are as per below:

Segment

Area

Latitude

Longitude

Distance

(km)

Planned start date

Duration

S1.5

Area 01 – Hibernia/GTT Crossing

53° 45.0953'N

to

53° 44.9188'N

003° 24.0854'W

to

003° 24.4559'W

0.522

Early April to early May 2021

1d

S1.5

Area 03 – Port Grenaugh Integration

53° 50.4663'N

To

53° 50.5634'N

004° 34.5189'W

To

004° 34.8442'W

0.399

Early April to early May 2021

1d

S1.4

Area 01 – Hibernia/GTT Crossing

53° 55.3559'N

To

53° 55.0624'N

004° 34.0032'W To

004° 34.0055'W

0.544

 

Early April to early May 2021

1d

S1.4

Area 02 – Western HVDC Crossing

53° 53.9806'N

To

53° 53.6811'N

004° 34.1958'W

To

004° 34.1574'W

0.557

 

Early April to early May 2021

1d

S1.4

Area 03 - Port Grenaugh BU Integration

53° 50.6516'N

To

53° 50.5634'N

004° 34.4844'W

To

004° 34.8442'W

0.427

 

Early April to early May 2021

2d

S1.3

Area 01 - Port Grenaugh BU Integration

53° 50.5634'N

To

53° 50.5701'N

004° 34.8442'W

To

004° 35.1360'W

0.320

 

Early April to early May 2021

2d

S1.3

Area 02

53° 50.9898'N

To

53° 50.7722'N

004° 59.0029'W

To

004° 59.8411'W

0.866

 

Early April to early May 2021

1d

S1.2

Area 01

54° 02.4019'N

To

54° 02.3343'N

004° 54.4595'W

To

004° 54.5145'W

0.139

 

Early April to early May 2021

1d

S1.2

Area 02 – Hibernia/GTT crossing

53° 56.0771'N

To

53° 55.7882'N

004° 58.0798'W

To

004° 58.1664'W

0.545

 

Early April to early May 2021

1d

S1.2

Area 03 – Western HVDC Crossing

53° 54.8486'N

To

53° 54.5411'N

004° 58.3330'W

To

004° 58.3772'W

0.573

 

Early April to early May 2021

1d

S1.2

Area 04

53° 51.1338'N

To

53° 50.7723'N

004° 59.1194'W

To

005° 00.2870'W

0.581

 

Early April to early May 2021

1d

 

All fishing vessels are requested to maintain an appropriate and safe distance of 500 m when passing the cable burial vessel whilst operational and should pass at the lowest possible speed to avoid vessel wash effects.

 

Vessels will be working throughout 24 hours and will display appropriate day shapes and lights during reduced visibility and night operations.

 

Cable Installation Support Vessel: Ile d’Aix                                                                                                            

(Installation support vessel working post-lay inspection and burial (PLIB))

Length Overall:                                  151.54 m

Breadth:                                              21.60 m

 

Following PLIB burial works there will be a maximum of 25m of cable surface laid with Uradact protection either side of the crossings listed below. Rock protection works will be carried out during the second half of 2021. It is advised that extra care is taken when vessels are operating near the areas and that no vessel should trawl within 0.25 nautical miles from the listed coordinates prior to rock placement. The rock berms will be over trawlable and in-line with industry standards.

 

Rock Placement Location Name

Latitude

Longitude

Western HVDC (S1.5)

53 ° 45.9867' N

003° 48.9137' W

Western HVDC (S1.2)

53° 54.7007' N

004° 58.3552' W

Western HVDC (S1.4)

53° 53.8396' N

004° 34.1792' W

 

For further information please contact the Fisheries Liaison Officer (FLO) / Fishing Industry Representative (FIR) numbers:

 

IoM Onshore FLO

Guy Sutton:                        rgsutton@outlook.com – 07624428332

 

FIR

Tom Watson:                     tomwatsonfleetwood@btinternet.com – 07903 173624

 

FLO (MarineSpace)

Bethan Owens:                 bethan.owens@marinespace.co.uk – 07833 557808

Claire Griffiths:                  claire.griffiths@marinespace.co.uk – 07498 550 586

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Dogger Bank B Geophysical Survey

The survey vessel, Fugro Venturer, will conduct a geophysical survey at the Dogger Bank B wind farm (DBB) array site

Fugro Venturer, will conduct a geophysical survey at the Dogger Bank B wind farm (DBB) array site in the Southern North Sea, between 4th April 2021 and approximately 25th May 2021. Survey operations will be continuous, 24 hours a day, the vessel towing subsea sensors up to approximately 100m behind the vessel. During operations the vessel will be restricted in its ability to manoeuvre and will display the appropriate day shapes and lights.

 

The Fugro Venturer will be surveying prescribed survey lines, which will require large turning circles. It is therefore requested that all vessels maintain a minimum 2,000m separation distance from the survey vessel and pass at reduced speed.

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Surface-Laid Cable - Havhingsten Project, Irish Sea

There are 5 areas in the Irish Sea where the Havhingsten cable has been surface-laid. The exposed cables are subject to burial works, now expected to commence early April.

All Mariners are advised to avoid the area and to take extra care when operating near these areas. It is advised that vessels should not trawl within the boundary box of the exposed cable sections as listed.

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Survey - 30km off the Coast of Ramsgate

Pole mounted multibeam echo-sounder survey of a subsea cable, approximately 30km of off the Coast of Ramsgate.

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Snagging Hazard - Dropped Object Clump Weight (360kg)

The dropped object is a clump weight (360kg). This is part of the DP taut wire system. From C10 the clump weight lays 162m north of the structure. The object rests 8m east of C10-C11 RPL.

JSA and Task plan are being compiled for a recovery with vessel crane and ROV intervention.

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Snagging Hazard - Dropped Object Weight 115kg

Wireless telemetry basket containing measuring 1.4 m x 1.4 m and weighs 115 kg when submerged.

As part of the initial drilling operations in 2019, the wellhead assembly was fitted with a cap containing a transponder for the relaying of monitoring data from downhole gauges and a basket was placed on the seabed adjacent to the well containing associated wireless telemetry equipment. 

 

It has now been observed that both the cap and the basket are no longer present. 

 

PFML are on location conducting an ROV based visual inspection of the suspended Well 205/26b-14 in the Lincoln field west of Shetland.  The Olympic Taurus arrived at the well location and deployed the ROV for inspection at the seabed.  On inspection neither the cap or basket were present.

 

No instances of snagged fishing gear or other debris have been identified on the wellhead. 

 

The risk is that trawled gear may snag on the basket and cause damage.  It is expected that he basket is too light to trap the vessel and cause any significant threat.  The cap is smaller, so there is a risk the nets may lift the cap to surface and cause a risk to personnel on the vessel.  However, as the cap is now off the wellhead, it is likely to be sitting flush with the seabed and is unlikely to be picked up by gear working in this area, as it is typically designed to bounce over the top of seabed obstacles (like the many boulders in the area). 

 

 

The vessel and ROV has conducted a search around the well, 250 m x 250 m grid with 20m line spacing, and not identified the objects.

 

PFML intend to go back to abandon the well this year, which would include an as left survey, so further efforts will be made then to locate and recover.  If not found, no other action will be taken.

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Magallanes ATIR Installation

Leask Marine will be installing Magallanes ATIR platform at EMEC test site, Fall of Warness

Please find attached the following Notice to Mariners for Leask Marine operations:

 

LM-NTM-MAG-R01-ATIR INSTALLATION

 

Leask Marine moorings will be onsite for the stated duration.

Mooring buoys are marked with Colour yellow - flash yellow light – 1 FY5s – Light range 1nm. During peak times of tide, buoys may be submerged.

The device is marked with Colour yellow - flash yellow light – 1 FY5s – Light range 3nm

Vessels are requested to maintain a safe distance of 250 meters from the submitted coordinates.

 

Dates: 17th March  to 17th April

Main Vessel: C-Fenna, Odin, ATIR, Uskmoor, C-Spartan

Location: Fall of Warness

Client: Magallanes

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Temporary Mooring - Magallanes

Magallanes ATIR tidal platform temporary mooring

Please find attached the following Notice to Mariners for Leask Marine operations:

 

LM-NTM-MAG-R01-TEMP MOORING

 

Leask Marine moorings will be onsite for the stated duration.

The device is marked with Colour yellow - flash yellow light – 1 FY5s – Light range 3nm

Vessels are requested to maintain a safe distance of 250 meters from the submitted coordinates.

 

Dates: 17th March to 17th April

Main Vessel: C-Fenna, Odin, ATIR, Uskmoor, C-Spartan

Location: Deerness Anchorage

Client: Magallanes

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Cable Protection Works - SHEFA

Leask Marine LTD has been contracted to undertake the installation Shefa cable securing brackets.

Please find attached the following Notice to Mariners for Leask Marine upcoming operations:

 

LM-NTM-SHE-R01-Cable Securing

 

Leask Marine moorings will be onsite for the stated duration.

Colour yellow mooring buoys are marked with - flash yellow light – 1 FY5s – Light range 1NM

Vessels are requested to maintain a safe distance of 350 meters from submitted coordinates.

 

EXTENDED: 1st May

Main Vessel: C-Odyssey

Location: Water Sound

Client: Shefa

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Decommissioning Ops - Wello Penguin

Wello Penguin Decommissioning Ops using Vessel C-Odyssey from 1st March to the 1st May 2021

Please find attached the following Notice to Mariners for Leask Marine upcoming operations:

 

LM-NTM-S30-Wello Decommissioning Ops 

 

Vessels are requested to maintain a safe distance of 450 meters from submitted coordinates.

 

Extended to 1st of May

Main Vessel: C-Odyssey

Location: EMEC Test Site Billia Croo

Client: Orcades Marine

 

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Turbine Foundation Surveys - Burbo Bank OWF

Operations of a remotely piloted Unmanned Surface Vessel (USV) are planned at Burbo Bank and Burbo Bank Extension Wind Farm conducting survey operations within the Offshore Wind Farm.

Activity: Operations of a remotely piloted Unmanned Surface Vessel (USV) are planned at Burbo Bank and Burbo Bank Extension Wind Farm conducting survey operations within the Offshore Wind Farm

.

Dates: Tuesday 30th of March for up to 3 days until 1st April 2021..

 

Vessel Details:

  • Name:       X 03 UNMANNED
  • MMSI:        232019976
  • Length:      4.5m
  • Beam:       2.2m
  • Speed:       3.5kts
  • Draught:   1.0m
  • Tonnage:  750kg

 

Location: The USV will be launched from Rhyl harbour and transit directly to the Offshore Wind Farm.  The USV will be working within the Offshore Wind Farm limits.

 

A support RIB “Maverick” will escort the USV throughout the operations from Rhyl harbour and will then continue transiting towards the survey site until the area is safe & clear of hazards.

 

It is requested that other vessels remain clear, so far as is practicable, during transit & survey operations.

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Export Cable Installation - Triton Knoll Offshore Wind Farm

Please be advised that vessels will be undertaking survey operations in the Triton Knoll Offshore Wind Farm export cable corridor.

For further information: Lee Cornwall, Triton Knoll Offshore Wind Farm, Tel: +44 (0) 7384 807293, email: l.cornwell@tritonknoll.co.uk

Triton Knoll Marine Coordination Centre, Mob Tel: +44 (0) 7384 807528, Tel: 0045 8213 6219, Email: tkmcc@smchse.com

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Rig Movement - Seajacks Leviathan

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.

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Rig Movement - Deepsea Nordkapp

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.

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Rig Movement - Safe Caledonia

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.

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Rig Movement - Seafox 2

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.

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Rig Movement - Deepsea Atlantic

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.

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Rig - COSL Innovator

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Ensco 92

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Thames Pipeline PL370 - Inspection

During April and May 2021 Titan Environmental, on behalf of IOG, will be performing a survey along the Thames pipeline to determine burial.

The work will consist of using the vessel Titan Discovery, equipped with vessel mounted and towed sensors to scan the seabed, over and on either side of the pipeline, with no intrusive works.

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Safe Boreas accommodation vessel in Buzzard field

The Safe Boreas accommodation vessel is mobilising to the Buzzard field on April 18th 2021 for a maximum of 190 days

The Safe Boreas accommodation vessel is being located into the Buzzard field for the turnaround period, beginning on the 18th April 2021. The accommodation vessel will use dynamic positioning and will be located within the 500 m exclusion zone of the Buzzard Platform for up to 190 days. The Safe Boreas will be linked to Buzzard QU Platform via a gangway interface.

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Subsea installations in Buzzard Field

The Seven Falcon DSV is scheduled to mobilise 3rd April to carry out subsea installations in the Buzzard Field

The Seven Falcon DSV is scheduled to mobilise 3rd April to install the umbilical’s and complete the installation of the water injection tie in spool to the Central Water Injection flowline in the Buzzaard Field. Mobilisation activities and transit to field are estimated to take 1.5 days, post DP trials umbilical installation should commence 5th April. 

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Site and Pipeline Survey - Southwark Field (Ref: 1209)

Independent Oil and Gas (IOG) is developing the Southwark Field, involving the installation of a platform and pipeline connection to the Thames pipeline. This notice advises of survey activities being performed in advance of the installation.

During March & April 2021 Titan Environmental, on behalf of IOG, will be performing surveys, primarily located at the platform location, with additional surveys along the pipeline route to the south:

  1. a pre-installation debris and bathymetric survey for the platform will cover an area approximately 700-metres x 700-metres, centred at the proposed Southwark location, as listed below, 
  2. a pre-installation debris and bathymetric survey of the proposed 24-inch pipeline between the proposed Southwark platform location and the Thames pipeline.

The work will consist of using vessel mounted and towed sensors to scan the seabed, with no intrusive works.

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Kincardine Offshore Windfarm - Development

Horizon Artic call sign: CHA2033 will shortly begin a campaign of moorings installation at the Kincardine offshore wind farm.

Additional work will be continuing for the commissioning of the turbine, requiring regular crew boat transfers on a daily basis.

 

The floating wind turbine KIN-03 complete with assembled wind turbine is moored in its operational location. 

 

  Location Light Sound Signal
North Corner (with Turbine C1) 56°59.356’N   001°51.983’W Yellow every 5 seconds -
South East Corner (C2) 56°59.340’N  001°52.037’W Yellow every 5 seconds Morse “U” every 30 seconds
South West Corner (C3) 56°59.322’N  001°51.984’W  Yellow every 5 seconds -
KIN-03-ML1 Anchor As-Built 56°59.587’N  001°51.749’W N/A N/A
KIN-03-ML2 Anchor As-Built 56°59.338’N  001°52.518’W N/A N/A
KIN-03-ML3 Anchor As-Built  56°59.048’N  001°51.709’W N/A N/A

 

Horizon Artic call sign: CHA2033 will shortly begin a campaign of moorings installation at the Kincardine offshore wind farm.

 

Estimated Arrival of the Horizon Arctic in the field will be 01/04/2021 and the duration of the installation will be about 7 days. The works expected are as follows:

KIN-02 56°59.835'N  01°52.428'W
KIN-05 57°00.632'N  01°50.861'W
KIN-01 57°00.318'N  01°52.870'W

 

Cable Guard Vessel: MV Fisher Boys FR54  call sign: MXHY7

 

 

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Survey - Dogger Bank B Windfarm

The Fugro Venturer is due to undertake a Geophysical survey at the proposed Dogger Bank B windfarm location in the Southern North Sea, 193 kilometres East of Newcastle, between 4th April 2021 and approximately 25th May 2021.

Survey operations shall be conducted 24 hours a day and the vessel shall tow subsea sensors approximately up to 100m behind the vessel.  During operations the vessel will have restricted manoeuvrability. The Fugro Venturer will be surveying prescribed survey lines, which will require large turning circles, therefore, it is requested that all vessels operating within this area keep their distance, maintaining at least the 2,000 m exclusion zone around the vessel and pass at reduced speed.

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Survey - 2AFRICA SUBSEA CABLE SYSTEM

Alcatel Submarine Networks has contracted Fugro to carry out a cable route survey for the proposed 2Africa cable systems. MV Fugro Meridian - Call Sign: C6QR4.

Please be advised that Fugro will be carrying out marine operations on behalf of Alcatel Submarine Networks for the 2AFRICA SUBSEA CABLE SYSTEMS.

 

The operations along the route will be carried out from approximately 5 December for approximately eight weeks. The exact finish date will be dependent on the prevailing weather conditions and work progress.

 

The vessel will be running a hull mounted multibeam echo sounder along several lines in a 500 to 1000 metre wide corridor centred on the proposed route. Towing equipment such as magnetometer and side scan sonar will be used throughout the works. Time to time the vessel will slow down or stop to measure water properties, as well as perform geotechnical measurements, necessary for this kind of study.

 

It is requested that all vessels operating within this area keep their distance, maintaining at least a 1000 metre exclusion zone, and pass at minimum speed to reduce wake interference over the sensor readings.

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Gwynt y Môr Cable Repairs

A section of the Gwynt y Môr subsea cable is currently raised approximately 2m from the seabed. It is advised that extra care is taken when vessels are operating near these areas and that no vessel should trawl within 250m of the area.

Please be advised that during repairs of the Gwynt y Môr subsea cable a section of cable has been left raised approximately 2m off of the seabed. Guard vessels remain on site when weather permits, however it is advised that extra care is taken when vessels are operating near these areas and that no vessel should trawl within 250m of the given coordinates.

 

This work started in January, and is now expected to be completed by the 29th March 2021. In the coming days a fixed yellow special marker buoy will be deployed by Trinity House to mark the location of an exposed cable bight which is sitting approximately 2 metres proud of the seabed. 

 

Special Marker Buoy

 

Trinity House are due to deploy a fixed yellow special marker buoy and moorings at a location approximately 70m NE of the cable bight (note that Guard Vessels will be on station prior to the installation of this buoy and will leave after its installation .

 

The purpose of this buoy is to alert mariners to the location of the cable bight.  The cable bight and the buoy mooring are both a potential danger to commercial fishing and angling vessels operating in the area.

 

Photographs of the type of buoy due to be installed, a map of its location, and the buoy specification are given in a notice here.  The key details are summarised below:-

  • Location:  53°23.052'N  003° 35.489'W (WGS 84).
  • Specification: Yellow buoy, 4.1m diameter, 3.5m tall piller.
  • Lantern: Flashing Yellow every 5 seconds (Fl Y 5s).
  • Mooring: 5 tonne pancake sinker.

To ensure the safety of mariners, all vessels are kindly requested to observe a 500m safety exclusion zone around this buoy.

 

The buoy will stay in place for the foreseeable future until a permanent solution is put in place allowing for the cable to be re-terminated and buried as originally planned.

 

 

 

 

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Survey - Catcher Area (Ref: 1203)

A 42 Day Catcher Area Survey between the 17th April 2021 - 29th May 2021. Using the vessels PGS Ramform Hyperion call sign: C6DB4, Thor Omega call sign: OZ2065, Groen Miranda call sign: 6CR7

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Petroleum Geo-Services

PGS Ramform Hyperion

C6DB4

Thor Omega

OZ2065

Groen Miranda

6CR7

6650m

5m

17/04/2021 - 29/05/2021

For 42 Days

28

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Survey - East Orkney Site Survey (Ref: 1206)

A 6 Day East Orkney Site Survey between the 9th April 2021 - 30th September. Using the vessel Geo Ocean III Call sign: LXGP.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

GEOxyz UK

Geo Ocean III

LXGP

150m

3m

09/04/2021 - 30/09/2021

For 6 Days

6,7,12,13,14

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Export Cable Installation (Beach) - Hornsea Project Two

Ørsted are expected to commence export cable installation works in the intertidal area on or shortly after 1st April 2021 as part of the ongoing construction of the Hornsea Project Two Offshore Wind Farm.

Landfall Preparation and Cable Installation Please be advised that export cable installation activities in the intertidal area, including beach preparation, are due to re-commence at the landfall at Horseshoe Point, Lincolnshire on or shortly after 1st April 2021 until approximately 30th September 2021. Works will be continual and intermittent throughout these periods.

 

It should be noted that export cable seabed preparation and installation seaward of mean low water springs is ongoing until end of 2021

 

Vessels:

 

Vessel & Call Sign Activity

Ndurance

5BVH3

Cable Installation and burial

Coastal Vanguard

PCFH

AHT

Linestroom

PICW

AHT
Maagd Landfall tranporattion barge

Titan Endeavour

2ELT9

Nearshore Survey

 

 

 

 

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Survey - Leman Pipelines (Ref: 1208)

A 5 Day Leman Pipelines Survey between the 15th April 2021 - 31st May. Using the vessel MV Ocean Reliance Call sign: HP6391.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Gardline Limited

Ocean Reliance

HP6391

N/A

15/04/2021 - 31/05/2021

For 5 Days

49

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Dredging - Area 457

Dredging will commence on the 15/08/2021 for a period of 10 weeks in the call off zone within Marine Aggregate Licence Area 457 (MA234).

Dredging within Marine Aggregate Licence Area 457 is restricted to two active zones and a third call off zone. In order for dredging to occur within the third call off zone, at least 6 weeks notice is required prior to dredging can commence.

 

In order for effective implementation and notification, this notice provides sufficient time prior to dredging is scheduled to commence. Dredging is sheduled to commence on the 15/08/2021 for a period of 10 weeks. 

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Survey - Hornsea Four Offshore Windfarm

Hornsea Four Offshore Windfarm will be carrying out offshore geophysical survey using the vessel Northern Storm call sign: MISA7 from 6th April until end of July 2021.

Survey completion is anticipated by the end of July 2021. The full scope of the works is anticipated to take 90 days to complete, with approximately 45 days duration surveying the proposed export cable corridor and 60 days duration surveying the proposed windfarm array areas.

 

The vessel Northern Storm call sign: MISA7 will be utilised for this survey. A local scout vessel is also contracted to reduce potential for static fishing gear interactions.

 

The survey area will be covered using a full geophysical survey spread including towed equipment. It is requested that all vessels operating within the area keep a safe distance (at least 500m) and pass at minimum speed/reduced wash.

 

 

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Remedial Works - Western Isles - North Uist-Benbecula & Eriskay

Briggs Marine Contractors (on behalf of SHEPD) will be undertaking remedial works to two subsea electricity cable shore end landfalls on North Uist-Benbecula and Eriskay.

Remedial works will be from MLWS towards the shore end landfalls and will utilise an excavator for shore work operations. No vessels will be used during these operations.

 

Remedial works on the North Uist-Benbecula shore end will commence Friday 26th March and are expected to take approx. 4 days to complete (weather permitting), with works on the Eriskay cable to commence Tuesday 30th March 2021 and are expected to last for 1-2 days, weather permitting.

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Seabed Frame Deployment - Passage of Tiree

On 19th March 2021 Partrac Ltd. deployed one seabed mooring frame containing scientific equipment in the form of an acoustic doppler current profiling (ADCP) instrument device for a period of ~30 days to be recovered from 18th April 2021

This device is deployed to measure oceanographic parameters including the water column current profile, water level and surface wave conditions throughout this period.

 

The seabed frame is 1.5 x 1.5 m and stands 0.6 m proud of the seabed. The location is not marked by a surface mark. Consent for this deployment has been provided by Crown Estate Scotland, the Northern Lighthouse Board and Nature Scotland.

The measurement device was deployed on 19th March 2021 and it is expected to be recovered from 18th April 2021. The frame will have no surface marker and will have a +/-200m weighted ground line laid NNE-SSW from its position.

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Rig - West Hercules

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Haeva

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Safe Zephyrus

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Elgood to Blythe & Blythe to Thames, Pipeline and Umbilical Surveys

This NtM relates to surveys being performed over the existing pipelines between the Elgood and Blythe Fields and the connection with the Thames Pipeline, in the UK sector of the southern North Sea.

During March & April 2021 Titan Environmental, on behalf of IOG, will be performing surveys, primarily located within the +/-100 metre pipeline fishing exclusion/safety zones at the following locations:

  1. A pre-installation survey for an umbilical, which will be laid immediately adjacent to the 6-inch pipeline between Elgood and Blythe, 
  2. A survey of the existing 6-inch pipeline between Elgood and Blythe,
  3. A survey at the Blythe platform site, partly covered by the pipeline exclusion/safety zones,
  4. A survey of a site connecting the 12-inch Blythe pipeline to the 24-inch Thames pipeline connection site.

The work will consist of using vessel mounted and towed sensors to scan the seabed, with no intrusive sensors.

 

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Export Cable Installation - Hornsea Project Two

Ørsted will be commencing export cable remedial works where the cable is currently being wet-stored, as part of the export cable installation scope for the Hornsea Project Two Offshore Wind Farm.

Mariners are advised that the Titan Endeavour is mobilising to site to carry out survey works that will continue intermittently through 2021.

 

Activities are being carried out on the Hornsea Project Two Offshore Wind Farm export cable route. Mariners are advised that MaxSea and Olex plotter files of the proposed works area can be provided by the Project’s Commercial Fisheries Advisors at Brown and May Marine Limited and the Project’s onshore fisheries liaison.

 

Export Cable Installation

Please be advised that Boskalis will be undertaking cable remedial works on or around 15th March 2021 with the BokaBarge 82, Voe Vanguard, Lingestroom and Barney at the location where the cable is currently being wet stored. In addition to this, the Titan Endeavour will be mobilising to site shortly to carry out survey works that will continue intermittently through 2021.

 

Boskalis are temporarily wet storing a cable at the RCS and the OSS. A guard vessel will be present, subject to safe weather conditions, whilst the cable is wet-stored but it is advised that mariners maintain a safe clearance. 

 

Note that the vessels will have limited manoeuvrability, some vessels will be operating on anchors, and it is requested that all vessels operating near the vessels maintain a safe distance (at least 500m) and pass all vessels at minimum speed.

 

Export Cable Corridor Boulder Clearance

Please be advised that Hornsea Project Two will be continuing boulder clearance within the export cable corridor using the Atlantic Tonjer call sign: HOBO on or around 25th March 2021.

 

The works will continue intermittently through to Q2 2021. This Notice will be updated and re-issued when works are completed.

 

Note that the vessels will have limited manoeuvrability and it is requested that all vessels operating near the vessels maintain a safe distance (at least 500m) and pass all vessels at minimum speed.

 

Array Cable Seabed Preparation & Installation

Ørsted will be commencing pre-lay surveys and seabed preparation for array cable installation with the Simar Esperanca and rock deployment with the Flintstone on or around 21st March 2021, shortly followed by array cable installation itself on or around 15th April 2021. In addition to this, Seaway Offshore Cables (SOC) and Sulmara may be trialling an autonomous survey vessel within the Hornsea Project Two array area which will be supported by a dedicated support vessel, queries related to this scope should be directed to SOC / Sulmara.

Works will be continual and intermittent throughout this period. The works will be undertaken by a number of vessels at different times according to the Project schedule. This Notice will be updated and re-issued when works are complete.

Note that the vessels will have limited manoeuvrability and it is requested that all vessels operating near the vessels maintain a safe distance (at least 500m) and pass all vessels at minimum speed.

 

 

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Sofia OWF - ROV Investigation

All Mariners are advised that Sofia Offshore Wind Farm Limited (SOWFL) has contracted Ocean Ecology Limited (OEL) to carry out ROV investigation work within the proposed Sofia Offshore Wind Farm (SOWF) turbine array.

Please be advised that from the 1st April 2021, Ocean Ecology will be undertaking an ROV survey within the SOWF turbine array.  The ROV survey will consist of a work-class ROV equipped with 3D reconstruction system, 2D multibeam imaging sonar, 4K camera and dredge skim to investigate a seabed feature. 

 

Survey operations will be undertaken aboard the 65.9m vessel ‘Glomar Wave’ and are expected to last between 2-3 days, with the exact start and finish dates dependent on the prevailing weather conditions and work progress.

 

As the Glomar wave will be restricted in her ability to manoeuvre whilst equipment is deployed, mariners are requested to remain at a safe distance from the survey vessel, and of no less than 500m where possible.

 

Vessel Details - Glomar Wave

Length 65.9m Call sign 3FXF4
Gross Tonnage 2177 tons IMO 9682617
MMSI 356301000 Port of Registry Panama

 

 

Table of Coordinates for Activity

Point Easting (UTM31) Northing (UTM31) DDM Longitude (WGS84) DDM Longitude (WGS84)
1 465989 6093527 54 61.7171N 002 28.1088E
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Beach Survey - Hornsea Project Four

Orsted Hornsea Project Four Limited will commence beach based geotechnical surveys from early April 2021. This survey is being undertaken for the purposes of geological investigation of the cable landing of the proposed Hornsea Four Offshore Wind Farm.

Activities will take place in the Hornsea Four landfall area. The extent of the area in which the survey will be conducted is shown in the map overleaf. Survey personnel and equipment will arrive and undertake works from an all-terrain vehicle on the beach.

 

The operations will commence in early April 2021. Within the beach area up to a total of 8 samples to a maximum depth of 20m will be made.

The works are envisaged to take a maximum of 24 hours at each location (excluding any delays), with the survey team anticipated to be on site for approximately 3 weeks. The exact survey dates are dependent on weather and work progress.

Survey technicians will access the beach with an all-terrain vehicle(s) and the beach area will be surveyed by technicians on foot.

The beach will remain open to the public and every effort will be made to ensure that the survey does not inhibit existing beach use.

 

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Rig Move – Ensco 92 to Viking Field

Chrysaor plan to move the Ensco 92 Jack-up drilling rig from the Vulcan field location to the Viking field location to perform abandonment operations on the Alexandra exploration well 49/11a-6.

Destination:

 

Alexandra exploration well 49/11a-6.

53° 32' 23.30" N

2° 11' 46.04" E

 

Throughout well abandonment operations there will be a dedicated ERRV on location monitoring the surrounding sea area.

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Rosebank Field Metocean Monitoring Buoys

4 x metocean monitoring buoys in the Rosebank Field area 1 x surface wave buoy 3 x subsurface buoys at 40m, 160m, and 630m

4 x Metocean monitoring buoys will be in place at the Rosebank Field until approximately Q4 2021.

3 of these buoys are subsurface with only the wave monitoring buoy on the surface.  

 

The wave buoy is painted yellow, equipped with solar panels, flashlight, active and passive radar reflectors. The active radar reflector responds to interrogating X-band radar (9.3-9.5 GHz)

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Survey - West of Gigha

The Scottish Salmon Company (SSC) will be carrying out a Hydrographic survey in March, West of Gigha. The proposed works are planned to start on 17th March 2021 and will last approximately 110 days

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Tolmount Development Area

Notice to alert sea users to the ongoing drilling activity of the Valaris 123 Jackup Drilling Rig at the Tolmount Platform in Block 42/28d .

The Tolmount minimum facilities platform has been installed on behalf of the Tolmount Development Project (comprising Premier Oil UK Limited, ODE Asset Management Limited and Humber Gathering System Limited (HGSL)) in UKCS Block 42/28d and an ERRV remains on location in field. 

 

The Valaris123 Jackup Drilling Rig is in position over the Tolmount platform, with drilling operations underway.  Drilling activity is planned for approximately 12 months (subject to further Kingfisher bulletins). NW well is now completed and the Valaris 123 has skidded to the SE well slot to recommence drilling operations.

 

Please note that an Offshore Development Area has also been requested for the Tolmount Development Project work.

 

The Boskalis BOKA Polaris Diving Support Vessel is scheduled to mobilise from Nigg, on the 22nd March 2021 for circa. 2 weeks diving operations at the Tolmount Platform.

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Blyth Offshore Demonstrator - Post Construction Fish Trawl Surveys

Natural Power will be conducting otter trawl surveys at the Blyth Offshore Demonstrator wind farm. The surveys are proposed to commence from 17th March 2021 and will be completed 1 day after commencement (otter trawl survey duration 1 day).

The survey time may vary due to weather conditions as a calm sea state is required. The vessel undertaking these surveys will be the ‘Princess Royal’ call sign: 2EYM2.

The purpose of the survey is to assess the diversity and distribution of the fish population in and around the turbine array. Survey details:

Otter Trawl Survey

  • Survey duration will be one day and consist of eight tows in total with duration of thirty minutes each at 3.5 knots. The trawl data will be collected across eight sampling stations.
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West of Shetland – Power Reinstatement Project - Stage 1

The Far Superior (Call Sign: LATJ7) will be carrying out Rock Dump Removal / Dredging activities BETWEEN the various locations noted below :

The Far Superior (Call Sign: LATJ7) will be carrying out Rock Dump Removal / Dredging activities BETWEEN  the various locations noted below :

 

Start date = 3rd April 2021

 

Duration expected to be approx. 14 Days

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Triton Knoll Offshore Wind Farm - Confirmed UXO Targets

Mariners are advised that two UXO targets have been confirmed within the Triton Knoll Offshore Wind Farm Array.

Please be advised that two UXO targets have been confirmed within the Triton Knoll Offshore Wind Farm Array.

 

Mariners are advised that the two confirmed targets are located within 20 metres water depth (LAT) and a 10 metre radius exclusion zone is required around each target.  The following table provides the coordinates and a description for each target.

 

Description of Target Latitude Longitude

Water Depth

(LAT) Metres

Required Exclusion

Zone (Metres Radius)

Archaeological - The item is thought to be an air-delivered bomb.  It appears to be in a stable condition and is resting on the seabed.  Marine growth and concretion cover the body, indicating it has been in situ for a significant duration. The tail section of the bomb is missing, which is typical of unexploded bombs from WWII found in these circumstances and there is a significant hole in the case. The dimensions and characteristics gathered are consistent with a 500kg German bomb. Considering the state of the bomb the Net Explosive Quantity of the bomb is likely to be <5kg. 53°31'50.249"N 00°47'45.908"E 20 10
Archaeological - The item is thought to be an air-delivered bomb.  It appears to be in a stable condition and is resting on the seabed.  Marine growth and concretion cover the body, indicating it has been in situ for a significant duration. The tail section of the bomb is missing, which is typical of unexploded bombs from WWII found in these circumstances and there is a significant hole in the case. The dimensions and characteristics gathered are consistent with a 500kg German bomb. Considering the state of the bomb the Net Explosive Quantity of the bomb is likely to be <5kg. 53°31'49.895"N 00°47'45.115"E 20 10

 

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Survey - Viking & LOGGS (Ref: 1187)

A 18 Day Survey Viking & LOGGS Fields between the 3rd March 2021 - 30th April. Using the vessel Edda Sun Call sign: LARF7.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro

Edda Sun

LARF7

N/A

03/03/2021 - 30/04/2021

For 18 Days

49

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Planned Plug & Abandoned Operations - Alexandra 49/11A-6

The Valaris Rig 92 shall be utilised by Chrysaor Production (UK) Ltd to Plug and Abandon the Alexandra well, anticipated schedule is to position the rig at the location from ~16th March 2021 until the end of April 2021.

All vessels fishing within the area are requested to maintain a wide berth and acknowledge the 500m/z protocols following establishment of the rig at the location.  Between the above dates it is requested that an area bounded by the below coordinates is avoided:

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Unexplained Ordnance & Boulder clearance - Seagreen Offshore Windfarm

An unexploded ordnance and boulder clearance geophysical survey will take place within the Seagreen Offshore Windfarm site boundary.

The survey vessel, Geo Ranger will utilise towed array equipment with side scan sonar, sub bottom profiler and magnetometer to conduct the survey of all 114 Wind Turbine Generatorpositions and 1 Offshore Platform location within the Seagreen site boundary.The survey vessel is expected to arrive at site on or around Sunday the 21st of March and remain until August 21, weather dependant.

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Rig - Valaris 72

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Pipeline Span - Freespan on pipeline PL22

Freespan Remediated by concrete mattresses

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Survey - Brodgar Infill 2021 (Ref: 1200)

A 3 Day Survey Brodgar Infill between the 15th April 2021 - 31st May. Using the vessels SW Amundsen Call sign: 5BXE2, MV Scorpio call Sign: ZDRF7 & Tess Call sign: YJUV8

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Shearwater GeoServices AS

SW Amundsen

5BXE2

MV Scorpio

ZDRF7

Tess

YJUV8

8000m

15m

15/04/2021 - 31/05/2021

For 3 Days

21

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Survey - Regional Survey (Ref: 1198)

A 81 Days Regional Survey between the 15th April 2021 - 30th September. Using the vessels SW Amundsen Call sign: 5BXE2, Support Vessel MV Scorpio call Sign: ZDRF7 & Astra-G sign: HP8120

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Shearwater GeoServices AS

SW Amundsen

5BXE2

MV Scorpio

ZDRF7

Astra-G

HP8120

8100m

8m

15/04/2021 - 30/09/2021

For 81 Days

210, 211

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Nearshore Pre-Cable Installation Works - Neart na Gaithe OWF

Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) are due to commence preparation works for the export cable installation, within the nearshore extent of the Export Cable Corridor. The works are due to commence on the 13th March 2021 at the earliest.

Two jack-up vessels, Capall Mara (MBSF3) and C57 Red Squirrel (J8B5722), will carry out a small amount of seabed preparation operations and undertake trenching works along a short section of the nearshore cable route.

The Capall Mara backhoe dredger will work along the two cables routes within the nearshore area, a first pass will be made where the vessel will reposition boulders between KP0.65 and KP1.4 followed by a second pass of each route where the vessel will excavate a trench within which the cable will be laid.

 

Excavated material will be temporarily repositioned to the side of the trench and will be backfilled by the Capall Mara once the nearshore cable installation is completed.

C57 Red Squirrel will work at KP0.65, to excavate two pits at the existing HDD exits and conduct minor construction works associated with the HDD exit point. The jack up vessel C57 Red Squirrel will arrive on site supported by two tugs, Forth Trojan (2FYM4) and The Battler (MGHD9).

A Crew Transfer Vessel, Celtic Guardian (21ZH5), will transfer personnel between the Capall Mara and C57 Red Squirrel and Eyemouth harbour each day. Celtic Guardian will also support with periodic minor surveys of the route. A dive vessel, CRC Tempest (MYUY7) will also work alongside the C57 Red Squirrel providing dive support associated with the minor HDD Construction works, as required.

Vessels are requested to remain at least 500 metres away from the Capall Mara and C57 Red Squirrel. Static fishing gear is requested to remain removed from the updated exclusion area

 

Area of Operations Mariners are advised that the Capall Mara and C57 Red Squirrel, alongside a number of supporting vessels, will be mobilised to work within the nearshore area of the NnG Export Cable Corridor' The nearshore exclusion zone will replace the existing exclusion area in place from the date of this notice.

Schedule The pre-enabling construction works are due to recommence on the 13th March 2021, at the earliest, and is expected to last approximately six weeks, until 30th April 2021, weather dependent. After this work, the preparation for cable installation will commence, in early May 2021, ahead of cable installation in June and July 2021. A further notice to mariners will be issued outlining the next phase in more detail.

Weather permitting, construction works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week) on the Capall Mara and on a daytime only basis (i.e. 12-hour working, seven days a week) on the C57 Red Squirrel.

 

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Survey - Amethyst C1D Noise Monitoring Survey

Perenco UK Limited plan to use explosive charges placed underground to perforate the well castings.

Subacoustech Environmental Ltd will monitor the underwater noise emissions resulting from these to generate a mathematic model of noise propagation (UKCS 47/14) utilising the Boston Putford Phoenix.

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Decommissioning Activities – Hydrocarbon Free Activities on the Amethyst A1D Installation

Planned Hydrocarbon Free works are due to commence on the Amethyst A1D platform (UKCS 47/14).

The HAEVA Mobile Offshore Decommissioning Unit (Modu) will depart from Vlissingen in the Netherlands 3rd March 2021 (dependent on weather) and transit to the Amethyst field, where it will commence Hydrocarbon Free operations.

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Survey - Geological (Ref: 1201)

A 4 Day survey between the 29th March 2021 - 30th April.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Gardline

TBC

3750m

4m

29/03/2021 - 30/04/2021

For 4 Days

8

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Bathymetry Survey - HI1518 Mermaid Shoal

Please be advised that A-2-Sea Solutions will be carrying be carrying out a Civil Hydrography Programme nautical charting survey on behalf of the MCA.

A-2-Sea Solutions Ltd will be operating the vessel 'Cerys Line' on a 24-hr basis. The 'Cerys Line' (26.1m LOA) will be underway throughout operations, sailing survey lines at 5-12 knots. The 'Cerys Line' will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

 

Please not that no towed equipment is to be deployed, this is an echosounder survey for nautical charting.

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Deployment of Current Profiler - Mermaid Shoal

Mariners are to be advised that a seabed frame mounted Current Profiler, primarily measuring currents, will be deployed in one location in Mermaid Shoal.

The current profiler is scheduled to be deployed in early April 2021 by the vessel 'Cerys Line'. The current profiler will be isolated from the surface completely with no buoys or markers attached. The survey frame is approximately 1m high and will be attached to a clump weight by a weighted rope. 

 

The current profiler will be in position on the seafloor for a minimum period of 30 days.

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Cable Fault - BritNed HVDC Cable

Following the repair of a recent fault, another fault has developed, believed to be further to the east, since the repair was completed. Consequently, the safety zone is being extended to include the area of the new fault.

Following a recent fault (caused by impact damage) and subsequent repair to the BritNed HVDC Interconnector, the repaired section although trenched, is still in the process of natural backfill and areas of exposure remain. A guard vessel (currently M/V FORTUNA) remains on site. Another fault, still under investigation, has developed, believed to be further to the east, since the repair was completed. Consequently, the safety zone is being extended to include the suspected area of the new fault.

 

We wish to remind ship’s captains of the presence of subsea cables and request that extra caution is exercised when operating near charted cables in order to avoid any incident. Due to changing seabed conditions it should not be assumed that all cables are buried.

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Isabella Project - Site Survey

The Ocean Resolution (Call Sign: 3EIP9) will be carrying out a Site Survey within the area noted below:

Survey is expected to start on 16th March and take 2 to 3 weeks to complete.

Vessel will be towing 1.3km streamer.

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Survey - Alvhelm Prospect (Ref: 1193)

A 6 Day Site Survey at the Boyla Prospect between the 01st April 2021 - 31st August. Using the vessels Ramform Vanguard Call sign: C6TU8 & Sanco Chaser Call sign: ZDHH3.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

PGS Geophysical AS

Ramform Vanguard

C6TU8

Sanco Chaser

ZDHH3

6500m

6m

01/04/2021 - 31/08/2021

For 4 Days

9

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Survey - Boyla Prospect (Ref: 1192)

A 4 Day Site Survey at the Boyla Prospect between the 01st April 2021 - 31st August. Using the vessels Ramform Vanguard Call sign: C6TU8 & Sanco Chaser Call sign: ZDHH3.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

PGS Geophysical AS

Ramform Vanguard

C6TU8

Sanco Chaser

ZDHH3

6500m

6m

01/04/2021 - 31/08/2021

For 4 Days

9

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Survey - Ketch Platform 500m zone (Ref: 1195)

A 8 Day Ketch Platform 500m zone Survey between the 22nd March - 30th April 2021. Using the vessel Atlantis Dweller Call sign: 8PAB3.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro

Atlantis Dweller

8PAB3

N/A

22/03/2021 - 30/04/2021

For 8 Days

44

Type See detailed map on our bulletin website
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Survey - NW Schooner Platform 500m zone (Ref: 1197)

A 5 Day NW Schooner Platform 500m zone Survey between the 22nd March - 30th April 2021. Using the vessel Atlantis Dweller Call sign: 8PAB3.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro

Atlantis Dweller

8PAB3

N/A

22/03/2021 - 30/04/2021

For 8 Days

44

Type See detailed map on our bulletin website
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Survey - Schooner Platform 500m zone (Ref: 1196)

A 8 Day Schooner Platform 500m zone Survey between the 22nd March - 30th April 2021. Using the vessel Atlantis Dweller Call sign: 8PAB3.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro

Atlantis Dweller

8PAB3

N/A

22/03/2021 - 30/04/2021

For 8 Days

44

Type See detailed map on our bulletin website
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Scapa Field - Umbilical Installation & DSV Intervention

RSRUK give notice of DSV intervention in the Scapa Field, for the installation of a new control umbilical between the Claymore A Platform and the Scapa Template, including associated diving works.

The SCAPA production protection project will aim to safeguard production from the current 3 operating Subsea wells, and in addition will re-start production from E12.

 

Gas lift is required for production for each of the four Subsea Wells. Of the original 6 gas lift lines, 3 have been removed form service due to external corrosion and the others are to be retired during the project.

 

Gas life will be provided to the SCAPA template by re-purposing an existing 6" test line. Control of gas lift will be performed by the introduction of 4 new subsea gas lift chokes (one per well) and a dedicated control system to allow individual control feedback.

 

A new electro-hydraulic umbilical will also be installed to safeguard chemical injection routing from the Claymore platform to the field as part of the project. This will also provide the conduit for hydraulic and electrical control/feedback to the newly installed subsea chokes.

 

A water Injection Flowmeter and Pressure/Temperature Transducers shall also be installed to aid feedback from the Scapa Subsea system.

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Seabed Frame Deployment - Kibrannan Sound

Partrac Ltd. have deployed one seabed mooring frame containing scientific equipment in the form of an acoustic doppler current profiling instrument (RDI 300kHz) device, for a period of ~30 days. Deployed on 5th March 2021 expected recovery 4th April 2021.

Partrac Ltd. have deployed one seabed mooring frame containing scientific equipment in the form of an acoustic doppler current profiling instrument (RDI 300kHz) device, for a period of ~30 days.

 

This device is deployed to measure oceanographic parameters including the water column current profile, water level and surface wave conditions throughout this period.

The seabed frame is 1.5 x 1.5 m and stands 0.6 m proud of the seabed. The location is not marked by a surface mark. Consent for this deployment has been provided by Crown Estate Scotland, the Northern Lighthouse Board and Nature Scotland.

The measurement device was deployed on 5th March 2021 and it is expected to be recovered from 4th April 2021.  

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Rig - COSL Promoter

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig Move - Maersk Resilient

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Catcher Field 3D / 4D Seismic Survey

Premier Oil UK have contracted PGS to conduct a Seismic survey over the Catcher Area assets located in block 28/9, the survey will also partly extend into blocks 28/3, 28/4 and 28/10. The survey is planned to commence 17th April 2021 and last 33 days.

The Seismic survey vessel to be used by PGS is the PGS Ramform Hyperion, call sign C6DB4, registered in the Bahamas. It is due to be mobilised from Flora in Norway on the 11th April and start shooting Seismic on 17th April 2021. The survey is due to last 33 days.

 

PGS Ramform Hyperion will be accompanied by two other vessels. The Thor Omega (support vessel)  that will also mobilise from Flora and the Groen Miranda (escort vessel) , which will mobilise from Scheveningen, Netherlands.

 

Seismic survey operations will be by active surveying and the firing of airguns

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Pipeline Activities - Arran Field

A Pipeline Initiation System (an arrangement of anchors, chains and wires) has been installed within the Arran South 500m safety zone (installed on 28/09/20). Further vessel activity will be taking place in the area as below.

CSV (Seven Arctic) – ASTIS Install (Subsea 7) Arran Field Development – Infield  15/03/21 – Depart Field 22/03/21

  • Arran South Tie-in Structure installation

 

DSV (Seven Falcon) – Spool & Umbilical Installation (Subsea 7) Arran Field Development - Infield 18/04/21 – Depart Field 27/04/21

  • 12” spool installation at Arran South
  • Hook up umbilicals at Arran South
  • Mattress protection at Arran South (12” spools and umbilicals)

 

DSV (Seven Falcon) – Pipeline Leak Test and Dewatering (Subsea 7) Arran Field Development - Infield 27/04/21 – Depart Field 18/05/21

  • 12” spool installation at Shearwater
  • Pipeline leak test at Columbus
  • Mattress Reinstatement
  • Dewater pipeline system at Arran North
  • Umbilical tie-ins at Arran South
  • 6” XT spools & TSCJ at Arran South
  • Tree spool leak test
  • OCH install at Arran South
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Survey - Project Erebus Floating Offshore Wind Farm

A geophysical survey is due to be undertaken of the proposed Erebus and Valorous Floating Offshore Wind Farm (FLOW) projects. USing the vessel Geo Ocean IV call sign: LXHD from the 02 March 2021 until 30 April 2021.

The survey will involve the use of Multibeam Echosounder (MBES), Sidescan Sonar (SSS), Sub-Bottom profiler (SBP) and Magnetometer equipment, some of which will be towed sub-surface astern of the vessel.

The survey will cover the following:

  • Erebus offshore array area, plus 1km buffer;
  • Valorous offshore array area;
  • Valorous offshore cable corridor; and
  • Freshwater landfall options.

The extent of the planned survey is shown in the attached figure. Coordinates of the offshore array (and buffer) are also provided below. The work will be undertaken by one vessel, operated by the survey contractor, GEOxyz  Vessel: Geo Ocean IV  LXHD

 

Please note the Freshwater landfall area will be completed either on weekends during the estimated outline programme of works above or during the period from 29.03.21 to 10.04.21.

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Neart na Gaoithe Offshore Wind Farm - HDD Marine Works

Mariners are advised that Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) have completed the HDD supporting works within the nearshore extent of the Export Cable Corridor.

As part of the completed works, the two separate HDD ducts have been cut back to a level just above the seabed and capped in preparation for upcoming export cable works. The height of the end of the ducting above the seabed (stick-up height). Each HDD exit location has been marked temporarily by a surface marker buoy. As-laid positions of the marker buoys are also provided.

The next scheduled works are due to begin the week commencing 15th March 2021, at the earliest. A notice to mariners will be issued in advance of these works, to notify of the start date.

 

 

 

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Cod Trawl Survey - Beatrice Offshore Wind Farm

Post-construction cod trawl surveys will take place at selected locations within the BOWL site, and adjacent areas, including within Moray East windfarm and the proposed site for Moray West windfarm.Trawls will take place in the 1st & 4th weeks March 2021

Post-construction cod trawl surveys will take place at selected locations within the BOWL site, and adjacent areas, including within Moray East windfarm and the proposed site for Moray West windfarm. Trawls will take place in the first and fourth weeks of March 2021 using the Fishing Vessel Reaper WK 83 call sign: MFIX5

 

The Beatrice windfarm is located approximately 11nm SE of wick.

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Deployment of Buoys - West Gabbard

Recording oceanographic equipment has been moored at West Gabbard

There are a Smart Buoy and 2 yellow, Class 2 Guard Buoys carrying radar reflectors at the site.

All three buoys are fitted with a yellow light exhibiting the sequence FI Y (5) 20s.

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Drilling - Grove Platform UKCS Block 49/10a

The Maersk Resolve drilling rig will be mobilising from the port of Esbjerg in Denmark on or around 10th March 2021. The rig will be undertaking drilling activities at the Grove platform in UKCS block 49/10a expected to arrive at Grove on 12th March 2021.

The rig is likely to be on location for a total period of 130 days. 

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Survey - Drilling Hazard Site Survey (Ref: 1185)

A 10 Day Drilling Hazard Site Survey between the 15th March - 15th April 2021. Using the vessel Geo Resolution Call sign: 3EIP9.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Gardline

Ocean Resolution

3EIP9

N/A

21503/2021 - 15/04/2021

For 10 Days

30

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Survey - Platform Surveys (Ref: 1184)

A 30 Day Platform Survey between the 12th March - 30th April 2021. Using the vessel Edda Sun call sign: 3EIP9

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro

Edda Sun

LARF7

N/A

12/03/2021 - 30/04/2021

For 30 Days

44, 49

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Survey - Caister CM 500m Survey (Ref: 1186)

A 2 Day Caister CM 500m Survey between the 03rd March - 30th April 2021. Using the vessel Edda Sun call sign: 3EIP9

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro

Edda Sun

LARF7

N/A

03/03/2021 - 30/04/2021

For 2 Days

44

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Survey - Area Test Survey (Ref: 1190)

A 1 Day Area Test Survey between the 24th March - 15th April 2021. Using the vessel Geo Resolution Callsign: 3EIP9.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Gardline

Ocean Resolution

3EIP9

N/A

24/03/2021 - 15/04/2021

For 1 Day

30

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Deployment of Buoy - Blyth Met Mast

Fugro have now completed planned SeaWatch LiDAR Buoy (SWLB) deployment and recovery operations in the vicinity of the Blyth Met Mast.

The SWLB referred to as WS180 has been recovered from the location south-east of the met mast and the SWLB referred to as WS155 has now been deployed on site to the north-west of the met mast. Exact locations are provided. The deployment location is within the UK Sector of the North Sea off the coast of Blyth, Northumberland.

The equipment will be deployed close to the Blyth Met Mast as part of a validation study within the existing met mast 250 m consent zone and will be deployed for a minimum period of 3 months.

Scheduled maintenance is not planned due to the short deployment duration, but unforeseen maintenance may be required.

The equipment will be moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.

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Seabed Frame Deployment - Sound of Hoy

Partrac Ltd. have deployed one seabed mooring frame containing scientific equipment in the form of an acoustic doppler current profiling instrument (Nortek AWAC) device, for a period of ~30 days. The measurement device was deployed on 2nd March 2021.

This device is deployed to measure oceanographic parameters including the water column current profile, water level and surface wave conditions throughout this period.

The seabed frame is 1.5 x 1.5 m and stands 0.6 m proud of the seabed (Figure 1). The location is not marked by a surface mark. Consent for this deployment has been provided by Crown Estate Scotland, the Northern Lighthouse Board and Nature Scotland.

 

The measurement device was deployed on 2nd March 2021 and it is expected to be recovered from 1st April 2021

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Buoy Deployment (Special Mark) - Moray East Windfarm

Intallation of a buoy (Special Mark) on the Moray East Windfarm. To be situated over the pre-existing Moray East Offshore Met Mast location

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) have deployed an additional Buoy within the Bounds of moray East Offshore Windfarm. The Buoy (Special Mark) is situated over the pre-existing Moray East Offshore Met Mast location. The Buoy is attached to the debris cap covering the cut monopile and marks the site of obstruction which stands 21.7m in water depth above the seabed. The water depth at the location is 40.32m LAT. The obstruction consists of 1.7m gravel bed, 16m caisson height, 3m monopile stub and 1m debris cap.

 

The Buoy will remain in place until such a time when the remainder of the substructure will be decommissioned and removed.

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Snagging hazard - Near Well 3/03-12

Unidentified snagging hazard at, or close to, the location of well 3/03-12.

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Route Preparation Works UK - Viking Link Project

Mariners are advised about route preparation works planned for the Viking Link project which is a HVDC electricity transmission interconnector between Denmark and England, a joint venture between National Grid and Energinet.

The route preparation works covered by this notice include boulder relocation and debris removal in UK waters and they are planned to commence on the 24th February 2021 with expected completion by the end of March 2021.

In some locations of the cable route, previous survey results have indicated seabed obstructions and items that prevent the safe cable installation, in particular boulders, which cause problems when trying to lay the submarine cable and perform burial works that are planned later in 2021.

The route preparation works are being managed by Prysmian PowerLink carried out by ASSO Subsea and planned to be carried out by mobilizing Aethra call sign: 5BHH4. The Trenching support vessel is a multi-purpose vessel capable of performing preparation works and burial works.

In Figure 3, the expected vessel transit route (coming from Middlesbrough, UK) to the start and end of the route preparation scope of work is presented.

Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain a safe distance, approximately 1000m (0.5 nautical miles) from the areas identified. During these works the vessel will have restricted maneuverability as it completes its work scope.

VHF CH 16 will be monitored at all times and will be used to contact the coastguard in the event of an emergency.

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Decommissioning Activities – HCF / Topsides Dismantlement of the Amethyst C1D Installation

Planned Topside dismantlement works are due to commence on the Amethyst C1D Platform (UKCS 47/14).

The Jack up Barge, will depart from Leman 27BT (UKCS 49/27B) 25th February 2021 (dependent on weather) and transit to the Amethyst field, where it will  commence HCF/Topsides dismantlement operations on Amethyst C1D Platform (UKCS 47/14).

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Installation of temporary marker buoy - as laid position

A Yellow Special Mark has been installed marking an exposed pipe

A temporary marker buoy has been positioned at the North of the end of the exposed duct shown in Fig 2 on the attached NtM (the highest point above sea level). The exposed duct protrudes approximately 20m from the seabed. The highest point is approximately 2.4m above seabed level or 6.5m below surface at LAT.

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Rig - Deepsea Yantai

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Transocean Endurance

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Prospector 1

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Erda - Amethyst 47/14-C1D

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Diving and Decommissioning Works - Northern Producer FPF - Dons Fields

EnQuest Heather Ltd intends to undertake Pipeline flushing, Well isolation and disconnection works in relation to the Northern Producer FPF and Dons Field decommissioning commencing 01st April 2021

The workscope comprises of a Dive Support Vessel (DSV) performing the flushing and isolation of the Gas Export pipeline from the Thistle Alpha Platform to Northern Producer FPF, the isolation and disconnection of the Oil Export pipeline at the WYE structure, the isolation and disconnection of the subsea wells from the pipelines at the West Don Field and the isolation and disconnection of the subsea wells from the pipelines at the Don South West Field.

 

On completion of the flushing and diving activities, an ROV Construction Support Vessel (CSV) will perform the disconnection of the risers from the Northern Producer FPF in preparation for the Northern Producer FPF being taken off-station and towed to port.

 

The DSV will be positioned at the Thistle Alpha Platform 500m Zone, the WYE structure, West Don Field and the Don South West Field and the CSV will be positioned within the Northern Producer FPF 500m Zone only during these activities.

 

The earliest start date for operations to commence is 01st April with the operations expected to last until the end of April. The operations will be undertaken from the following vessels:

 

Operation Vessel Dates In Field
Dive Support Vessel (DSV) Deep Discoverer 01/04/21 - 14/04/21
ROV Support Vessel (CSV) TBA 17/04/21 - 20/04/21

 

The subsea assets within the Northern Producer FPF 500m zone will remain in place on the seabed and could pose a snag hazard to fishermen therefore the Thistle Alpha Platform ERRV will act as a guard vessel until the 500m zone clearance is performed in 2022.

 

The subsea safety 500m zones around the WYE structure, West Don & Don South West fields will remain in place for the foreseeable future.  

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Suspended Wellhead : Affleck 30/19-1

Suspended wellhead structure on seabed.

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Boulders Deposited within the Brighton MCZ (UPDATE)

It has been reported that on the 23 and 25 February 2021, the Greenpeace vessel 'Esperanza' has deposited a number of boulders within the Brighton Offshore Marine Conservation Zone (MCZ). Estimated weigh ~3 tonnes each.

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Dogger Bank A landfall HDD pilot drilling First punchout and exposed pipe

This notice to mariners (NtM) relates to the landfall HDD pilot drilling at DBA. Specifically, it gives details of the first pipe punchout and shows the extent of the exposed pipe above the seabed.

The main DBA and DBB landfall HDD pilot drilling commenced beyond the MHWS location from the 4th January 2021.

 

The first of the pilot drills has punched out onto sea bed in the location shown in fig 1 and 2

 

A survey carried out to confirm accurate drill positions has shown that there is approx. 20m of exposed pipe protruding from the seabed.

 

At its highest point (Point A) the pipe end is approximately 6.5m below the surface at LAT

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Pipeline Flushing and Riser Decommissioning - Balmoral Area

Premier Oil’s project to flush & disconnect the Greater Balmoral Area subsea infrastructure and removal of associated risers in relation to the float-off of the Balmoral FPV will be undertaken between 28th February and 31st December 2021.

Locations Coordinates
Balmoral FPV & Template

58°13.727'N 001°06.427'E

Tap Valve No.3 (Forties Pipeline System) 58°06.622'N 001°09.449'E
Balmoral Satellite Well B29 58°15.127'N 001°03.323'E
Balmoral Satellite Well A2 58°13.970'N 001°07.953'E
Brenda Drill Centre 58°11.763'N 000°58.407'E
Brenda Umbilical cut point 58°13.810'N 001°06.318'E
Nicol Drill Centre 58°14.908'N 000°50.812'E
Stirling 20z Well 58°14.010'N 001°08.063'E
Glamis A26 Well 58°10.695'N 001°01.045'E
Glamis A27 Well

58°10.308'N 001°04.168'E

Burghley WH1 Well 58°16.052'N 001°14.148'E
Beauly Well 58°11.028'N 001°07.632'E

 

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Exposed Cables - Galloper Offshore Wind Farm

Update from most recent subsea survey. There is evidence of sections of cable exposure in ten areas over seven cable routes of the Galloper windfarm. Locations noted below

 

Area Start  Stop
D1J - E2J 51°48.489'N 002°02.339'E 51°48.489'N 002°02.341'E 
E3H - E4H 51°55.322'N 002°01.231'E 51°55.322'N 002°01.224'E
E4H - E5H 51°54.568'N 002°01.180'E 51°54.565'N 002°01.176'E
OSP - D3A 51°57.151'N 002°01.879'E 51°57.127'N 002°01.876'E
OSP - F3C 51°57.455'N 002°02.816'E 51°57.472'N 002°02.141'E
OSP - F3C 51°57.508'N 002°02.564'E 51°57.513'N 002°02.587'E
OSP - F4E 51°57.100'N 002°02.148'E 51°57.100'N 002°02.150'E
OSP - F4E 51°57.101'N 002°02.462'E 51°57.101'N 002°02.462'E
OSP - F6G 51°56.400'N 002°01.586'E 51°56.399'N 002°01.587'E
OSP - F6G 51°56.369'N 002°02.200'E 51°56.369'N 002°02.200'E

 

There is no cable exposure evident in the South Field of the windfarm.

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Rig - Maersk Integrator

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Cone Penetration Testing and Vibrocore Sampling at Dogger Bank A, B, C Windfarm

This notice to mariners (NtM) relates to cone penetration testing and vibrocore sampling on DBA, DBB, DBC wind farm array areas and Export Cable Corridors.

The Wilson Adriatic will be performing cone penetration testing and vibrocore sampling and will be stationary on locations for up to approximately 4 hrs.

The cone penetration testing and vibrocore sampling is expected to commence at midnight on 5th March, 2021 and conclude at midnight on 31th June, 2021 using the vessel Wilson Adriatic. Works are planned to commence in the DBC wind farm array area.

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Damaged pipeline

Physical damage to pipeline

Physical damage to pipeline, current cause unknown. Vessel on scene assessing.

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Inter Array Cable Burial works - Moray East Wind Farm

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are carrying out Inter Array Cable (IAC) burial works within the bounds of site

The cable trenching (post lay burial) will be completed by tracked- on bottom trenching tools. WROV surveys will be conducted once the cable is buried.

 

Two trenching support vessels ,Grand Canyon 3 and the Boskalis Ndeavor, will be completing operations on the cable routes identified in Figure 2.

 

Both vessels will complete launch and recovery operations of the trenching tools, and will be restricted in their ability to manoeuvre during trenching and WROV operations.

 

The overall work scope will be carried out in 2 campaigns – Campaign 1, commencing 07/11/20 to 03/01/20 and Campaign 2, commencing 20/03/21 to 12/05/21.

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Abandoned Well - 206/12a-3

This wellhead has been removed from the seabed.

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Abandoned Well - 29/04e-5Z

This wellhead has been removed from the seabed.

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Abandoned Well - 9/19b-29 & 9/19b-29A

This wellhead has been removed from the seabed.

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Rig - West Bollsta

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Drilling - Elgood Well 48/22c-H1

Petrofac Facilities Management Ltd (PFML) propose to drill and complete a production well at the Elgood Subsea location, from the 9th March 2021 for, the duration of, 89 days. The drilling operation will be carried out by Noble Hans Deul drilling rig.

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Survey - Interim Pipeline Survey (Ref: 1177)

A 10 Day Interim Pipeline Survey PL22, PL23 & PL24. From the 16th February - 31st March 2021. Using Vessel Geo Focus callsign: PCOS

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

N Sea

Geo Focus

PCOS

N/A

16/02/2021 - 31/03/2021

For 10 Days

48, 49, 52, 53

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Survey - Leman 27B Debris Survey (Ref: 1162)

A 2 Day Debris Survey Leman 27B. From the 16th February - 31st March 2021. Using the vessel Geo Ranger Callsign: PHHV.

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

N Sea

Geo Ranger

PHHV

N/A

16/02/2021 - 31/03/2021

For 2 Days

49

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Drilling Operation - Columbus

Serica Energy is to perform a drilling operation and sub-sea installation at the Columbus location, located in the Central North Sea.

  • Location Name: Columbus
  • Well Co-ordinates: 57° 20.968′ N  002° 05.237′ E
  • Tie-In Structure Co-ordinates: 57° 20.979′ N  002° 05.198′ E
  • Start Date: 01 March 2021
  • Duration: Approx. 70 Days
  • Rig Name: Maersk Resilient
  • ERRV: Esvagt Sigma
  • Safety Zone: 500 metre radius
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Abandoned Well - 44/18-2Z

This wellhead has been removed from the seabed.

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Galloper Windfarm - Defect of the Cable Protection System (CPS) inter-array cable GS-A1L

A recent ROV inspection at Galloper to assess the subsea structure of inter-array cable A1L identified a defect of the Cable Protection System (CPS) on top of the existing scour protection around the wind turbine foundation, at the point of burial.

A recent ROV inspection at Galloper to assess the subsea structure of inter-array cable A1L identified a defect of the Cable  Protection System (CPS) on top of the existing scour protection around the wind turbine foundation, at the point of burial.

 

Asset Location  GS-A1L 51° 43,972' N 1° 58,174' E 

 

As cable exposure is a known risk at Galloper and across the offshore wind industry, we would remind Mariners of the safety   information found on the KIS-ORCA website ‘The risks of fishing near cables and renewable energy structures.’   https://kis-orca.org/safety/the-risks-of-fishing-near-cables-renewable-energy-structures/ 

 

To avoid crossing cables when towing equipment follow the cable corridors- locations of the cables can be found on the   Galloper awareness charts via KIS-ORCA. 

 

An updated NtM will be issued once the remedial works is confirmed and scheduled 

 

Mariners are requested to remain a distance of 50m2 away from GS-A1L, 51° 43,972' N 1° 58,174' E, until remedial works have been carried out.  

 

Temporary exclusion area as per the below drawing.   

 

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Sound measurement study - Hywind Scotland Pilot Park

Hywind Scotland Pilot Park is performing a sound measurement study where the purpose is to document the operational noise. Successful retrieval of control sound recorder performed January 24. Failed retrieval of the sound recorder in wind park.

Update February 5:

Successful retrieval of control sound recorder performed January 24. Failed retrieval of the sound recorder in wind park.  A second attempt for retrieval of the sound equipment in the Hywind Scotland Pilot Park is being planned. The notice is prolonged and the location of the retrieved control equipment is removed from the notice.

-----

As part of the Hywind Scotland Wind Park, Equinor has subcontracted Jasco Applied Sciences to perform sound recordings in the park area and in a control location in Buchan Deep (near cross over point between the FORTIES to CRUDEN Bay oil line and the GAS line).

 

The purpose of the sound measurement study is to document the operational noise from floating offshore wind turbines and their substructures, mooring lines and cables. It is part of an internal Equinor Research &Technology project that aims to increase knowledge on possible environmental implications of floating offshore wind, i.e. in this particular study, the possible impact ranges of sound from the wind park on marine mammals and fish. The results from the sound measurement study is important also for further technology development.

 

The Equinor contracted “MCS Swath1” (crew vessel) will be used for the deployment and retrieval of the sound recorder equipment (hydrophones). The field activity in connection with both deployment and retrieval will take one day, however, the recording period will be approximately 3 months from ultimo October 2020 to ultimo January 2021.

 

The recorders were deployed October 21. Yet, no exact date is set for the retrieval of the equipment (ultimo January 2021).Activity prolonged.

 

All Equinor installed equipment shall remain in position for the duration of the survey, but all equipment will be removed from seabed when the recording period is over. Also, there will be no bouys on sea surface or lines in the water column. All equipment will be placed on sea floor at approximately 100 meters depth by the help of an anchoring plate, which fastens the equipment and eliminates drifting of equipment. The equipment will have a height of maximum 1 meter above seabed, and the plate mooring system has the dimension 914 x 527 x 864 mm.

 

This equipment collects data and information of environmental importance and could get damaged or lost if trawled over.

 

When the equipment is retrieved, the acoustic release will be activated and the equipment will be lifted by crane.

 

 

Positions for recorders in wind park  (The Control was retrieved January 24 2021 and location is removed from the map in the active notice.)

 

Location

Latitude

Longitude

Easting (m)†

Northing (m)†

Hywind Scotland

57° 29' 04.2741" N

1° 20' 33.8512" W

599357.410

6372534.418

Control

57° 31' 48.0000" N

1° 07' 33.6000" W

612209.809

6377933.954

 

 

 

Vessel Specification

 

Details of the vessel MCS Swath1 can be seen via the following document.

 

https://www.maritimecraft.co.uk/files/MCS-SWATH-1.pdf

 

According to information in the specification, a deck crane of load 500 kgs is installed. The crane and a mobile winch will be used to deploy and retrieve sound recording equipment.

 

 

 

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Surface laid cable - Havhingsten, Eastern Irish Sea

It is advised that extra care is taken when operating near these areas and that no vessel should trawl within 250m from the Western HVDC crossing, and within 450m from the Hibernia crossing. Burial & rock placement works are planned for early Q2 2021.

Please be advised that, installation of the Havhingsten fibre optic telecommunication cable system is almost complete in the Eastern Irish Sea.

 

The supplier of the Havhingsten cable is Alcatel Submarine Networks (ASN). Intertek are the environmental and permitting consultants.

The entire cable system will comprise marine elements that pass from Denmark to the UK (NE region); from the UK (NW) to the Republic of Ireland; with two segments being installed into landfalls on the Isle of Man. 

 

Installation was via industry standard burial tools including water jetting and ploughing. Cable burial has been performed to a target of 1.5m.

 

The Havhingsten cable crosses 2 existing assets within the Eastern Irish Sea, 1 of which is a power cable which will require external rock protection (Western HVDC link). Post-rock installation is now expected in Q2 2021. The power cable crossing is located approximately 50km offshore, see Figure below.

 

Prior to rock placement there is a maximum of 25m of cable surface laid with Uraduct protection either side of the Western HVDC crossing. Coordinates of the crossing are provided in the table below. It is advised that extra care is taken when vessels are operating near the area and that no vessel should trawl within 250m from the listed coordinates.

 

Crossing

Approximate distance offshore (km)

Latitude

Longitude

Western HVDC Link

50

53°45.9867’ N

003°48.9137’ W

 

Prior to Post-Lay Inspection and Burial (PLIB) works, there is a maximum of 255m of cable surface laid either side of the Hibernia/GTT fibre optic cable crossing. PLIB works at the crossing are planned in early Q2 2021. Coordinates of the crossing are provided in the table below. It is advised that extra care is taken when vessels are operating near the area and that no vessel should trawl within 450m from the listed coordinates.

 

Crossing

Approximate distance offshore (km)

Latitude

Longitude

Hibernia/GTT

23

53°45.0048’ N

003°24.2761’ W

 

A guard vessel (the Silver Harvester) will be on location at both crossings once a week to notify vessels in the vicinity of the areas of surface laid cable.

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Maersk Highlander at Elgin WHP B

The jack-up rig Maersk Highlander is alongside Elgin WHP B – within 500m zone for the next 6 months (approximately)

The jack-up rig Maersk Highlander is alongside Elgin WHP B  – within 500m zone for the next 6 moths (approximately)

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Suspended Wellhead - Tolmount Main NE 42/28d-16

There is a new suspended wellhead on the seabed. These can be up to 4 metres high, they are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Suspended Wellhead - Tolmount Main SW 42/28d-17

There is a new suspended wellhead on the seabed. These can be up to 4 metres high, they are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Suspended Wellhead - Tolmount Main SE 42/28d-18

There is a new suspended wellhead on the seabed. These can be up to 4 metres high, they are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Survey - East Anglia HUB Offshore Wind Farm

Scottish Power Renewables (SPR) has contracted Fugro GM Marine Limited (Fugro) to carry out a geophysical and geotechnical site investigation located east of Lowestoft, in the southern North for the proposed East Anglia HUB offshore windfarm site.

The East Anglia HUB offshore windfarm site is split onto three zones: East Anglia ONE North (EA1N); East Anglia TWO (EA2); and East Anglia THREE (EA3).  In 2021, Fugro will be initially operating in EA1N only with operations commencing on 5th February 2021, with operations in EA2 and EA3 commencing subsequently.

 

This Notice to Mariners will be updated and reissued periodically as additional vessels are planned to come on site.  For operations in 2021, current planning indicates a total of 8 vessels being on site between the period 5th February and 18th August 2021. It should be noted these dates are subject to change and the total number of vessels could increase.

 

Vessel Call Sign Area Dates Duration
Fugro Venturer C6CG3 EA1N - OWF & ECC 05/02/21 8 Weeks
Fugro Frontier C6BH4 EA1N - OWF & ECC 12/04/21 3 Weeks
Fugro Frontier C6BH4 EA2 - OWF & ECC 01/04/21 9 Weeks
Fugro Frontier C6BH4 EA3 - OWF & ECC 11/03/21 3 Weeks

 

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Installation of Special Mark Buoys - Scarborough

Please be advised that we have installed 4 x Special Mark buoys at the boundaries of our aquaculture site. Each buoy is a yellow can shaped Special Mark fitted with a topmark, radar reflector and light (Fl.Y.5s).

Whilst the boundaries of the aquaculture site are lit, marked and charted, equipment deployed within these boundaries may be unlit and lying close to the surface.  Mariners are advised to exercise caution in the vicinity and to remain a safe distance outside the site boundaries. 

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North Hoyle Offshore Wind Farm - Exclusion Zone

Please be advised that RWE Renewables UK request that all vessels keep a minimum distance of 150m away from NH30 of North Hoyle Windfarm due to blade damage. Exclusion zone effective from 26/01/2021 and will remain in force until further notice

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Survey - Pipeline Survey TGT to LOGGS PP (Ref: 1170)

A 27 Day Pipeline Survey TGT to LOGGS PP. Using unmanned vessel X09 Call Sign: MHIJ8 from the 25th January - 31st March 2021

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

XOCEAN

X09

MHIJ8

N/A

16/02/2021 - 31/03/2021

For 5 Days

47, 48, 49

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Survey - Pipeline Survey TGT to Viking AR (Ref: 1172)

A 5 Day Pipeline Survey TGT to Viking AR. Using unmanned vessel X09 Call Sign: MHIJ8 from the 16th February - 31st March 2021

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

XOCEAN

X09

MHIJ8

N/A

16/02/2021 - 31/03/2021

For 5 Days

47, 48, 49

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Survey - Pipeline Survey LOGGS to Viking Bravo (Ref: 1174)

A 5 Day Pipeline Survey LOGGS to Viking Bravo. Using unmanned vessel X09 Call Sign: MHIJ8 from the 16th February - 31st March 2021

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

XOCEAN

X09

MHIJ8

N/A

16/02/2021 - 31/03/2021

For 5 Days

49

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Survey - Pipeline Survey TGT to LOGGS PP (Ref: 1173)

A 5 Day Pipeline Survey TGT to LOGGS PP. Using unmanned vessel X09 Call Sign: MHIJ8 from the 16th February - 31st March 2021

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

XOCEAN

X09

MHIJ8

N/A

16/02/2021 - 31/03/2021

For 5 Days

47, 48, 49

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Survey - Sub-bottom Profiling Vulcan UR & Vampire OD (Ref: 1175)

A 5 Day unmanned Sub-bottom profiling (SBP) will be used at the Vulcan UR and Vampire OD platform footprints to ascertain depth of burial of pile stubs & conductor stubs. Using unmanned vessel X09 Call Sign: MHIJ8 from the 16th February - 31st March 2021

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

XOCEAN

X09

MHIJ8

N/A

16/02/2021 - 31/03/2021

For 5 Days

49

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Rig - Valaris 122

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Scientific mooring deployments - West of Orkney and Thurso Bay

Partrac Ltd. Installed marine sensors at 3 sites over the period 15th to 17th October 2020. Following the marker coming adrift from Thurso Bay, the Instruments and moorings from Thurso, have been relocated to north of Dounreay

Sub-surface moorings will be deployed at three survey locations, each marked with a simple surface buoy positioned ~200m from the instrument location. A surface moored wave buoy will also be deployed at Survey point 5. The wave buoy is fitted with a 2m whip antenna, with a light sequence of Y.Fl.5(20s)

 

Having come adrfit, the instrument and mooring that had been deployed at East Thurso Bay, was relocated to the north of Dounreay

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Rig - Maersk Invincible

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Maersk Intrepid

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Rowan Stavanger

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Ensco 120

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - 590021

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Transocean Spitsbergen

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Valaris Gorilla VI

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Survey - Debris Clearance LOGGS,Vampire OD, Vulcan UR (Ref: 1169)

A 27 Day unmanned debris clearance survey of LOGGS,Vampire OD, Vulcan UR. Using unmanned vessel X09 Call Sign: MHIJ8 from the 19th January until 31st March 2021

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

XOCEAN

X09

MHIJ8

N/A

19/01/2021 - 31/03/2021

For 27 Days

47, 48, 49

 

There will be a debris clearance and bathymetry survey at the sites of two LOGGS satellite installations that were removed in 2019 and 2020, Vampire OD and Vulcan UR. In addition, there will be two pipeline length surveys (PL0027/PL0161 & PL2643/PL2644) and pipeline span surveys conducted at eight points along five pipeline / umbilical’s, within the LOGGS and Viking fields. An unmanned survey vessel will undertake these activities.

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Drilling Anchor Points - Jerv Prospect

Chrysaor Norge As are planning to drill the Jerv prospect on the Norwegian continental shelf, with the semi submerged drilling rig, COSL Innovator. Three (3) of the anchors and the belonging mooring lines will be placed on UK soil.

The Works shall comprise the installation of: three anchors and moorings of the COSL Innovator which cross the median line with Norway and extend into the UKCS.

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Lost CPT rod - Eastern Link 1

During CPT operations a CPT rod broke and was lost to the seabed. The rod is made of steel and is 3.6cm in diameter. It is estimated that 0.75m of rod is protruding above the seabed.

The cone and friction rod were also missing at recovery and are most likely curried under the seabed. These are also made of steel with the same diameter. The cone is 35cm long and the friction rod is 30cm long. 

 

There may be a minor risk to trawler’s fishing gear if they trawl over this location, however, it is more likely that any trawling gear would break the rod below the seabed.

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Survey - Proposed Drilling Survey Diadem Well (Ref: 1166)

A 6 Day proposed drilling survey of the Diadem Well. Using Vessels Fugro Galaxy Call Sign: C6YY4 & Fugro Synergy Call Sign: C6XR3 from the 18th January until 01th June 2021

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Fugro GB North Marine Ltd

Fugro Galaxy

C6YY4

Fugro Synergy

C6XR3

700m

3m

18/01/2021 - 30/06/2021

For 6 Days

22

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Rig - Rowan Viking

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Ocean Endeavor

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Triton Knoll Offshore Wind Farm - Navigation Warning

Mariners are advised that the remnants of a Wave Rider Buoy sinker weight and partial rigging are located within the Triton Knoll Offshore Wind Farm Construction site.

Mariners are advised that the remnants of a Wave Rider Buoy sinker weight and partial rigging remain in position at:

 

Latitude Longitude Water Depth (LAT)
53° 30.442N 000° 50.564E 19.7m

 

It is advised that the partial rigging could potentially be floating up to 9.7m above the seabed, reducing the navigable safe water in the immediate area to 10m LAT.  Mariners are advised to avoid the indicated position by 250 metres.

 

Possible Dangers to Navigation Properties of the polypropylene show that the rope is buoyant, this makes the line sensitive for thruster currents. Taking the site water depth into consideration (19.7m LAT) and the maximum expected height above seabed of the rope 9.7m the line is expected to be floating submerged at approximately -10m LAT. In addition, it is noted that over time sediments will be trapped between the fibres and the heavier rope may finally sink. The polypropylene rope may impose a risk to foul propellers/propulsion of vessels due to the buoyant nature of the rope. As the rope is submerged at a depth of ~-10m LAT the risk is considered minimum for vessels with a shallow draught (<5m) and medium for a vessel with a deeper draught (>5m). Over time sediments will be trapped between the fibres and the heavier rope may finally sink thereby reducing the risk to propellers/propulsion of vessels. The clump weight itself (chain) is expected to have sunk into the seabed and has no significant height above seabed. In addition, the edges of the clump weight are mostly rounded (chain), the risk the clump weigh imposes to fishing activities/gear is therefore considered to be minimal.

***Note *** Application of Triton Knoll Wind Farm Safety Zones During Construction The Secretary of State has granted the Application of Safety Zones on the Triton Knoll Wind Farm Project as follows:

 

  • 500m “rolling” safety zones around any structure where construction is being undertaken (as indicated by the presence of construction vessels).

 

  • 50m pre-commissioning safety zones surrounding partial structures or completed structures prior to commissioning.
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Pile Installation - Penguins Field

A number of items will be left installed/wet stored on the seabed around the Penguins Field. Pile Fast Frame (together with pile stick-up) 8 x piles (completed with multiple clay protrusions/blocks) 9 x chains (210m long, 177mm diameter).

Details of Seabed - West Cluster

Pile No Location Clay plugs at pile location
1 61°35.020'N    01°31.070'E  1.30m height x 2.5 dia.
2 61°34.990'N    01°31.070'E 2.00m height x 2.5 dia.
3 61°35.020'N    01°31.060'E 1.50m height x 2.5 dia.
4 61°35.050'N    01°31.070'E 1.50m height x 2.5 dia.

Note: 210m of 177mm dia. chain has been laid on seabed at each location towards the FPSO centre.

 

Details of Seabed - North East Cluster

Pile No Location Clay plugs at pile location
5 61°35.550'N    01°33.430'E 1.30m height x 2.5 dia.
6 61°35.540'N    01°33.470'E 2.00m height x 2.5 dia.
7 61°35.520'N    01°33.510'E 1.50m height x 2.5 dia.
8 61°35.510'N    01°33.550'E 1.50m height x 2.5 dia.

Note: 210m of 177mm dia. chain has been laid on seabed at each location towards the FPSO centre.

 

Details of Seabed - Southern Cluster

Pile No Location Comments
9 61°34.450'N    01°33.500'E

Fast frame is currently located at pile location 9 (11.85m x 11.70m x 30m

Note: 30m pile is installed in this fast frame

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Leadon Area – Possible Trawl Hazards

Six small structures (approx. 0.5m high x 1.5m long and 0.6m across) were located on the top of the disused Leadon Bundles in UKCS Block 9/14. These small structures are located at the points listed.

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Topsides and Jacket Removal - Brent Alpha Platform

Brent Alpha Platform (topsides and jacket) have been removed. The Jacket footings protrude 55.24m metres above the seabed. There is no longer a Safety Zone around the Brent Alpha remaining structure.

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Decommissioning - Ninian Platform

Two cardinal buoys in proximity to Ninian North Platform, after removal of platform topsides (and associated navaids) in 2020.

West cardinal buoy (Fl. Q. (9). 15s), including ground tackle, with 400m excursion radius. Buoy fitted with AIS.

East cardinal buoy (Fl. Q. (3). 10s), including ground tackle, with 400m excursion radius. Buoy fitted with AIS.

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Completion of Explosive Ordnance - Hornsea Project Two

Mariners are advised that the Explosive Ordnance Detonation (EOD) phase for the pre-construction stage of Hornsea Project Two is now completed.

Hornsea Project Two confirms the presence of 7 Unexploded Ordnance (cUXO) and 2 suspected UXO (sUXO) which remain undetonated within the Hornsea Project Two Wind Farm area. There are no plans to clear these remaining UXO.

All vessels are requested to maintain the required safe distances as defined from the coordinates

 

It should be noted that ongoing seabed preparation for construction, as well as construction activities themselves, may identify further UXO which may need to be cleared from the site. Separate notices will be issued in this case.

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Unexploded Ordnance

Two items of debris identified as WW2 unexploded ordnance

The as-built survey of the Mariner 6" Gas Import pipeline showed two items of debris that were later identified as WW2 unexploded ordnance.

 

The UXOs posses no immediate threat to the burried pipeline. 

 

Plans are being reviewed to arrange for safe removal and destruction/disposal.

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Dropped drill pipe and collars (2,300kg / 33 metres)

Fugro has reported the loss of 33 metres of drill pipe, weighing a total of 2300kg from the MV Normand Flower whilst working on East Anglia 1 North wind farm. It is not known whether the item is sticking up above the seabed at this stage.

Dimensions of object: ~33 m of steel drill string consisting of: 4 X Drill Collars (each ~4.5 m long, ~8 inch diameter and ~500 kg in weight) 1 X API Drill String ~9 m long, 4.5 inch diameter and ~300kg weight

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Ninian North jacket

Top of Ninian North jacket 6m above sea level - no navaids or lights

The topsides has been removed from the Ninian North installation, leaving the jacket structure still in place. The top of the structure is approximately 6 metres above sea level. With the removal of the topsides, the remaining jacket structure is unlit and is not fitted with any navaids; cardinal buoys are located to the East & West.

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Buzzard Field - unconnected subsea infrastructure

Drilling activity in the Buzzard Field will cease for 2020 in September leaving 4 x Xmas Trees and 2 x wellhead conductors unconnected in the field until the subsequent subsea campaign in 2021. The locations are in the table below.

Subsea structure

Manifold Slot

Coordinates ED50

Protection structure

PN1

57° 50' 44.150" N

000° 54' 35.320" W

Xmas Tree

PN3

57° 50' 42.899" N

000° 54' 34.214" W

Protection structure

PN5

57° 50' 44.988" N

000° 54' 38.071" W

Xmas Tree

PN7

57° 50' 45.401" N

000° 54' 36.426" W

Xmas Tree

IN1

57° 50' 45.817" N

000° 54' 34.780" W

Xmas Tree

IN2

57° 50' 43.312" N

000° 54' 32.569" W

 

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Dropped Anchor - Gwynt y Mor Offshore Wind Farm

The original anchor consisting of approximately 350kg of scrap chain at the previously as laid position:53°28.615 N 003°30.192 W could not be recovered and remains on the sea bed.

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Exposed Cable - Tampnet Fibre Optic Cable - Penguins (UK) - Snorre A (NOR)

Please be advised that the installation of the Tampnet fibre optic cable is still ongoing and that there is currently approximately 4.5km of EXPOSED CABLE on the seabed. We advise all seafarers and fishermen to keep clear of using any bottom equipment.

Please be advised that the installation of the Tampnet fibre optic cable is still ongoing and that there is currently approximately 4.5km of EXPOSED CABLE on the seabed as per attached drawing. We advise all seafarers and fishermen to keep clear of using any bottom equipment that might interact and damage the cable in vincinity of the route. We are also broadcasting and raising awareness from land and nearby guard vessels to all fishermen approaching the cable route. The installation is expected to be ongoing until mid September. 

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Exposed Cable - Beatrice Offshore Windfarm

Rock Replacement Operations on a short area (4m) of partial exposure of Export Cable EC2 is in the vicinity of the mid cable joint at the location where the cable changes direction. Vessel MV Olympic Artemis Call sign: LAFV8. Work Commencement date TBC.

ROn behalf of Beatrice Offshore Windfarm Ltd, MV Olympic Artemis Call sign: LAFV8 will deploy rock bags over a four-metre section of exposed export cable.

 

Work Commencement date TBC.

 

During this operation the MV Olympic Artemis will be restricted in its ability to manoeuvre and will be displaying the appropriate lights and day signals. All vessels are there for requested to give a wide berth when passing.

 

At present the MFV Reaper is acting as a guard vessel at this location, further information is available in previously issued Beatrice notice to mariners NTM-BE-00005 - Export Cable Guard Vessel. MFV Reaper will remain on location throughout operations until the partial exposure has been proven to be satisfactorily covered.

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Relocated Unexploded Ordnance - Neart na Gaoithe Offshore Wind Farm

Following unsuccessful clearance activities at some of the confirmed Unexploded Ordnance (UXO) items, six UXOs have been relocated to date within the Neart na Gaoithe (NnG) Offshore Wind Farm and Export Cable Corridor.

These UXO items either do not contain a fuse or are confirmed as solid shots and clearance by detonation is not likely to be possible. As such, relocation of the item is necessary. The item will be relocated to a position outwith the construction areas, but within the boundaries of the NnG licensed area, as permitted by the Marine Licence.

 

Latitude Longitude Target
56°14.752’N 02°18.472’W G_MAG_0029
56°14.760’N 02°18.474’W G_MAG_0010
56°14.154’N 02°14.886’W E_MAG_0683
56°13.677’N 02°18.681’W ERC_O_MAG_0332_A
56°14.955’N 02°17.445’W E_MAG_0068
56°14.953’N 02°17.437’W E_MAG_0070
56°14.607’N 02°17.618’W E_MAG_0036
56°15.399’N 02°19.521’W G_MAG_0109
56°14.766'N 02°17.025’W E_MAG_0227
56°14.131’N 02°18.011’W E_MAG_0008
56°14.568’N 02°18.617’W E_MAG_0018
56°15.875’N 02°14.986’W C_MAG_0070
56°13.739’N 02°18.685’W ECR_O_MAG_0362_A
56°13.784’N 02°18.671’W ECR_O_MAG_0378
56°02.740’N 02°21.208’W ECR_M_MAG_0708
56°17.788’N 02°16.833’W B_MAG_0200

 

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Dropped Mattress - Shell 34" Pipeline

The 6th mattress for the Shell 34” pipeline will be recovered between 14th November - 31st January 2021 by the Seven Falcon. The Fleximat dimensions are 6.4m x 3.0m x 0.5m Weight in Air 15860kg.

During overboarding of the 6th mattress for the Shell 34” pipeline, the crane wire parted when the matt was entering the splash zone at approx. 25m above seabed. The Fleximat dimensions are 6.4m x 3.0m x 0.5m Weight in Air 15860kg.

 

The mat was being overboarded 15m away from the 34” pipeline, the mattress and frame landed on the seabed 6m away from the 34” pipeline

  • Fleximat 6.4x3.0x0.5m 2.4 & 3.2te/m3 Concrete Mattress – Weight in Air 15860kg
  • Mattress Lift frame – 6.3x2.4m – Weight in Air 1.7te
  • Approx. 25m Crane wire
  • 0.5t Crane Block

25m Crane wire and 0.5te Crane Block safely recovered 13:50, 08/09/20.

 

Plan is to recover mattress but inspections into the current state of the mattress are required to determine a suitable recovery methodology.

 

A marine licence (ML/634) application has been submitted and approved by BEIS,  A variation to extend the marine licence to 14th November 2020 was approved by BEIS on 2nd November, and a second variation for extension to 31st January 2021 is now pending with BEIS.  This is due to scheduling delays due to poor weather.  The mattress frame and mattress will now be recovered by the Seven Falcon offshore support vessel.

 

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Cable Repair - GTT Segment C

Following cable repair, cable exposed due rocky seabed conditions GTT Guard vessel is patrolling the area to promote awareness of the hazard to fisheries

Notice to fisheries and seabed users in the Irish Sea:

 

Please be advised that following a recent cable repair to the GTT (Hibernia) Segment ‘C’ between Southport and Dublin, the cable has been deployed as follows:

 

Initial Splice:        53° 48.3613’N    04° 30.1514’W

Standing bight:   53° 48.2208’N    04° 29.4494’W

Final Splice:         53° 48.1279’N    04° 28.2360’W

 

It should be noted that throughout the extent of the cable repair, despite repeated attempts at post lay burial by an ROV, the predominantly very rocky seabed has meant that cable burial and hence protection has not been possible.

 

It should also be noted that at the position of the ‘standing bight’ the cable is standing upright from the seabed at a height of 0.4 metres, with a length over the ground of 2.0 metres.

 

All seabed users are requested not to deploy equipment which engages with the seabed in this area, to avoid snagging of the cable and particularly so, at the standing bight area.

 

In case of any issues, please do not hesitate to contact the GTT Hibernia emergency contact number on: +353 1 867 3600 Option 2

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Exposed Pipelines - Scott Field

Pipelines in CNOOC’s Scott field have experienced upheaval bucking. As a result, in three locations, pipelines are now exposed and present a significant snagging hazard. Sea users are strongly advised to avoid these locations.

Detailed below, to avoid hazardous interaction with these sections of exposed pipeline, pending the execution of mitigation works.

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Dropped Object - Hornsea Two Offshore Wind Farm

Noise monitoring frame(steel 1m3 frame approx. 40kg), hydrophone,riser buoy,clumped(100kg chain clump weight) & 50m Dyneema riser line(dia.~25 mm)remain after the riser line was severed below the surface buoy.Surface marker buoy and pellet buoy recovered.

The riser line was severed below the surface buoy and it has not been possible to recover the items. Investigations as to the cause of the loss are ongoing.

 

Possible risk of entanglement from remaining riser line.

 

The SONAR imagery acquired during the recovery attempt indicated the riser line (the main aspect of concern) to be still attached to the anchor weight and suspended in the lower part of the water column. Given the elapsed time, the line will be fully saturated and neutrally buoyant and fully submerged. It is anticipated that the action of tidal currents on the line will cause it to knock down and eventually become entangled in the frame and other gear. Whilst it has not been confirmed, it is unlikely that the line would remain close to the surface.

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Rig Move - Askepott

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig Move - Maersk Inspirer

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Ocean Patriot

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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WTG Installation and Commissioning - Moray East Windfarm

WTG Installation and Commissioning installation on the Moray East windfarm

Please be advised that Moray Offshore Windfarm (East) shall commence WTG installation on the previously installed jackets (Figure 2). WTG’s will be installed by the JUV Bold Tern. Once the WTG’s have been installed Acta Centaurus will transfer teams of technicians using a walk to work system to carry out commissioning works in readiness for energisation. Acta Centaurus will be supported by 2 CTV’s (HST Harri and Windcat 40). Installation and commissioning works will commence circa 05th January 2021 until completion

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Dogger Bank A&B Landfall HDD Pilot Drilling

The offshore export cables, which will run from the offshore substation platforms (OSP’s) to the landfall, are 191 km in length for Dogger Bank A and 172 km for Dogger Bank B. These cables come ashore to the north of Ulrome on the Holderness Coast.

The main DBA and DBB landfall HDD pilot drilling will commence beyond the MHWS location from the 4th January 2021. A survey will then be carried out once each of the pilot drills has punched out onto sea bed to confirm accurate drill positions. The first survey is expected to be around 6th February subject to drilling progress.

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Survey - Alexandra, Victor Debris Clearance (Ref: 1164)

A 5 Day Gardline Alexandra, Victor Debris Clearance Survey. Using Vessel MV Ocean Reliance Call Sign: HP6391 From the 15th January until 31st July 2021

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Gardline Limited

MV Ocean Reliance

HP6391

N/A

15/01/2021 - 31/07/2021

For 2 Days

49

44

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Survey - Millom West & Calder Debris Clearance (Ref: 1165)

A 2 Day Gardline Millom West & Calder Debris Clearance Survey. Using Vessel MV Ocean Reliance Call Sign: HP6391 From the 15th January until 31st July 2021

Company Vessels

Towed Cable

Length & Depth

Duration Survey Block

Gardline Limited

MV Ocean Reliance

HP6391

N/A

15/01/2021 - 31/07/2021

For 2 Days

110

113

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Marine aggregate sampling survey - Area 481

Tarmac Marine Ltd and Van Oord UK Ltd are planning to undertake a vibrocore sampling survey in and around the marine aggregate dredging Area 481 in the Humber region.

The survey will involve a survey boat deploying a vibrocorer to retrieve seabed samples in and around Area 481.  

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Deployment of Buoys - Hornsea Project Two

Ørsted have relocated a 'measurement buoy', as well as two 'transponder buckets' as part of construction of the Hornsea Project Two Offshore Wind Farm.

The devices have been placed within the Order Limits of the Hornsea Project Two offshore wind farm.

 

Note that these devices will remain on location throughout construction of the Hornsea Project Two Offshore Wind Farm and mariners should take note of their presence.

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Rig - Transocean Equinox

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Wreck - Joanna C

Marine Accident Investigation Branch (MAIB) hereby PROHIBITS access to and/or interference with the wreck of fishing vessel Joanna C or its equipment and GIVES DIRECTION requiring that the same shall be left undisturbed until further notice.

Specifically prohibited are: anchoring in the vicinity of the wreck, fishing by nets, trawls or lines in the vicinity of the wreck, and any diving operations on the wreck or its outlying gear. For the purposes of this direction, the vicinity of the wreck shall be taken to be a circle, radius 200 metres, centred on the wreck’s location.

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Lidar Deployment - East Anglia Two Wind Farm

SeaWatch LiDAR Buoy (SWLB) has now been redeployed at the East Anglia TWO wind farm site. The SWLB is a sea state measurement instrument. The buoy has been recovered from site leaving some mooring components and the anchor weight on the seabed.

The equipment was deployed by the vessel Afon Wen on 28 November 2020. Grappling operations were also conducted on site and the majority of an old mooring remaining on the site were recovered from the location; the only remaining items on the seabed are an anchor weight, a short length of chain and approximately 10 m of dyneema rope. No further scheduled maintenance is planned on this project, although unforeseen maintenance may be required.

The mooring design is specific to each SWLB deployment and location. The equipment is moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.

The equipment is deployed within the East Anglia TWO wind farm array limits and will be deployed for approximately twelve months from July 2020.

 

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Suspended Wellhead - 47/09b-5

Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Suspended Wellhead - 16/06a-V2

Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Suspended Wellhead - 16/02b-5

Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Suspended Wellhead - 9/19b-29A

Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Suspended Wellhead - 9/19b-29

Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Suspended Wellhead - 9/19b-28z

Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Suspended Wellhead - 9/19b-28

Suspended Wellheads are not protected by 500m Safety Zones and are not required to have an overtrawlable protection structure.

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Rig Movement - Paul B Lloyd Junior

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.

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Deployment of Buoys - Outer Hebrides

Scottish Association for Marine Science (SAMS) has deployed ten moorings off of the Outer Hebrides in Scotland’s Atlantic Frontier. Moorings will be deployed at the ten locations until October 2021.

The moorings have been deployed as part of a European Maritime and Fisheries Fund project on behalf of Marine Scotland Science, and carry research equipment that records underwater noise and the echolocation clicks of marine mammals.

 

All moorings are sub-surface and extend no more than 6 metres vertically from the seabed. There is more than 50 metres clearance to the surface above every mooring.

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Wreck - H17 Wreck Archaeological Exclusion Zone

A known wreck lying to the south of London Array WTG H17 has become exposed. An archaeological Exclusion Zone (AEZ) already exists to protect this known wreck. Marine users are requested to maintain a safe distance around this wreck and current AEZ.

Further surveys are planned in 2021

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Dropped Boulders (~3 tonnes each)

In addition to the reported 15x boulder positions from 21 September, we have been informed of a further 19x boulders that have been dropped from the vessel 'Esperanza' in the Dogger Bank area. It is estimated these may be laying ~1m above the seabed.

These boulders have seemingly been deployed in groups at different times, with notification via the UKHO.

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Drilling - Glengorm Appraisal Campaign

The Borr Prospector 5 Heavy Duty Jack Up Rig will be positioned at the Glengorm South appraisal well location 22/26d-C.

The Borr Prospector 5 Heavy Duty Jack Up Rig will be positioned at the Glengorm South appraisal well location 22/26d-C.The rig will remain on location for approximately 216 days before departing to the second appraisal well location on Glengorm, well 22/21c-C.

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Rig - West Mira

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Rig - Valaris 123

Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.

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Deployment of oceanographic sensors - Dee Estuary

Oceanographic sensors will be deployed for a period of 12 months at 4 locations at the mouth and to the north of the Dee Estuary.

Oceanographic sensors will be deployed for a period of 12 months at 4 locations at the mouth and to the north of the Dee Estuary. The sensors will be deployed in early November 2020 using the Port of Mostyn workboat, Eileen. Each location will be marked by a yellow surface buoy with a yellow 'X' topmark and will be lit with characteristics Fl.Y.(5)20s.

 

A 50m exclusion is requested from the marker buoy. Each location will be visited at 3 month intervals for mooring maintenence, using the Port of Mostyn workboat, Eileen.

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ADCP deployment on the seabed - Loch Carron

Deployment of Scientific Acoustic Doppler Current Profiler on the seabed with no surface markers

We intend to deploy a scientific acoustic doppler current profiler on the seabed in outer Loch Carron, with no surface markers.

 

Location: 57°21.43'N  005°40.41'W

Water depth around 50 m

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Anchor Weight Chain 800kg - East Anglia One

There is most likely an anchor weight remaining on site. This is a bundle of approx. 800kg scrap anchor chain. Dimensions of object: Wave buoy mooring consisting: Anchor chain bundle: approx. 1.5 m x 2 m x 1 m

There is likely <0.5m presence of the anchor at the seabed so no risk to navigation is perceived.

 

There is a small potential for entanglement with fishing gear should trawling be undertaken in the area should equipment remain on seabed surface. No navigational risks are perceived.

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Havhingsten Cable Project - North Sea

Prior to rock placement there is a maximum of 50m of cable surface laid at each of the 4 crossings. It is advised that extra care is taken when vessels are operating near these areas and that no vessel should trawl within 250m from.

Please be advised that, installation of the Havhingsten fibre optic telecommunication cable system is complete outside of 12nm within the North Sea and at the Seaton Sluice landing. The Whitley Bay stub works are scheduled for March 2021.

 

The supplier of the Havhingsten cable is Alcatel Submarine Networks (ASN). Intertek are the environmental and permitting consultants.

 

The entire cable system will comprise marine elements that pass from Denmark to the UK (NE region); from the UK (NW) to the Republic of Ireland; with two segments being installed into landfalls on the Isle of Man. 

 

The cable route in the NE region is shown below. Landfall was made at Seaton Sluice.

 

Installation was via industry standard burial tools including water jetting and ploughing. Cable burial has been performed to a target of 2m.

 

The Havhingsten cable crosses 4 pipelines within the UK North Sea, which will require external rock protection. Post-rock installation is now expected in March 2021. The cable crossings start at approximately 72km offshore and beyond.

 

Prior to rock placement there is a maximum of 50m of cable surface laid with Uraduct protection at each of the 4 crossings. Coordinates of the crossings are provided in the table below. It is advised that extra care is taken when vessels are operating near these areas and that no vessel should trawl within 250m from the listed coordinates.

Crossing

Approximate distance offshore (km)

Latitude

Longitude

CATS

72

55°15.8028’ N

000°21.9318’ W

Norpipe

113

55° 19.1679’ N

000° 16.0266’ E

Sleipner to Easington

140

55° 22.3375’ N

000° 40.9323’ E

Shearwater to Bacton

198

55° 30.7194’ N

001° 34.1236’ E

 

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Dropped Anchor Weight and Mooring

Anchor weight and mooring from lidar buoy, composed of approx 2250 kg scrap anchor chain, 19mm chain, 20 mm dyneema rope. Dimensions of object: Approx. 2.5 m2 (w) and 1 m height.

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Construction of Wind Farm (Neart na Gaoithe)

Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) will commence construction work for Neart na Gaoithe (NnG) Offshore Wind Farm, from the 9th August 2020, with the start of casing and pile installation operations on the wind farm site.

NnGOWL is developing the NnG Offshore Wind Farm, jointly owned by EDF Renewables and ESB, which is located in the outer Firth of Forth, Scotland. The NnG wind farm area is 15 km east off Fife Ness and 29 km from the East Lothian coastline and covers an area of 105 km2

The wind farm consists of 54 no. wind turbines (WTGs) and 2 no. Offshore Substation Platforms (OSPs), with a total capacity of approximately 45 0MW. Water depths across the offshore wind farm area generally range from 40 to 60 m below LAT. The generated power will be transmitted to the grid via two subsea export cable circuits which will reach landfall at Thorntonloch Beach, East Lothian, Scotland. Specific details and location of activities within the Wind Farm Area and Export Cable Corridor will be provided via subsequent notices as work progresses.

 

Buoyage

 

Five special markers are now in position:

 

Name Location

SP 1 - Special Mark - Fl Y 5s light character

56°18.180'N 02°12.075'W

SP 2 - Special Mark - Fl Y 5s light character

56°15.643'N 02°09.329'W

SP 3 - Special Mark - Fl Y 5s light character

56°12.294'N 02°15.796'W

SP 4 - Special Mark - Fl Y 5s light character

56°14.038'N 02°18.975'W

SP 5 - Special Mark - Fl Y 5s light character

56°18.924'N 02°18.951'W

 

Four cardinal buoys are due to be deployed the week commencing 16th March. Planned deployment locations

 

Name Location

NNG - North Cardinal - Quick (Q) white light character

56°20.425'N 02°14.617'W

NNG - East Cardinal - Q (3) 10 s white light character

56°14.329'N 02°08.558'W

NNG - South Cardinal - Q (6) + Long (L) FL 15 s white light character

56°12.294'N 02°09.760'W

NNG - West Cardinal - Q (9) 15 s white light character

56°17.057'N 02°21.084'W

 

A steel chain will be connected to each marker buoy, and the chain will be present through the water column, connected to an anchor placed on the seabed.

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Deployment of Buoy - Neart na Gaoithe Offshore Wind Farm

Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) successfully deployed a Wave Rider Buoy (WRB) within the Wind Farm Area on 12th Sept 2020. The intention is that this buoy will remain in situ within the NnG Wind Farm site for up to 2 years (Sept 2022)

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Dropped Cylindrical Pipe

Material is smooth cylindrical pipe drill casing. Dimensions of object: 12.2m x 0.2m presumed to be laying horizontal / sub-horizontal on the sea bed. May present some ‘snagging’ risk to fishing gear or similar. Planned Recovery of Item.

Details of any radio Navigational Warnings and/or Notices to Mariner’s:

 

  • None as yet, but geotechnical spread remains at site and in a position to guard and notify as required.
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Dropped Large Anchor

A large anchor has been dropped to the seabed by the fishing vessel 'Benarkle' (PD400). The anchor is approximately 3nm SSE of the Ninian South platform.

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Floating LiDAR System - Seagreen Alpha and Bravo windfarms

Seagreen Wind Energy Limited has replaced the Floating LiDAR System (FLS) at the location shown

The replacement FLS was deployed on the boundary of the Seagreen Alpha and Seagreen Bravo offshore wind farms in the Firth of Forth Offshore Wind Round 3 Zone off the east coast of Scotland. The replacement FLS is approximately 600m to the south-west of the previous location.

 

The FLS buoy will remain deployed for up to 1 additional year from this date. Service visits will occur at approximately 3-month intervals over this period.

 

The FLS is buoy mounted and is moored using 150 m long DIN 5683-II mooring chain Ø26 x 234 mm and 3 tonne concrete anchor. The buoy is powered by solar panels and micro wind turbine generators. The buoy is yellow (RAL 1023) in colour and will be clearly marked with two navigation lights (flashing amber, 5 flashes every 20 seconds, nominal range 3-6 nm visibility). The buoy is fitted with a Radar reflector. A service vessel will be on station for approximately four hours during service and recovery visits. Other vessels should maintain a safe distance when passing the vessel and should pass at lowest possible speed to avoid vessel wash effects.

 

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Wet Storage of Caisson Sections - Bruce 500m Safety Zone

Caisson Wet Storage Location

The wet storage area will, when complete, consist of eight by one tonne gabions with two sections of redundant caisson resting on them. The two caisson sections are 20 metres and 18.5 meters in length weighing 18.4 tonnes and 10.3 tonnes respectively. Six by one tonne gabions were placed on the seabed with the 20 meter section of caisson resting atop of them on the 12th of June 2020. The date when the second 18.5 meter section of caisson will be position in the wet storage area has not yet been determined. 

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Dropped Anchor

Trawler J. Bergvoll Call Sign: LLAJ had come fast to an anchor in Position: 61°32.500'N 001°33.200'E and was dropped in Position: 61°30.371'N 001°40.812'E . Trawl damaged.

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Drilling - Noble Sam Hartley Golden Eagle Infill

Noble Sam Hartley HDJU undertaking infill drilling from the Golden Eagle platform.

The Noble Sam Hartley will be positioned by wellhead platform 'W' from August 2020 for up to 1 year. The Noble Sam Hartley has three jack-up legs with spud cans to support and stabilise the rig on the seabed and is held in position by a 4-anchor mooring spread.  Once the rig is in position, the anchors and chains will be removed.

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Exposed Subsea Cable - Apollo South

On behalf of Apollo SCS Ltd, fishermen are advised that following a repair to the Apollo South subsea telecoms cable there now exists a section of exposed/unburied cable.

Due to the nature of the seabed in this area the cable may be exposed and could be a hazard to fishing. Fishermen are asked to ensure that they have the route of the Apollo South cable accurately plotted on their fishing charts. Trawler skippers are respectfully asked to exercise caution when trawling in the vicinity of the Apollo South cable and to keep beyond a distance of at least 500 metres from the charted cable route and, where at all possible, to avoid trawling directly over the cable route. Static gear fishermen are advised not to deploy anchors and end weights in close proximity to the cable.

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Clump Weight - Triton Knoll Offshore Windfarm

A 500kg clump weight made from scrapped anchor chains has been dropped

Dimensions of object:

  • Various lengths of anchor chain (max 1.3mtr)
  • Held together by steel sling and shackles
  • Total mass ±500kg
  • Connected is a white polyprop line - ± 25-30mtr in length with sinker at end.
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Fishing Hazard

Details of fishing hazard

A fishing vessel had to release a large clump of concrete back to the sea bed after having become snagged. The concrete clump could pose further risk to fishermen. The lump had broken into two parts.

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Deployment of Buoys - Neart na Gaoithe OWF

Neart na Gaoithe Offshore Wind Limited (NnGOWL) have completed the deployment of four Cardinal buoys around the Neart na Gaoithe Offshore Wind Farm site.

The marker buoys will remain in place until the construction of Neart na Gaoithe Offshore Wind Farm is complete.

 

Name Coordinates
NNG N - North Cardinal - Quick (Q) White light character 56°20.424'N 002°14.616'W
NNG E - East Cardinal - Q (3) 10s White light character 56°14.329'N 002°08.557'W
NNG S - South Cardinal - Q (6) + Long (L) FL 15s White light character 56°12.293'N 002°09.760'W
NNG W - West Cardinal - Q (9) 15s White light character 56°17.057'N 002°21.083'W

 

The buoys will be deployed for the duration of the construction of Neart na Gaoithe Offshore Wind Farm. The buoys will be inspected and maintained at least every 12 months.

 

There are currently two Guard Vessels present on site, which will be on site for the duration of the Neart na Gaoithe Offshore Wind Farm construction period. The guard vessel is either:

  • Artemis, call sign MVIX5;
  • Tranquillity S, call sign MJUH9 or
  • Seagull, call sign MVBO2.
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Pipeline Span - Dunbar to Alwyn: PL1043

Significant free-spans have been identified along the PL1043 Dunbar to Alwyn pipeline

Significant free-spans have been identified along the PL1043 Dunbar to Alwyn pipeline : Please exercise caution in these areas

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Plugged and Abandoned Well : Sween

Sween UKCS 3/30 : Abandoned Wellhead (3/30-7)

No overtrawlability trial done yet, rough ground may be experienced.

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MacCulloch Area – Location of Donan (Dumbaton/GP3) Gas Export Tie-In Skid

Post decommissioning of the MacCulloch FPSO / Field in UKCS Block 15/24, a Guard Vessel is no longer in position at the location of the Tie-In Skid at MacCulloch 

After the decommissioning of the MacCulloch FPSO / Field in UKCS Block 15/24, a Guard Vessel is no longer in position. 

 

The Donan (Dumbarton) Field, located in UKCS Block 15/20, has an out of use Gas Export pipeline (PL2324) which is still connected to a Tie-In Skid located within the previous MacCulloch subsea 500m zone. 

 

Please be aware that this subsea Tie-In Skid remains in place at this location.  The structure has been notified and recorded on the NDR / FishSafe websites since 2006/07, but has been previously monitored by the guard vessel.

 

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Plugged and Abandoned Well : Balvenie

Balvenie UKCS 3/14: Abandoned Wellhead (3/14d-18)

No overtrawlability trial done yet, rough ground may be experienced.

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Plugged and Abandoned Well : Alwyn South

Alwyn South UKCS 3/9 : Abandoned Wellhead (3/9a-11)

No overtrawlability trial done yet, rough ground may be experienced.

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Coils of Steel Rope - Neart Na Gaoithe Offshore Wind Farm

The Glomar Wave has discovered two seabed hazards, within the boundaries of the Neart na Gaoithe Export Cable Corridor. A 50-metre exclusion zone is requested around each of the following locations for safety reasons, until they can safely be removed.

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Freespans - Breagh Pipelines

Two freespans have been identified on the 20” gas export line (PL2768). Please exercise caution in this area.

Start Position End Position

Length (m)

Height  (m)

54°36.952'N 00°14.608'E 54°36.952'N 00°14.599'E 23.15 1.00
54°39.576'N 00°49.814'W 54°39.577'N 00°49.827'W 30.37 1.00

 

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Pipeline Span - PL3088, Cygnus Field

The PL3088 Cygnus Export Pipeline Span located ~21km South West of Neptune’s Cygnus Alpha Complex.

The PL3088 Cygnus Export Pipeline Span located ~21km South West of Neptune’s Cygnus Alpha Complex, as reported during the 2019 pipeline inspection campaign. The 29m span length and 0.26m span depth shown below could present a Hazard to Fishing.

 

Start Position End Position Length (m) Height (m)
54º27.672’N   02º01.612’E 54º27.664’N   02º01.589’E 29m 0.26m

 

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Exposed Cable Sections - EirGrid East West Interconnector

Following a recent marine survey along the route of the EirGrid East West Interconnector power cable, is was found that the cable is currently exposed at two locations within UK 12-mile territorial waters fishery limit off the North Wales coast.

In the interests of maritime safety, mariners/fishermen are advised not to anchor, trawl or deploy bottom contact fishing equipment in the vicinity of the EirGrid East West Interconnector power cable route and within the boundary box of the exposed cable sections as detailed.

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Breagh Pipelines - Exposed Fibre Optic Cable

The Breagh fibre optic cable (PL2770) is exposed on the seabed along various stages of the route between Redcar and the Breagh A platform.

A scallop dredger became snagged on an exposed section of the fibre optic cable in June 2019 causing serious damage to the fibre optic cable and subsequently had to abandon retrieval of his gear for safety reasons.  This notification is made to the fishermen, operating between Redcar and the Breagh A platform, to be advised that the fibre optic cable represents a serious snag risk to both scallop dredgers and static gear fishing in the vicinity of the line.

 

Fishermen are advised to stay away from the line to avoid the risk of becoming snagged on the unburied sections of cable.

 

Breagh Alpha Platform 54°35.693'N 000°25.926'E
IP1 54°36.372'N 000°24.471'E
IP2 54°37.462'N 000°06.365'W
IP3 54°38.642'N 000°40.856'W
IP4 54°39.893'N 000°55.992'W
IP5 54°37.757'N 001°04.765'W

 

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Cable spans

Surveys at Greater Gabbard show that there are 8 free-spans which are listed below.

Location

Span Length (m)

Span Height (cm)

Start of Span

End of Span

L1 cable

6

0

52° 12.284'N 001°39.364'E

52°12.283'N 001°39.369'E

L1 cable

8

13

52° 12.271'N 001°39.434'E

52°12.270'N 001°39.441'E

L1 cable

8

20

52° 12.064'N 001°40.559'E

52°12.061'N 001°40.565'E

L2 cable

15

5

52° 12.128'N 001°40.524'E

52°12.124'N 001°40.535'E

L2 cable

8

76

52° 12.119'N 001°40.560'E

52°12.118'N 001°40.567'E

L3 cable

3

11

52° 12.169'N 001°40.502'E

52°12.169'N 001°40.504'E

L3 cable

13

34

52° 12.148'N 001°40.594'E

52°12.146'N 001°40.604'E

L3 cable

17

10

51° 59.194'N 001°57.431'E

51°59.187'N 001°57.442'E

 

Whilst the results continue to be processed, Balfour Beatty have asked that in the interest of safety and the integrity of the cable, extreme caution be used when Fishing near the export cables and that Fishermen refrain from using towed gear across the export cables wherever possible.

 

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Exposed sections of cable

Surveys at Gunfleet Sands offshore wind farm have illustrated that some array/in-field cables are lying exposed on the seabed and are no longer buried and there is one freespan. These may represent a hazard to fishing.

These are the following cables located in the eastern part of Gunfleet Sands 1 and the north eastern part of Gunfleet Sands 2.

 

Location

Exposure Length (m)

Start of Exposure

End of Exposure

Between turbines C06-D06

4

51°44.447'N 01°15.045'E

51°44.445'N 01°15.046'E

Between turbines F06-F07

23.7

51°44.204'N 01°16.057'E

51°44.209'N 01°16.076'E

Between turbines F07-F08

78.4

51°44.471'N 01°16.744'E

51°44.448'N 01°16.688'E

Between turbines F08-F09

851.7

51°44.485'N 01°16.777'E

51°44.726'N 01°17.398'E

Between turbines G06-G07

21.7

51°44.008'N 01°16.270'E

51°44.002'N 01°16.255'E

Between turbines G07-G08

21.9

51°44.273'N 01°16.948'E

51°44.267'N 01°16.932'E

Between turbines G08-G09

20.7

51°44.276'N 01°16.953'E

51°44.280'N 01°16.969'E

Between turbines G08-G09

16.6

51°44.522'N 01°17.591'E

51°44.527'N 01°17.603'E

 

There is a freespan at the following array Cable Position:

 

Location

Exposure Length (m)

Start of Exposure

End of Exposure

Between turbines C06-D06

4

51°44.447'N 01°15.045'E

51°44.445'N 01°15.046'E

 

 

 

Type See detailed map on our bulletin website
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Exposed cable and lost fishing gear

Exposed section of cable and lost fishing gear.

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Exposed Cable Section (SHEFA)

There is an exposed section on the SHEFA cable coming out of Orkney between the two positions below.

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