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Please be advised that the AIS on the Inch Cape Offshore Met Mast is currently non-operational. The marine navigation lights,  foghorn, aviation lights and remain operational. This fault will be investigated and notification provided once the AIS is operational again. 

Mariners are advised that the following vessels continue to be active at the Triton Knoll Offshore Wind Farm as outlined within previously issued NtM's

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.

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)

NtM 006-2021 (16th April 2021)

NtM 007-2021 (18th May 2021)

Navigation Warning - 08th January 2021

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 at the following location;

53° 30.442N 000° 50.564E

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.

Navigation Warning - 16th March 2021

Mariners are 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.

Navigation Warning - 25th May 2021

Mariners are advised that during a Man Overboard Recovery drill a “Dead Fred Casualty” was subsequently lost, presumed sunk to the seabed in the following position;

Latitude - 53° 30.27’N

Longitude - 000°40.55’E

Water Depth – 79m LAT

If the object is recovered, please contact the following in the following order.

• Triton Knoll Marine Coordination Centre:
• Email – tkmcc@smchse.com
• Tel – 0045 82 13 62 19

• Lee Cornwell - External Consultant – Marine Operations
• Email - l.cornwell@tritonknoll.co.uk
• M: +44 (0)7384 807293

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Premier Oil are planning to undertake a cross asset inspection campaign using the Subsea 7 chartered MMA Pinnacle ROVSV. Fields to be inspected include; B-Block (encompassing Balmoral, Stirling, Glamis, Blair, Brenda and Nicol), Caledonia, Nelson, Huntington, Catcher (encompassing Burgman, Varadero and Wreck sites).

The survey will last 72 days in total, however each site to be surveyed will last 2-20 days, depending on the location and any operational delays e.g. weather.

The MMA Pinnacle has completed surveys at B-Blocks fields, Caledonia,  Nelson & Huntington. The vessel is currently located in the Catcher Area.

Start date: 1st May 2021 and end date of 7th August 2021

This safety zone may be new, or an amendment to an existing zone. It may also replace a safety zone in place around a platform, or other surface structure for the purposes of decommissioning.

Your FishSAFE Information will be updated in the next release.

This safety zone may be new, or an amendment to an existing zone. It may also replace a safety zone in place around a platform, or other surface structure for the purposes of decommissioning.

Your FishSAFE Information will be updated in the next release.

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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.

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 Services 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.)

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.  

(Please note that d/t limitations in the number of coordinates possible to submit in the online notice submission system, 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.)

The USV will be mobilised from Royal Norfolk & Suffolk Yacht Club, Lowestoft where it will transit to/from the area of operation. During the operation the USV will be performing a Hydrographic Survey of the area shown below

A support vessel “WM Poseidon” will escort the USV throughout the operations from the harbour entrance 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.

Although the vessel is uncrewed, it is managed throughout the 24hour operation piloted remotely using 360 degree cameras and other navigational aids.

Vessel Details:

• Name:       X-09 UNCREWED
• MMSI:        232027632
• Length:      4.5m
• Beam:       2.2m
• Speed:       3.5kts
• Draught:   1.0m

Tonnage:  750kg

The USV sends real time images and situational awareness data over satellite to a team of operators keeping watch and controlling the vessel remotely 24/7. Seafarers are asked to avoid contact with the vessel and be aware of the operational area during this perio

Cable lay and burial works of the HVDC installation are planned to take place from: • Cable lay 10th May –23rd June 2021 • Cable Burial 12th May – 30th July 2021

The route length of the main HVDC interconnection (2x bundles power cables + 1x Fibre Optic Cable) is in the order of 620km. The work covered by this NtM is covering the first campaign of 51km in length starting from the UK the landfall at Boygrift.

The Cable Lay works are being carried out by: Prysmian PowerLink using Cable Enterprise Call Sign 2FOV9. Supported by a tug Norne Call Sign PCJR.

The Cable burial works are being carried out by: Asso.subsea using Atalanti Call Sign 5BYY2 using the trenching tool AssoTrencher V and the Argo Call Sign 5BDF3 using the jetting tool AssoJet III and trenching tool AssoTrencher IV.

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 manoeuvrability as it completes its work scope.

Deployed Guard Vessels will monitor the exposed areas of cable while burial progresses and advise of safe distances locally.

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

Works overview Following completion of the landfall the Cable Laying vessel Cable Enterprise will surface lay the cable on the seabed along the HVDC cable route.

In periods while the cable is exposed on the seabed guard vessels will be stationed to monitor the cable and provide advice to mariners.

Cable Burial will follow soon after the cable lay operations carried out by two vessels Atalanti and Argo. Where cable burial is not possible (due to service crossings and / or where seabed conditions are unfavourable), guard vessels will remain on site.

Service crossing As part of the first campaign the Viking Link HVDC cable crosses 11 existing service. While awaiting the post lay protection operation, Guard vessels will remain in place to monitor the exposed cable.

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The ERDA will depart from the Amethyst C1D installation (UKCS 47/14) on 3rd July 2021 (earliest).

Please note: Amethyst C1D Jacket will remain in-situ with navigational aids installed on the jacket legs.

The ERDA will sail to Sagro Yard, Vlissingen in the Netherlands.

The journey is anticipated to take approximately 3 days, with the Jack-Up vessel due on location on 6th July 2021 (at the earliest).

Location co-ordinates (WGS84)

Amethyst C1D Platform Lat: 53° 38' 41.7738’ N Long: 00° 36' 08.2471"E

Sagro Yard, Netherlands: Lat: 51° 27.32’ N Long: 03°  40.33’ E

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.

The Jack up Barge HAEVA, will depart from Amethyst A1D (UKCS 47/14) and transit to the Lancelot Area Pipeline System (LAPS) field to the Galahad Installation, where it will commence HCF operations.

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The Seven Atlantic DSV will be mobilising to the Balmoral field on the 18th June for approximately three weeks to conduct preparatory works in preparation to remove the mid-water arches and rise bases. Additionally, the DSV will conduct diving works at the Nicol location. The vessel will mobilise and demobilise in Peterhead.

Mariners are requested to remain a distance of 50m2 away from the assets

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. 

As part of the Hywind Scotland Wind Park, Equinor has subcontracted Akvaplan-niva to perform a survey using an autonomous vehicle – Sailbuoy – in the park area. The Sailbuoy is only 2 meters long and weighs 60 kgs. It was deployed from Bergen on the 8th June and estimated arrival at Hywind Scotland is 29th June.

The Sailbuoy will have a pre-programmed mission plan, and will communicate to shore via satelittes. The Sailbuoy is driven by wind and sun, and the vehicle is equipped with solar panel and an echosounder as well as sensors for temperature, salinity and fluorescence.

The purpose of the study is to collect relevant data on fish in the Hywind Scotland area using instrumented glider. The method is expected to mainly give data on prevalence and biomass, and less information on biodiversity. The data gathering in Hywind Scotland will take approximately 30 days from arrival and completion is estimated around 29th July. After ended campaign in the wind park, the Sailbuoy returns back to Bergen for retrieval. The results from the glider campaign is important also for further technology development.

The Sailbuoy is collision and shock proven. It will be labelled with contact information.

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.

The operations are expected to be carried out in two periods, the first one from 29 May to 30th June 2021 and the second from July 26th until August 15th

However, please note the start date and the duration of the activity is weather dependant.

CS Responder will have stern deployed equipment and cable, and will be restricted in manoeuvrability. All vessels operating within this area are requested to keep their distance, maintaining at least the 500m safety zone around the vessel, and pass at minimum speed to reduce vessel wash.

Throughout operations, the vessel will be displaying the appropriate lights and shapes as required under the COLREGS Rule 27(b).

Update June 10:

A second attempt at retrieval of the sound recorder in Hywind Scotland Pilot Park will be made by end of August.

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.

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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.)

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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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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The boulder is positioned resting over a 20" Gas Export Pipeline. The boulder overhangs on one side of the pipeline, which represents a signficant snag hazard for fishing equipment. Additionally, given the size and weight of the boulder any further 3rd party interaction of the boulder presents a material and very signficant risk to the integrity of the pipeline. EnQuest are assessing options for making safe of this hazard.

EnQuest request that this location is avoided by all fishing activity until this hazard has been removed.

The equipment has been deposited at Wind Turbine Generator (WTG) location NNG-H17, within the boundaries of the Neart na Gaoithe (NnG) offshore wind farm area.

The equipment left in-situ reaches a maximum elevation of 38m above the seabed, which is approximately 12m below the level of Lowest Astronomical Tide (LAT).  There are low levels of third party vessel traffic within the boundaries of the wind farm, however, a Notice to Mariners has been issued advising of the seabed hazard, navigation warnings are being organised through UKHO, a guard vessel is at the location of the equipment and a 50m exclusion zone has been implemented.  Weather permitting, a guard vessel will remain at the location of the equipment, until recovery.  There is approximately 2.3m3 and 2.8m3 biodegradable oil encased within the equipment, however this is within a closed system and therefore will not leak whilst not operational. 

The deposit occurred during drilling and casing installation operations from the Saipem 7000 call sign: C6NO. The S7000 has departed the Neart na Gaoithe (NnG) offshore wind farm area, however the location of the item is marked by a Guard Vessel and an exclusion zone is implemented. Navigation warnings will be issued until the item is recovered.

Subsea Template (SST) to support and position the SSVBM Electro Hydraulic subsea template 41.335m (L) x 45.996m (W) x 15.698m (H) 1100t (in air) Lift rigging (dyneema), shackles and lift pots SST umbilical – Length = 160m

Subsea Vertical Boring Machine (SSVBM) Electro-Hydraulic subsea vertical boring machine which is within Active Tower 5 of the Subsea Template 65m (L) x 2.96m (Maximum diameter) 290t (in air) BHA umbilical – Length = 80m Feed umbilical – Length = 100m

During drilling operations below the seafloor the SSVBM became stuck within the drilled socket. Several attempts to recover the assets were made but with the limited options and equipment that were available offshore at the time this could not be achieved.

Recovery plans are being developed. It is currently expected further recovery attempts will be made between August and October 2021.

It should be noted that SSE Renewables are not requesting fishermen to relocate gear - on this occasion the vessel will work around any gear on location.

The ornithological surveys mobilised in July 2020. The expected completion of the ornithological surveys will be by end of June 2021, weather permitting, and therefore there may be the potential for an extension to the work duration.

The survey is to be split into a total of five surveys using the offshore survey vessel. These five surveys will be undertaken in separate spring / summer months between July 2020 and June 2021. The vessel will spend approx. 4-5 days at sea within the wind farm area during each survey.

During each survey campaign a total of eight 15km transects will be surveyed across the survey area.

Reserach vessel Prince Madog will be seabed sampling (grab, towed camera and beam trawl) and conducting multibeam surveys in the Point Lynas anchorage area and off south stack between 17th and 22nd of June around the Isle of Anglesey, North Wales. 

The drilling operation will be carried out by Noble Hans Deul drilling rig.   

The construction activities in the nearshore (<15m water depth) will utilise the vessel “Viking Energy” call sign MEPW5, which intends to commence construction operations from the landfall.

These works are expected to start from 14th June 2021, lasting approximately 1-2 days.

The exact finish date will be dependent on the prevailing weather conditions and work progress. It is requested that all vessels operating within this area keep their distance, maintaining at least a 500 m exclusion zone, and pass at minimum speed to reduce vessel wash.

The Geophysical Survey and EBS are being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. These Surveys are part of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

Two potential cable route options are being surveyed. Both cable route options commence at a location approximately 1 km offshore in Sandford Bay, in the vicinity of the SSE Peterhead Powerstation. The first route option terminates at a landfall to the south of the Powerstation, while the second route option terminates at a landfall to the north of the Powerstation. The vessel will survey both route options to a water depth of 3m, approximately 100m from the landfall locations. The surveys will commence 09/07/21 and are scheduled to take between 3 and 12 days to complete, depending on weather. 

The survey will be carried out by the vessel GeoSurveyor X, call sign LXGZ. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The GeoSurveyor X will be restricted in her ability to manoeuvre and shall deploy seabed analysis and samplling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geophysical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate in Sandford Bay, approximately 1km offshore in the vicinity of the SSE Peterhead Powerstation. A further survey is planned between this location and the cable landfall close to the Powerstation, which is the subject of a separate notice. The survey will commence on between 15/07/2021 and 21/07/2021 and is scheduled to take between 12 and 16 days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geotechnical  Survey from the Buchan location to the Forties pipeline. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy sonar equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geotechnical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geotechnical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate approximately 1 km offshore in Sandford Bay, in the vicinity of the SSE Peterhead Powerstation. The survey will commence between 09/08/2021 and 21/08/2021 and is scheduled to take between 12 and 16 days, depending on weather. 

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy seabed analysis equipment and will carry out seabed coring / sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

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Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence remedial cable protection operations (rock placement) works at various locations within the bounds of Moray East Offshore Windfarm circa 22nd June 2021. The area of Operation is shown in figure 1 and table 1 below, this will be carried out using DP2 vessel Rockpiper below

4 x clump weights to be installed for Mariner 8Y wellhead load relief system around 5th May.

This will be followed up with rig mooring pre-lay in June for planned rig (West Hercules) arrival in July.

All subsea components will be guarded by the Mariner Field ERRV until the rig arrives.  

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Following 2 recent faults (caused by impact damage) in the same area and subsequent repairs to the BritNed HVDC Interconnector, the latest completed on 07/06/21, 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. 

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.

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.

The Geotechnical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geotechnical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 17km to the northeast at a location over the subsea Tweedsmuir manifold. The survey will commence between 08/08/2021 and 19/08/2021 and is scheduled to take up to two days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geotechnical  Survey from the Buchan location to Sandford Bay. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy seabed analysis equipment and will carry out seabed coring / sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Boulton HM 44/22b-H1X development well position is shown on the map. Throughout well abandonment operations there will be a dedicated ERRV on location monitoring the surrounding sea area.

Seven Atlantic DSV – DC2 Bundle XT Tie-Ins (Subsea 7) Penguins Redevelopment Project - Infield 05/05/21 – Depart Field 23/05/21

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.

Seven Atlantic DSV (Subsea 7) Gas Export & Tybalt Tie-ins - Penguins Redevelopment Project - Infield 03/05/21 – Depart Field 20/05/21

• Gas Export Tie-ins at DC5
• Tie-in spools between RBM & GE Pipeline
• Tie-in Spools at Tybalt

Seven Pegasus DSV (Subsea 7) Tie-ins, Leak Test and De-watering - Penguins Redevelopment Project - Infield 11/06/21 – Depart Field 17/08/21

• Gas Export Tie-Ins, Leak Test and De-watering 
• Complete D7 Tie-ins
• Brownfield Bundle Tie-ins (DC2)
• DC2 Bundle Tie-Ins
• Brownfield Bundle Tie-ins (DC3 midline)
• UT Checks (Brownfield)

Seven Kestrel - (Subsea 7) Penguins Redevelopment Project - Infield 08/06/21 - Depart Field 22/06/21

• Seabed Prep (New Flowbases) and PAN-N Tie-in
• Complete DC7 Bundle Tie-In

DEME Rockdump Vessel – Rockdumping - Penguins Redevelopment Project - Infield 21/06/21 – Depart Field 24/06/21

• Re-instatement of Rockdump at DC4 DBBV
• Partial DC2 Bundle Rockdump

The Geophysical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 27km to the south at a location over the Forties Pipeline. The survey will commence between 07/07/2021 and 11/07/2021 and is scheduled to take up to three days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geophysical Survey from the Buchan location to the SAGE pipeline. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy sonar and seabed sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geophysical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 17km to the northeast at a location over the subsea Tweedsmuir manifold. The survey will commence between 13/07/2021 and 18/07/21 and is scheduled to take up to two days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geophysical Survey from the Buchan location to Sandsford Bay, close to Peterhead. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy sonar and seabed sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geotechnical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 27km to the south at a location over the Forties Pipeline. The survey will commence between 03/08/21 and 13/08/21 and is scheduled to take up to three days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geotechnical Survey from the Buchan location to the SAGE pipeline. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy seabed analysis and coring / sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geotechnical physical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geotechnical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 38km to the northwest at a location over the SAGE Pipeline. The survey will commence between 08/08/2021 and 19/08/2021 and is scheduled to take up to three days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geotechnical  Survey from the Buchan location to the location of the subsea Tweedsmuir manifold. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy seabed analysis equipment and will carry out seabed coring / sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The EBS is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The EBS is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the location of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The EBS will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 38km roughly WNW at a location over the SAGE Pipeline. The survey will commence around the 25/06/21 and is scheduled to take up to two and a half days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent EBS from the Buchan location to the Tweedsmuir manifold. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during EBS activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy subsea camera and sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The EBS is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The EBS is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The EBS will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate approximatelty 1km offshore in Sandford Bay, close to the SSE Peterhead Power Station. A further survey is planned from this location to the cable landfall, which is the subject of a separate notice. The survey will commence between 27/6/21 and 3/7/21 and is scheduled to take up to six days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geophysical Survey from the Buchan location to the Forties Pipeline. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during EBS activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy subsea camera and sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The Geophysical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 38km roughly to the WNW at a location over the SAGE Pipeline. The survey will commence between 09/07/21 and 14/07/21 and is scheduled to take up to four days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent Geophysical Survey from the Buchan location to the location of the subsea Tweedsmuir manifold. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy sonar and seabed sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The EBS is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The EBS is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the location of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The EBS will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 27km to the south at a location over the Forties Pipeline. The survey will commence on 23/6/2021 and is scheduled to take up to two days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent EBS from the Buchan location to the SAGE pipeline. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximtely 500m)(COLREGs Rule 16 & 18) from the areas identified during EBS activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy subsea camera and sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

The EBS is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The EBS is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

The EBS will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate 17km to the northeast at a location over the subsea Tweedsmuir ManifoldForties Pipeline. The survey will commence around 27 June 2021 and is scheduled to take up to one-and-a-half days, depending on weather. 

Following this survey, the vessel will continue to carry out a subsequent EBS from the Buchan location to the Sandford Bay location,, close to Peterhead. This is the subject of a separate notice.  

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during EBS activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy subsea camera and sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

During the survey operation, Wind of Pride will be investigating previously identified potential Unexploded Ordnance (UXO) and potential archaeological contacts along the defined route on a 24-hour basis.  This will be conducted using a ROV from a static vessel and will not involve towing equipment along the route.  Wind of Pride will also conduct ROV inspection of seafloor infrastructure along the DBA&DBB export cable routes

While engaged in surveying, the vessel will be restricted in its ability to manoeuvre and will display the appropriate day shapes and lights. She will be monitoring VHF Channels 16 and 70. Vessels are requested to pass at a minimum speed to reduce wash, maintaining a minimum 1000 metre separation distance.

During the survey operation, FUGRO SYNERGY will be deploying downhole drilling equipment, which will require the vessel to remain stationary for periods up to 30 hours at a time. While engaged in surveying, the vessel will be restricted in its ability to manoeuvre and will display the appropriate day shapes and lights. She will be monitoring VHF Channels 16 and 70. Vessels are requested to pass at a minimum speed to reduce wash, maintaining a minimum 500 metre separation distance.

The extensive over-trawl sweeps will be completed during 25 June 2021 to 9 July 2021.

Up to 3 XOCEAN USVs will be carrying out survey operations during June and July in an area to the south-east of the Isle of Man, between Douglas and Rhyl. The vessels will operate out of Carlingford, Whitehaven, or Rhyl.

Further details of the survey area can be found in the attachment.

Array Cable Seabed  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.

Please be advised that construction activities are ongoing within the wind farm, supported by Crew Transfer Vessels (CTVs) and survey vessels intermittently. The Deep Cygnus will be mobilising to site as a support vessel to the ongoing construction works on or around 28th May 2021. The MHO Grimsby continues to carry out construction geophysical surveys intermittently utilising a hull-mounted system within the proposed Hornsea Project Two Offshore Wind Farm site and the Wind Innovation remains on the project for construction support.

It is requested that all vessels operating near the construction area keep a safe distance and pass at minimum speed.

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Mariners are advised that Scottish Sea Farms intend to deploy scientific equipment oat the southern end of Lismore.  Two bottom mounted ADCPs rigged in j-shaped moorings and marked with surface buoys will be deployed off the south end of Lismore, one in each location shown in the attached document.

Work will commence beginning Tuesday 25th May at the earliest and deployment is expected to be completed that week using the workboat Sarah Louise, callsign 2GA03.  These moorings are expected to be in place until the beginning of September 2021.

Enquiries should be directed to Rachel Speirs at Scottish Sea Farms using the email address surveys@scottishseafarms.com.

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.

Please be advised that R.V. Ridley Thomas IMO 8112744 will be conducting telecommunication cable survey activities for an undersea fibre optic communications cable within the Northeast Atlantic, west of Galway from around 10th June to early July 2021.

We kindly request that ships and fishing vessels keep a distance of at least 1 nm from the hydrographic survey vessel that will be towing a side scan sonar. We also kindly request that any set or drift gear, such as longlines, gillnets, and pots/traps be moved off the route by a distance of 1/2 nm on either side at the locations and during these periods noted above in order to avoid gear entanglement.

The work will include towed sonar survey and bottom sampling and will be performed 24/7. The cable route survey operations include the stern deployment of a sonar towfish tethered with steel cable at varying water depths to collect geophysical/bathymetric mapping data for a proposed undersea telecommunications cable. Towfish towing wire layback will be 3x water depth behind the vessel stern. The maximum depth of tow operations will be 1500 metres. The sonar sensor will be towed approximately 20-40 metres from the seafloor. The survey corridor is 1000 metres centred on the survey centreline.

Please be advised that R.V. Ridley Thomas IMO 8112744 will be conducting telecommunication cable survey activities for an undersea fibre optic communications cable within the Northeast Atlantic, west of Galway from around 10th June to early July 2021.   We kindly request that ships and fishing vessels keep a distance of at least 1 nm from the hydrographic survey vessel that will be towing a side scan sonar.

We also kindly request that any set or drift gear, such as longlines, gillnets, and pots/traps be moved off the route by a distance of 1/2 nm on either side at the locations and during these periods noted above in order to avoid gear entanglement.   The work will include towed sonar survey and will be performed 24/7. The cable route survey operations include the stern deployment of a sonar towfish tethered with steel cable at varying water depths to collect geophysical/bathymetric mapping data for a proposed undersea telecommunications cable. Towfish towing wire layback will be 3x water depth behind the vessel stern. The maximum depth of tow operations will be approximately 100 metres. The sonar sensor will be towed approximately 20-40 metres from the seafloor. The survey corridor is 500 metres centred on the survey centerline.  

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.

The current profiler is scheduled to be deployed on the week commencing June 14th 2021 by the vessel 'Coastworker'. 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 clump weight will be attached to floats that will sit aprroximately 3m above the seabed. A mooring diagram for the current profiler has been attached. 

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

Type See detailed map on our bulletin website

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).  The Valaris 123  re-commenced drilling operations at the NE well on 19th May 2021.

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

Please be advised that Global Marine will be conducting the installation of the proposed NOUK Telecommunications cable in UK TW and EEZ. Please note that there will be numerous vessels associated with the project. These are summarised below:

• Pre installation rock placement (UK EEZ) 30th June – 2nd July 2021

The Nordes vessel will be conducting pre installation rock placement at 2 pipeline crossings. These are located at (55 19.2785’N 0 18.1219’W) & (55 57.2785’N 1  38.5306’E).  

• Pre-Lay Grapnel Run (PLGR) route clearance (UK EEZ – TW)  9th June – 27th June 2021

The AHTS Sima vessel call sign: OUXR2 will be conducting PLGR route clearance along the NO UK route within UK waters.

• Cable installation (UK TW - EEZ)  14th July – 24th August 2021

The Normand Clipper will be installing the proposed NOUK cable from the landing point at Seaton Sluice and laying the cable towards Norway.

• Post Lay Inspection Burial (PLIB) (UK TW - EEZ) 17th August – 2nd September 2021

The Symphony call sign: C6YY3 will be conducting PLIB activity along the proposed cable route.

• Post installation rock placement vessel (UK EEZ) 1st – 9th September 2021

The Nordes vessel will then be conducting post installation rock placement at the 2 pipeline crossings described in Section 1 above.

Note that the timings are subject to change however an update due in early June.

The vessels will be limited in manoeuvrability. Other vessels should maintain a distance of at least 1NM from the cable ship during operations.  Please contact myself or Paul Deslandes, Project Manager (in copy)  if you have any queries regarding this notification or if you have any information on any underwater activity in this area that is relevant to the proposed operation.

Type See detailed map on our bulletin website

Pre-lay moorings to be installed for the West Hercules from earliest 6th June. 

Mooring installation will be protected by a Guard Vessel until the rig arrives on location

The survey will be conducted using the Noordhoek Pathfinder and will involve the use of Multibeam Echosounder (MBES), Sidescan Sonar (SSS), Sub-Bottom profiler (SBP), Remotely Operated Vehicle (ROV), Unmanned Survey Vehicle (USV – nearshore Shetland only) and Magnetometer equipment, some of which will be towed sub-surface astern of the vessel. The Survey is being undertaken to enable the refinement of the cable route and the optimisation of trenching.

The extent of the planned survey is -/+100m either side of the route centreline detailed in this notice.

When using towed equipment, the total run-in length for Noordhoek Pathfinder is a minimum of 1200 m with a minimum turn radius of 320 m. As such, the vessel may at times be required to operate outwith the 200m wide survey area to facilitate survey line changes.

A Surrogate Item Test (SIT) for the purpose of verifying the capabilities of the MBES, SSS and MagSense systems will be utilised. The SIT will be completed in the Northern or Southern location detailed in this notice, subject to weather. A target weighing approx. 50kg will be deployed on the seabed, attached to a clump weight and marked using a bright yellow surface buoy. The approx. area required for the work is 40m wide x 100m long, and the survey vessel will remain in the vicinity of the SIT for the duration of the exercise (4-6 hours). On completion, the target will be recovered.

All vessels are required to comply with the COLREGS, especially rules 16 and 18 as the survey vessel will be restricted in her

ability to manoeuvre.

As part of the preparation works for cable installation in the nearshore area of Thorntonloch, two short trenches of approximately 800 metres (m) are currently being excavated for a section of each export cable, with the material temporarily being side cast. The height of the side cast material will temporarily reduce the navigable water depth by up to 1.5m, which, due to the shallow water depths in the nearshore area, is greater than 5% of the water depth in some areas. To notify maritime users of this temporary change, a conical marker buoy has been installed at the seaward extent where the reduction is no longer greater than 5%.

The conical marker buoy installed is a SL B700, 1510mm in height and 700m diameter shown in Figure 2. The buoy has an interconnected mooring attached to a clump weight and an installed lantern. The lantern is emitting a yellow light with a character of flashing once every 5 seconds at a minimum range of 2 miles.

Schedule The conical marking buoy will be in position until the temporary side cast material is backfilled and the water depth is no longer reduced. This is expected to be completed towards the end of July 2021.

A Potential Unexploded Ordnance (pUXO) identification survey will take place within the Seagreen Offshore Wind Farm site boundary. The survey vessel, Glomar Worker will utilise an ROV mounted magnetometer and video camera to conduct the survey of numerous targets to identify any possible UXO risk. Wind Turbine Generator positions, Inter Array Cable routes and 1 Offshore Sub-station location within the Seagreen site boundary will be surveyed.

The vessel will arrive at site on or around Sunday the 23rd of May. Survey works are expected to be concluded by July 21 however this period may be extended due to weather conditions.

Please be advised that Tarmac Marine Ltd and Hanson Aggregates Marine Ltd will be carrying out a seabed grab sampling survey in the Severn Estuary, located on and around the Middle and Welsh Grounds sandbanks. Survey operations are expected to last several days and will be carried out by Ocean Ecology on the Seran Las starting no earlier than June 1st 2021.

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.

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 Blue 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

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence remedial scour protection operations (rock bag and mattress placement) works within the 50m safety zones at various locations within the bounds of Moray East Offshore Windfarm circa 22nd May 2021. The area of Operation is shown in figure 3 above, this will be carried out using DP2 vessel Olympic Artemis

Type See detailed map on our bulletin website

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

The rig repairs are almost complete and thus the Ocean Endeavor is due to return to the Arran North location around the 23rd May 2021.

Arran North 2 is completed but does not yet have the Xmas Tree installed.

Arran North 1 will be left with the rigs blow out preventer installed on the wellhead as it will not be possible for the rig to recover it before departure.

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.

During the survey, attempts will be made to obtain 40 core samples from the seabed within the survey area defined in this notice. Samples will be acquired using a vibrocorer capable of extracting cores of up to 6m in length. The work is expected to take 6-10 days, weather permitting.

During the survey, attempts will be made to obtain 10 - 15 core samples from the seabed within the survey area defined in this notice. Samples will be acquired using a vibrocorer capable of extracting cores of up to 6m in length. The work is expected to take 2-3 days, weather permitting.

Please be advised that Repsol Sinopec Resources UK Limited (RSRUK) intend to carry out subsea removal & remediation works in the Buchan & Hannay fields during Q2/Q3 this year, commencing on the 1st June 2021.

The intention is to execute this works over two campaigns: •    Campaign 1 – mobilising 1st June for approximately 20 days  •    Campaign 2 – mobilising 10th August for 40 days

Summary of the Offshore Scope, in accordance with the approved decommissioning programme is: •    Rigid pipelines removal (13.5km); •    Flexible Pipelines / Umbilical removal (15.6km); •    Subsea structures removal (215Te); •    Rigid tie-in spool-pieces removal (67Te); •    Flexible jumpers/umbilical jumpers removal (0.47km); •    Deposits removal (866Te); •    Debris removal (five grid zones); •    Rigid pipelines & Umbilical Ends remediation (1.45km of remediation).

This infrastructure is contained with the Buchan & Hannay fields, with a large proportion of the works being focused around the Buchan template 500m subsea safety zone.  The coordinates for the area are:   A small part of the works (2-3 days) will take place the Forties Charlie end of the Buchan export pipeline, within the Forties Charlie 500m zone.

The work will be carried out using Construction Support Vessel’s (CSV), support by WROV.  

Pipeline Works Authorisation variation and supporting permits are currently in the approval process.  

These vessels will be supported by the” Spectrum 1” call sign: 2CQX3 and” Dalby Tees” call sign: 2FIA7 carrying out crew transfer operations. Works are to take place at various locations across the London Array windfarm As part of this work, Dynamic Bend Stiffeners will be installed using, subsea installation tools and divers within the London Array Wind Farm. Vessel: C-Fenna C-Fenna Dive Support Vessel (DSV) has a length of 26.5m and breadth of 11.0m. The C-Fenna uses a four-point mooring system. The C-Fenna will undertake mooring deployment within 150m of the assigned WTG. Equipment will be periodically deployed and suspended from the vessel crane during the work.

Planned Diving Locations and Restricted Access Zones:

The works is expected to commence on the 1st of May 2021 and continue for approximately 6 months. During this period diving locations will be selected from the list of locations as detailed in Figure 1. A total of three locations could be operational at any one time. Information about what location is presently being worked will be transmitted over VHF informing all local vessels of restrictions.

Prior to commencing diving operations 4 chain clump weights mooring will be deployed at the required WTG location. These moorings will be positioned as required to avoid known obstruction and expected current flows but will be within 150m radius of the WTG. Once deployed a 150m exclusion zone will be placed around the WTG. The Mooring will consist of two 12t chain cluster weights connected to a surface buoy. A yellow light flashing yellow once every 5 seconds.

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence walk to work operations work scope at all 3 OPS’s within the bounds of Moray East Offshore Windfarm circa 19th May 2021 using Island Crown for approximately 40 days. Technicians will transfer via walk to work on all 3 OPS’s for commissioning and painting works.

The Works shall comprise the location of the following mobile installation:

The mobile drilling unit (MoDU) - PR5 (Prospector 5)

The Works shall be located at:

57 10' 05.97"N 01 05' 27.27"E

Quad/Block - 22/21c

We will be deploying two scientific Acoustic Doppler Current Profilers on the sea bed for 6-12 months from May 2021 to collect currents data for environmental monitoring and hydrodynamic model validation.  The instruments have no surface markers and will be recovered using acoustic releases.  One of the instruments will be inside a low profile trawl-resistant frame (Little Minch, west of Skye) and one inside a steel frame (Loch Erisort).  See attachment for photos of the frames, a chart with their position and their positional details.

Type See detailed map on our bulletin website

Landfall Preparation and Cable Installation Please be advised that the second of three export cable pull-ins is complete and the SW cable (yellow, central circuit shown in Figure 1) is exposed on the beach prior to burial works commencing. The Maagd will be leaving site on or around 10th May 2021 and returning approximately 2 weeks later. In addition to this export cable installation activities in the intertidal area are ongoing at the landfall at Horseshoe Point, Lincolnshire and will continue 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:

The vessel will be using a multibeam echosounder throughout the survey, which will be running 24 hour operations. The survey should be complete within 14 days, dependant on weather.

The vessel will be using a multibeam echosounder throughout the survey, which will be running 24 hour operations. The survey should be complete within 14 days, dependant on weather.

Callisto ZM exploration well 49/22-6Z

53°14'31.96"N  2°23'16.54"E

Start Date: 25/05/21    End Date: 29/06/21

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

A 50-metre exclusion zone is advised around the anchor chain for safety reasons.  

10 mooring line trenches, varying in length from 70m to 180m; up to 8 metres wide and up to 9 metres deep. These trenches are steep-sided (in many cases vertical, cut into the clay seabed).

10 anchor scars, consisting of shallow trenches (20-90 metres long), shallow-sided depressions (less than 2 metres deep) but with areas of significantly disturbed seabed, including clay boulders up to 3 metres in size.

A north cardinal buoy is now in position 75m north of the cable loop on the following location and display a very quick flashing white light.

The marker buoy will remain in position until July 2022 when cable replacement works are planned to be completed by.

Partrac is to deploy two large metocean buoys (E03 and E13) at two separate locations approximately 18 miles northwest of Cromer and 28 miles north of Cromer in the southern North Sea 

Once deployed, please maintain a 500m exclusion around each buoy.

Deployment is estimated to be carried out over one day from the 5th May 2021, weather permitting.

The deployments will be completed by the vessel Isle of Jura.

The surface buoys will include: AIS; A day shape of yellow St Andrews Cross; radar reflector; and yellow navigation light.

The metocean buoys record meteorological data and are anchored to the seabed by means of a mooring chain and a ground weight. The buoy has dimensions of 4m x 4m, and when deployed the tallest mast on the buoy sits approx. 4m above the water line  

The planned survey works will be completed by personnel from Titan Environmental Surveys Ltd on either the Titan Endeavour or the Titan Discovery. The work is expected to take approximately 24 hours in suitable weather conditions, although adverse weather conditions may mean that the total estimated survey time is spread over several days. The survey will be carried out along NNE – SSW orientated survey lines and some tie lines perpendicular to the main survey lines will also be surveyed.

Note fishing has been observed over subsea infrastructure including 40m L x 35m W x 11H Template structure that is within a 500m Safety zone.

The safety zone is to protect all parties and is a legally restricted area that can only be entered under Special Circumstances;

             1. To attempt to save a life or property,

             2. Owing to bad weather ,

             3. When in distress.

All vessels including fishing vessels must not fish within or transit over the 500m safety zone.

NRW and the MMO have issued Tarmac Marine Ltd and Hanson Aggergates Marine Ltd. new marine licenses to dredge marine aggregates from Area 531, located in the Severn Estuary.  Dredging is expected to commence, within a restricted dredge zone, no earlier than 1st June 2021.

Decommissioning works on the UKCS will commence late May 2021 with disconnection and recovery of cut sections of a 10" production pipeline and an umbilical inside the FPSOs 500m safety zone. This in order to disconnect the Brynhild subsea manifold in Norwegian waters from the FPSO Haewene Brim located on the Pierce field in the UK. The works are expected to be completed by late July 2021.

The following vessels will be active during the decommissioning campaign;

Location Coordinates

Brynhild field NCS                                            57° 29.317' N - 002° 18.039' E 

Pierce Field Riser base manifold UKCS       57° 09.461' N - 002° 17.288' E

For further information, please contact:

Geir-Olav Fjeldheim, Lundin Energy Norway AS, Tel: +47 926 64 830 email: geir-olav.fjeldheim@lundin-energy.com

The Deep Arctic (Call Sign: C6XW3) will be carrying out Umbilical Repair activities BETWEEN the various locations noted below :

Start date = 11th May 2021

Duration expected to be approx. 45 Days

The Far Superior (Call Sign: LATJ7) will be carrying out Umbilical Repair Support & Testing activities BETWEEN the various locations noted below :

Start date = 13th May 2021

Duration expected to be approx. 50 Days

The subsea service company DeepOcean will perform a series of campaigns to prepare, install, commission and protect a new subsea drilling template on the Yme field development. The subsea activities will result in these subsea assets being temporarily exposed with a reduced level of overtrawlability. Trawling within a Caution area of radius 300m around 57°45' 21.669"N 004°22' 04.416"E(WGS 84) may potentially lead to injury, loss of trawling/ fishing equipment, and/or damage to DeepOcean and/or Repsol Norge AS assets.

The location will be marked by a virtual AIS buoy, monitored by the Equinor Marin radar surveillance, and by the Guard vessel Esvagt Corona during this period. Equinor Marin, the Esvagt Corona and Yme Platform Mærsk Inspirer will attempt to contact fishing vessels approaching the aforementioned location.

Premier Oil are planning to undertake a cross asset inspection campaign using the Subsea 7 chartered MMA Pinnacle ROVSV. in the Solan Field

The survey will last 72 days in total, however each site to be surveyed will last 2-20 days, depending on the location and any operational delays e.g. weather.

The MMA Pinnacle is scheduled to mobilise Saturday the 1st May 2021 to first survey location; Rita & Hunter.

Start date: 1st May 2021 and end date of 7th August 2021

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An unmanned survey operation to collect hull mounted bathymetry data using 3 vessels. The vessels are all fully controlled 24 hours a day using satellite communications. During periods of bad weather XOcean will use Hartlepool or Grimsby to transit to for shelter. The area of operation will cover the project area at Endurance and two proposed pipeline route corridors.

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The North Falls Offshore Wind Farm site is located to the east of Felixstowe and bordering the Greater Gabbard and Galloper existing wind farms

Fugro Mercator - Offshore Geophysical Investigation

The geophysical operations at the North Falls site are expected to be carried out from the Fugro Mercator call Sign: C6DU5 from 10th May 2021 for approximately 8-9 weeks. Fugro Mercator will be conducting operations across the Main Array and Export Cable Route areas >10m LAT.

As the Fugro Mercator will be towing survey equipment the vessel will require large turning circles and will be restricted in her ability to manoeuvre. All vessels operating within this area are requested to keep their distance, maintaining at least the 1,000m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

A continuous listening watch will be conducted on VHF Channel 16.

Survey operations will be conducted on a 24-hour basis  

Curtis Marshall - Environmental Investigation

The environmental operations at the North Falls site are expected to be carried out from the Curtis Marshall call sign: 2HWN3 from 1st July 2021 for approximately 7 days. Curtis Marshall will be conducting operations across the Main Array and Export Cable Route areas both offshore and nearshore.

Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress.

As the Curtis Marshall will be deploying equipment astern of the vessel, the vessel will require large turning circles and will be restricted in her ability to manoeuvre. All vessels operating within this area are requested to keep their distance, maintaining at least the 1,000m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

A continuous listening watch will be conducted on VHF Channel 16.

Survey operations will be conducted on a 24-hour basis  

Fugro Seeker - Nearshore Geophyscial Investigation

The geophysical operations on the North Falls export cable route from the 10m LAT contour inshore to the potential landfall, are expected to be carried out from the survey vessel Fugro Seeker call sign: 2HCS2 from 15th May 2021 for approximately 10 weeks.

Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress.

As the Fugro Seeker will be towing survey equipment the vessel will require large turning circles and will be restricted in her ability to manoeuvre. All vessels operating within this area are requested to keep their distance, maintaining at least the 500m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

A continuous listening watch will be conducted on VHF Channel 16.

Survey operations will be conducted on a 12-hour basis.

Please be advised that the remaining post-lay burial (PLIB) works of the Havhingsten fibre optic telecommunication cable system have now been completed in the Irish Sea, but there are three areas of surface-laid cable which are pending rock placement works.

There is 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.

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

Geophysical Survey

ABPmer will be conducting a geophysical survey in and around the Kingmere MCZ in May 2021. It is expected that survey operations in the area will commence on w/c 17th May for a period of 6 days. The survey will be conducted using the ‘Wessex Explorer’ using a vessel mounted multibeam echosounder.  Multibeam data will be acquired in nine small survey areas as detailed below. ABPmer completed these works successfully in previous years and understand the importance of working with the fishing industry and as such will always work around fishing gear and activity that they are made aware of.

Drop-Down Video Survey

Three one-day drop-down environmental video surveys will be conducted within the same survey areas. These will be conducted on w/c 31st May, w/c 5thJuly and w/c 19th July. The video will be towed up to 100m astern of the Littlehampton Harbour Board vessel, ‘Erica’.

The marine survey works are being carried out by Next Geosolutions UKCS Ltd. on behalf of National Grid Electricity Transmission Plc and Scottish Hydro Electric Transmission Plc.

The marine survey activities are planned to commence at Sandford Bay and close to Peterhead from the 20th April 2021. Upon completion of the Nearshore Marine Survey at Peterhead the vessel will transit to Bridlington to complete the Nearshore Marine Survey at Bridlington. Works will continue along the offshore route until August 2021. The marine survey works covered by this NtM are to be conducted by three survey vessels, divided into the following activities, as indicated:

The Nearshore works are to be conducted West, of point AC6, Longitude 1° 43.5’W at Peterhead and West of point AC61, Longitude 0° 03.7’W South of Flamborough Head, Bridlington, reference Figures 1 and 2 overleaf. All vessels shall pass at a safe speed and distance, whilst fishing vessels shall remain at a safe distance (approximately 500 meters) (COLREGs Rule 16 & 18) from the areas identified during marine survey operations. The aforementioned survey vessels will be restricted in her ability to maneuver and shall deploy towed sensors during geophysical survey operations only. The survey vessels will monitor VHF Channel 16 at all times. Mobile contacts for the vessels are listed at the end of this NtM.

The Northern Producer FPF has been removed from it’s moorings and towed to port for decommissioning but 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.

This includes the 8 No Risers draped over the Mid Water Arch (MWA), the MWA Clumpweight Guide Frame, the Riser Base Structure (RBS) and the surface laid pipelines / Umbilicals.  The MWA will remain in the water column at a depth of 112m and will remain tethered to the seabed via the clumpweight guide frame. The risers will remain draped over the MWA with one end on the seabed and the other end will remain connected to the RBS so that they remain stable. The existing stabilisation mattresses will remain in place over the surface laid pipelines/umbilicals.

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The approximate dimensions of the Debris Cap is 4.5m x 3.9m x 1.4m with a weight of approximately 3.5 tonnes. It is not known whether the Debris Cap is lying within a 500m zone of the well. A 200m x 200m area centred on the well has been searched, with no sight of it. Therefore the exact location of the Debris Cap is unknown. The loss of the Debris Cap leaves the NW Schooner wellhead more vulnerable to snagging from trawler/fishing nets. The approximate size of the tree with over trawl legs deployed is 7.8m x 7.8m x 6m high.

The Flotel Safe Caledonia is alongside ELGIN PUQ – within 500m zone. Providing additional accommodation for ongoing fabric maintenance campaign.

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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Type See detailed map on our bulletin website

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.

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

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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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.

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. 

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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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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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.

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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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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.

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.

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

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

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

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

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.

Details of Seabed - West Cluster

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

Details of Seabed - North East Cluster

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

Details of Seabed - Southern Cluster

Note: 30m pile is installed in this fast frame

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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.

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.

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.

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

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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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. 

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.

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.

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.

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

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.

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

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.

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.

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

Type See detailed map on our bulletin website

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

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

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.

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

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