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On behalf of Seagreen Wind Energy Ltd, Nexans AS will commence the installation of the first of three Seagreen export cables. Operations will commence at the Carnoustie cable landfall site, the export cable will be floated ashore where it will be pulled into the landfall cable protection pipe and terminated. The cable will then be surface laid through the Seagreen export cable corridor to the offshore sub-station platform. Once at the offshore sub-station the cable will be pulled into the platform. The cable will be trenched at a later date. There shall be five vessels utilised during this operation. Nexans Aurora will transport the cable to site and lay it between the landfall site and sub-station platform, there shall be a number of small tenders deployed from the Nexans Aurora during operations at landfall. During pull-in operations at the sub-station platform the Manor Enterprise crew transfer vessel will deploy teams to the platform. Three guard vessels will be deployed to guard the surface laid cable. Nexans Aurora and Manor Enterprise are expected to arrive at the Seagreen site on or around the 31st of January. The guard vessels will arrive at different dates which are to be confirmed. 

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Survey Duration  

The survey is planned to mobilise between 29th January and 1st February 2022. The completion of the geotechnical survey will be by the 22nd February 2022.  

Survey Tasks  

The survey is to be split into 2 distinct phases:  

   1. Berwick Bank Wind Farm borehole survey beginning January/February and  will be complete by the 22nd February 2022 

   2. Berwick Bank Wind Farm borehole and Cone Penetration Test (CPT) survey beginning June 2022 and will likely take up to 10 months to complete. A separate   NtM will be developed and disseminated in relation to this survey once full survey and vessel details are known 

Additionally, the Artemis will also be on location from the 29th January 2022.   

During the survey campaign, the vessel(s) will be deploying underwater equipment to gather cores and also assess the geology in the area. As a consequence of equipment being deployed and the modes of operation, all mariners are advised to keep a safe clearance distance of no less than 500m from the vessel(s).   

It should be noted that SSE Renewables are not expecting fishermen to relocate gear - on this occasion the vessel(s) will work around any gear on location. A scouting/guard vessel will operate ahead of the survey vessel to ensure that this can be achieved. 

At this location, the export cables are buried to the required depth and the trawl gear did not pass over any rock protection or any known boulders, as such the cause of the peak tension is unknown. This will be investigated by the project at the earliest available opportunity.

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Please see the map attached or go to the updated restriction for more information: https://kingfisherrestrictions.org/fishing-restriction-map?Solway Firth Ref:2151

Please see the map attached or go to the updated restriction for more information: https://kingfisherrestrictions.org/fishing-restriction-map?Ref:2148

Please see the map attached or go to the updated restriction for more information: https://kingfisherrestrictions.org/fishing-restriction-map?Lochs Duich-Long-Alsh

Tie-in and pre-commissioning activities will be carried out using a DSV (diving support vessel) between the Everest  East Expansion North Manifold and the new LAD well in Block 22/10a in the UKCS between 10th and 28th February 2022.

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

Demarcation Buoys

The 12 Demarcation Buoys that were deployed to mark the perimeter of the Triton Knoll Offshore Wind Farm (TKOWF) site boundaries have been removed by th MV 'Barney'.  The southern Metocean Buoy (TK13) has also been removed from the TKOWF.  The northern Metocean buoy (TK14) will remin on locations, as detailed below, until further notice.

Mariners are advised that all foundations monopiles have been installed and all inter-array and export cables have been installed.

Local Notice to Mariners Recently

NtM 008-2021 (25th June 2021)

NtM 009-2021 (29th July 2021)

NtM 010-2021 (20th August 2021)

NtM 011-2021 (12th November 2021)

NtM 012-2021 (18th November 2021)

NtM 013-2021 (16th December 2021)

NtM 014-2021 (22nd December 2021)

NtM 015-2021 (31st December 2021)

NtM 001-2022 (24th January 2022)

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.

A-2-Sea Solutions Ltd will be operating vessel 'Noortruck' on a 24-hour basis, sailing survey lines between 5-10 knots.

Equipment will not be towed and only a hull mounted multibeam echosounder will be used.

Vessel Noortruck will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

A-2-Sea Solutions Ltd will be operating vessel 'Noorttruck' on a 24-hour basis, sailing survey lines between 5-10 knots.

Equipment will not be towed and only a hull mounted multibeam echosounder will be used.

Vessel 'Noortruck' will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

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A-2-Sea Solutions Ltd will be operating either 'FPV Morven' and/or 'Cerys Line' on a 24-hour basis, sailing survey lines between 5-10 knots.

Equipment will not be towed and only a hull mounted multibeam echosounder will be used.

FPV Morven and Cerys Line will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

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A-2-Sea Solutions Ltd will be operating either 'FPV Morven' and/or 'Cerys Line' on a 24-hour basis, sailing survey lines between 5-10 knots.

Equipment will not be towed and only a hull mounted multibeam echosounder will be used.

FPV Morven and Cerys Line will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

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General Maintenance

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 Valaris 123 has left the Tolmiunt field and the Rowan Norway will remain alongside the Tolmount Minimum Facilities Platform and will remain on location circa. 28 February 2022.

The Maersk Innovator Drilling Rig is due mobilise from Denmark to the Catcher Area in January 2022 and should be on location at the Catcher North drilling template by the 7th of February 2022. Batch drilling of the Catcher North and Laverda wells are not due to commence until 12th February 2022, weather permitting.

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Operations will take place, subject to weather and other operational factors, from 24th January 2022 for 6 days.

A support vessel will escort the USV from port to clear water.

Although the vessel is uncrewed, it is piloted consistently over the 24 hour operation. The remote Pilot uses 360 degree cameras and other navigational aids.

The survey area boundary is indicated below. In addition to the survey area, the USV will transit from Lowestoft. 

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.

Safety Precautions: The USV is equipped with the following to make it conspicuous to other marine traffic:

• AIS;
• Navigation Lights & Sound Signal;
• Active Radar Reflector;
• Superstructure Painted Yellow.

Seafarers are asked to avoid contact with the vessel and be aware of the operational area during this period.   USV Details Name: X-11 (UNCREWED) MSI: 232033343 Length: 4.5 m Beam: 2.2 m Speed: 3.5 kts Draught: 1.5 m Tonnage: 750 kg   

Position of the two METOCEAN BUOYS  ( Now Deployed)

MORGAN (North)  53°59.71'N   003°59.73' W

MONA (South)       53°40.27'N   003°53.77' W

Description of Buoys : Yellow ‘X’ shaped topmark, Yellow in colour.  

Characteristics of Buoys  :  FI (5) 20s Y light (3.5nm range)  Flash rate not exceeding 20 per minute

……………………………………………………………………………………

Position of the two FLOATING LIDAR BUOYS (Deployment scheduled for Quarter 1 2022)

MORGAN (North)  53°59.52'N   003°59.40'W

MONA (South)       53°40.08'N   003°53.44'W

Description of Buoys : Yellow ‘X’ shaped topmark, Yellow in colour.

Characteristics of Buoys  :  FI (5) 20s Y light (3.5nm range)  Flash rate not exceeding 20 per minute

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Our contractor is currently undertaking an investigation to inform on causes and will produce a report. Any anticipated redeployment is not expected within the next two weeks; a further notice to mariners will be published for re-deployment. 

The replacement guard buoy is anticipated to be identical to the lost buoy and would be installed at the same location using the same methods. Any changes from the original deployment specifications would be captured within the re-deployment notice to mariners and within a Kingfisher Information Services notice.   

All works will be undertaken using the CWIND Alliance operating from the Port of Mostyn.  The vessel will be towing equipment up to 150m behind the vessel and will be displaying resticted maneuverability shapes / lights at all times in accordance with regulations.  A wide berth is requested at all times when vessel operating.  A VHF watch (Ch. 16) will be maintained at all times

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The application is for the Active Dredge Zone in Area 464 to be removed and the Active Dredge Zone in Area 458 to be extended by an equal extent.

The changes are planned to come into effect after 22/02/2022.

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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.

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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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.

Wave Buoy Mooring

Before the start of the ROV operation:

• The vessel will run survey lines between the original location and recovery position (see coordinates below).

ROV search locations:

• 51 °28’35.34”N 5 °36’8.10”W (original location)
• 51 °28’37.44”N 5 °36’11.04”W (potential recovery position)

Damaged Mooring

ROV search locations:

• 51 °27’45.29”N 5 °37’7.32”W (original location)
• 51 °27’45.10”N 5 °36’39.66”W (estimated release position)

In case the mooring system cannot be found at the locations listed above, a survey will be completed within the search area (see NtM for more detail)

The NtM also includes further information about the activity, geographical co-ordinates, navigational safety features, vessel details and contact details.

It is recommended that mariners continue to remain vigilant and make note of the approximate mooring locations.

The geophysical component of the survey will involve multibeam echosounder and sidescan sonar techniques (with the vessel underway and towing any survey apparatus). The environmental component of the survey will involve seabed photo/videography, and seabed (benthic) sediment ‘grab’ sampling (with the vessel stationary). A total of up to 38 stations will be surveyed/sampled.

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The ballasted instrumentation frame weighs around 370kg, measures approximately 1.5m high x 1.5m wide x 1.5m long  and is connected to a 100kg clump weight via a 100m wire ground line.

Once installed, the frame will sit on the seabed in water of at least 28m depth, with no surface infrastructure such as buoys or markers. Vessels will be able to pass safely through the area and above the frames. Use of static or mobile benthic fishing gear in the immediate area should be avoided to avoid the risk of snagging.

The as-deployed position of the frame will be updated if different from that stated here.

A multicat vessel the Leask Marine MV C-Force, call sign MITT4 (or a similar vessel) will conduct offshore and subsea operations. Works will include loading and preparatory work at Cullivoe Pier and Belmont Pier. Operations could take place during the day or at night.   Operations will be conducted within the works area bounded by points A/B/C/D below (vessels should keep well clear e.g. 100m) and up to 50m either side of the cable corridor route; see waypoints below.

Following Operational challenges during the Ketch conductor severance and removal campaign, the 26 inch conductor for KA08 has been severed at a shallower depth of -8ft, leaving a partially exposed stump. ROV footage has observed a crater around the conductor with approximately 2 ft of conductor sitting above the base of the crater. The crater is estimated to be 4 m in diameter with a maximum depth of10 ft. The crater is known to be naturally backfilling with seabed sediment and is expected to continue to do so, particularly during winter months. The incremental risk posed by the 2 ft conductor stump is considered to be negligible.

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 Please see the map attached or go to the updated restriction for more information: https://kingfisherrestrictions.org/fishing-restriction-map?Cornwall

• Ref:1516 = Lands End https://kingfisherrestrictions.org/fishing-restriction-map?Lands-End
• Ref:1517 = Lizard https://kingfisherrestrictions.org/fishing-restriction-map?Lizard
• Ref:1518 = Fal & Helford https://kingfisherrestrictions.org/fishing-restriction-map?Fal & Helford
• Ref:1519 = Eddystone Reefs https://kingfisherrestrictions.org/fishing-restriction-map?Eddystone Reefs
• Ref:1520 = Hand Deeps https://kingfisherrestrictions.org/fishing-restriction-map?Hand Deeps
• Ref:1521 = Bretons https://kingfisherrestrictions.org/fishing-restriction-map?Bretons
• Ref:1522 = Plymouth Sounds https://kingfisherrestrictions.org/fishing-restriction-map?Plymouth-sounds

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are reporting that Buoy 9  Special Mark has been reported as unlit Further details on the buoy locations and transit route are provided in Table 1 and figure 1 below. Update on vessel(s) involved in the repair work will be provided through future NtMs and Weekly  Notice ofOperations. These can be accessed in the Moray East website at: http://www.morayoffshore.com/moray-east/the-project/notices-to-mariners/

An ROV with integrated grab tool will be launched from the Vessel using the vessels heave compensated crane to facilitate the relocation of pre-selected boulders from working areas. Any seabed debris located within working areas will also be relocated. The replacement boulder clearance vessel Siem Dorado is expected to arrive on site on the 17th November 2021 to recommence boulder clearance and relocation operations.

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The 7 units will have the following equipment:

Units 1, 3, 4, 5, 6 & 7 - Seabed Frame with attached acoutstic release mechanism & surface navigation buoy within 150m of the seabed frame

Unit 2 - Seabed Frame with attached acoutstic release mechanism & surface navigation buoy within 150m of the seabed frame. This unti will also have a second surface buoy attached to the seabed frame to measure additional information.

It is advised to give 200m clearance to these units

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Please be advised that Vattenfall Windpower Ltd. has contracted Fugro to carry out a geoscience survey for the proposed HT1 Pipeline Route, located between the Aberdeen Offshore Wind Farm and Aberdeen Port.

The route starts at the existing Aberdeen Offshore Wind Farm (AOWF), with KP0 located at the proposed landfall in Nigg Bay and ends at Wind Turbine Generator (WTG) B06 at KP12.4. 

The geoscience survey shall provide seabed bathymetry, sub bottom data, side scan sonar imagery and magnetometer readings, as well as geotechnical/environmental data, all within the defined survey area.

The survey will utilise one vessel to complete survey operations:

1. Valkyrie (nearshore vessel) Operating during daylight hours

Siem Day – This vessel will act as the Installation Support vessel, cable installation technicians will be deployed to the wind turbine generator foundation structures using the vessels’ motion compensated gangway system. The cable pulling equipment will be transferred onto the foundation structure and set up ready for the cables to be pulled into the structure and secured in the foundation basement. The motion compensated gangway system can be used for personnel and cargo transfers.

Seaway Aimery – This vessel will lay the inter array cable between adjacent foundation structures. Once the cable has been pulled in and secured at the first foundation, the cable will be surface laid to the second foundation, pulled in and secured. On completion of this operation the cable will be trenched to a pre determined depth utilising a remotely operated trenching vehicle.

The operations will be carried out in the following area as defined in the marine licence: L/2021/00335/1

The operations will be carried out using the Multipurpose vessel ROXANE Z, FLAG FR, IMO 9751456  Callsign FIRJ, specifications enclosed. 

Small assistance craft may be employed on site in a direct vicinity of the works.

In total 3 concrete mattresses of 6 x 3 x 0.3m will be installed. All mattresses will be fitted with artificial seaweed fronds. 

Please find attached the construction drawing for your reference. 

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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.

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

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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.

Diving operations will be carried out from the Capall Mara. These will include exposing the Horizontal Direct Drilling (HDD) exit points and preparation of the ducts ready for the submarine power cables. Diving operations will be carried out in the hours of darkness. A short safety message will be broadcast on CH16 warning of diving operations starting and ceasing.

The Celtic Mara will be carrying out Multi Beam Echo Sounder (MBES) surveys of the seabed and along the pre-cut trenches throughout the dredging activities. The survey gear will be positioned on a side mounted pole and extended into the water. Celtic Mara will make several passes over the area at a reduced speed. Celtic Mara will transit daily from Bridlington Harbour to the Capall Mara throughout the project.

During dredging and diving operations it is requested that The Capall Mara and Celtic Mara be given a 500m safety clearance zone. Diving flag ‘Alpha’ and the appropriate lights will be displayed during diving operations. The appropriate day shapes and lights will be displayed during survey operations

Both vessels will monitor VHF Ch 70 and 16 during operations.

20-05a-10Y (J2) well
20/05c-8X (H01) well
20/05c-9 (H02) well

The Fugro Pioneer will be surveying prescribed survey lines, which will require large turning circles. It is therefore requested that all vessels maintain a minimum 3000m separation distance from the survey vessel and pass at reduced speed.

Survey operations will be continuous, 24 hours a day, the vessel towing subsea sensors up to approximately 300m behind the vessel. 

During operations the vessel will be restricted in its ability to manoeuvre and will display the appropriate day shapes and lights.

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Equinor is planning to undertake a maintenance activity on the Sheringham Shoal windfarm using the Wind Enterprise Offshore Construction Vessel /Self Elevating Unit.

The maintenance  is planned to take place during February 2022 as per the attached notice.

Mariners should note that there is a mandatory 500m Safety Zone whenever the “Wind Enterprise” is alongside a turbine and a minimum 500m is also requested whenever the vessel can be observed afloat and manoeuvring into position.

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

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Please find attached a chart showing the results of the Greater Gabbard OFTO export cable survey. The chart lists the changes to the exposures on the three export cables, on the inshore section between KP 3 and KP 5 with a free span remaining around KP 4. Between KP 36 and KP 38 there are some exposed sections as the cables enter the site. In addition, although listed as exposures on the chart, there are areas of shallow burial at KP10 and a cable exposure on the interconnector cable within the site.

The exposed/shallow burial areas are shown as the coloured dots on the cable route highlighted in a black box.  Equitix (Greater Gabbard OFTO) have asked that all Fishermen operate with caution when fishing anywhere on the cable route and particularly the areas that are shallow buried around KP10.’

Coordinates of exposed/shallow burial areas are shown on the attached chart.

The OFTO is updating its risk assessments to determine the extent of remedial measures that may be required. Equitix intend to provide an update on remediation after the risk assessment exercise is complete.’

Please be advised that Fugro will be continuing to perform site investigation works on behalf of Inch Cape Offshore Limited. The works are to be carried out within the Development Area (see Figure 1 below) for the consented Inch Cape Offshore Wind Farm located within the Outer Firth of Tay.

The second phase of the site investigation works continue and are expected to complete by 28th February ‘22, weather permitting. The works will be undertaken primarily using the vessel Fugro Scout mobilising from the port of Aberdeen. The vessel will return to port periodically for a crew changes. To expedite the work a second vessel, Fugro Synergy, will be on site for a approximately 3 weeks on or after the 14th of January.

During the survey the vessel will be displaying the relevant RAM lights and displays during periods of restricted manoeuvrability. Whilst not recommended, vessels entering the survey area are requested to maintain a 500 m safety zone.

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Type See detailed map on our bulletin website

The guard buoys are yellow pillar shaped special marks, exhibiting a yellow St Andrews Cross day shape and radar reflector.  The buoys are each fitted with a yellow light, flash sequence: Fl (5) Y 20s 

The metocean buoys are 1.1 m diameter spherical buoys, fitted with a navigation light, flash sequence: Fl (5) Y 20s. 

Further details, including vessel informaiton, will follow ahead of deployment operations. 

Dates: Operations are expected to commence on Sunday 9th January, subject to weather, and throughout the month of January 2022.

A support vessel will escort the USV from the active ports to the port limits.

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

Figure 1 and 2 below indicate the operational area. The operational boundary is indicated in Tables 1 and 2 below also. In addition to the survey areas, the USVs will transit from Carlingford Lough (Ireland) or Douglas (Isle of Man) or Rhyl harbour.

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.

Safety Precautions: The USV is equipped with the following to make it conspicuous to other marine traffic:

• AIS
• Navigation Lights & Sound Signal
• Active Radar Reflector
• Superstructure Painted Yellow

Seafarers are asked to avoid contact with the vessel and be aware of the operational area during this period.      

Anchor Positions in WGS84

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Techniques used will be MBES/ROV/GVI/FMD/CP.

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Planned Plug and Abandonment (P&A) works are due to commence on the Leman 27C Platform (UKCS 49/27C) leaving around 12th March 2022.

Using vessel Guard Celena call sign : V7OY7. The survey vessel shall be towing a cable up to approximately 150m behind the vessel (the end marked by a tail buoy) at depths of up to 3m below sea level. The survey vessel shall have limited maneuverability so please allow a safe distance.

Company: Outer Dowsing Offshore Wind

Contractor: Enviros Survey & Consultancy Limited

Survey vessel : Guard Celena

Survey vessel call sign: V7OY7

Earliest start date: 10th August 2021 Latest finish date: 31st January 2022

It should be noted that the survey vessel shall be initially accompanied by a fishing vessel: Sorrento GY189 providing visual reconnaissance for any sea surface obstacles. Company : Outer Dowsing Offshore Wind

Contractor : NFFO Services Limited

Support vessel : Sorrento GY189

Support vessel call sign : 2XLE

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.

MV Fugro Searcher (Call Sign: 3EUY6) will be carrying out Drilling Hazard Site Survey (DHSS) work in the vicinity of the location noted below:

Start Date = 7th Jan 2022   DATE UPDATE:

Start Date = Updated to:  20th Jan 2022

Duration expected to be approx. 21 Days, until 10th Feb 2022

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Each ballasted frame weighs around 370kg, measures approximately 1.5m x 1.5m x 1.5m and is connected to a 100kg clump weight and remotely actuated pop-up buoy via a 100m wire ground line.

Once installed in the Morlais demonstration zone the frames will sit on the seabed at depths of at least 30m, with no surface infrastructure such as buoys or markers. Vessels will be able to pass safely through the area and above the frames. Use of static or mobile benthic fishing gear in the immediate area should be avoided to avoid the risk of snagging.

The positions listed here are as deployed.

• Updated restriction: https://kingfisherrestrictions.org/fishing-restriction-map?keywords=1545
• For further information contact your local IFCA office, details of which can be found here: https://kingfisherrestrictions.org/regulators-and-management-authorities

• Updated restriction: https://kingfisherrestrictions.org/fishing-restriction-map?keywords=2125
• For further information contact the relevant fishing office, details of which can be found here: https://kingfisherrestrictions.org/regulators-and-management-authorities

• Updated restriction: https://kingfisherrestrictions.org/fishing-restriction-map?keywords=skerries
• For further information contact your local IFCA office, details of which can be found here: https://kingfisherrestrictions.org/regulators-and-management-authorities

• Updated restriction: https://kingfisherrestrictions.org/fishing-restriction-map?keywords=1547
• For further information contact your local IFCA office, details of which can be found here: https://kingfisherrestrictions.org/regulators-and-management-authorities

The Shetland HVDC link is a critical electricity transmission link and will form part of the electrical transmission grid that is essential to the transport of renewable energy between the locations where it is generated and areas of demand, and the delivery of both Scotland’s and the United Kingdom’s 2030 climate change targets.

The vessel Seawell will utilise a grab, similar to the illustration in the attached NtM, to relocate the boulders. Boulders will be picked and relocated within the consented installation corridor, so that sufficient clear seabed is created for the safe installation of the cables. The locations of boulders picked and the location they are placed will be recorded.

Due to uncertain weather conditions the sequence of boulder relocation operations may require the vessel, SEAWELL, to move to Weisdale Voe, Shetland to undertake boulder relocation works earlier than previously notified. The vessel may begin works nearshore and move out offshore along the cable route from the 17 December 2021. An extension to the overall remaining boulder relocation works has also been updated within the attached NtM. The estimated completion date is now the 31 January 2022, please note that this date is subject to weather and operational uncertainties that could extend the overall duration to 14/02/2022, with the potential for further extension to the work duration.

This updated notice provides the coordinates and locations of the working area, with further details provided in the attached NtM. Indicative schedules for boulder clearance operations are provided below:

Boulder Clerance Activities are completed in the following areas;

• Area 1: (KP250 – KP225) 
• Area 2: (KP225 – KP200)
• Area 3: (KP200 – KP150) 

Boulder Clearfance Activities will continue in the following areas;

• Area 4: (KP150 – KP100) Start date: 22/11/2021 Estimated Completion Date: 31/01/2022
• Area 5: (KP100 – KP50) Start date: 22/11/2021 Estimated Completion Date: 31/1/2022
• Area 6: (KP50 – KP25) Start date: 22/11/2021 Estimated Completion Date: 31/01/2022
• Area 7: (KP25 – KP0) Start date: 17/12/2021 Estimated Completion Date: 31/01/2022

These dates are subject to weather and operational uncertainties that could extend the overall duration to 14/2/2022, with the potential for further extension to the work duration.

Please be aware that the Seawell will be restricted in her ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972). Masters of vessels are therefore requested to maintain their vessels at a minimum safe passing distance of 500 metres. The Seawell will display the appropriate shapes and lights in accordance with COLREGs Rules 16 and 18.

Legal Notice

Please be advised that this Notice to Mariners should be treated as official notice of the nature, duration and location of the works which are scheduled to take place. During the period of this notice, failure to remove equipment or entry into the identified location in a manner that would constitute a hazard to the operations described may be considered a breach of the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 (a breach of which can carry criminal sanctions). Additionally, should any failure to remove any equipment within the notified location, or the presence of any vessel, prevent, obstruct, or delay the works, Scottish Hydro Electric Transmission Plc may consider taking legal action to remove the obstruction and/or seek damages for any delay, in addition to any legal costs in doing so.

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Staff from the Scottish Association for Marine Science (SAMS) will deploy and recover three scientific moorings inside the Kincardine Offshore Wind Ltd. (KOWL) wind farm lease site, ~15 km offshore from Aberdeen. Original expected deployment duration was several weeks, from late October to late November / mid-December 2021. This has needed to be extended until mid-January to mid-February 2022 due to complications with recovery.

Moorings will contain passive acoustic recording equipment intended to record sound produced by operational wind turbines. Moorings will be located within the KOWL lease area boundary, at 200 m, 600 m and 2,000 m from one of the wind turbines, at water depths of around 80-90 m. Moorings will extend up to 110m along the seafloor using weighted lines, and will not extend more than a few meters into the water column (there will be no surface expression). Deployment and recovery will take place using a combination of ROV and acoustic release-based methods, using Moray First Marine Ltd. vessels 'Coral winds' and/or 'Waterfall' travelling from Aberdeen. Deployment and recovery activities of all three moorings are expected to be completed within a single working day (again, weather permitting).

As laid anchor pattern with rig in position attached, notice will be updated after rig departure to show only the remaining equipment.

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Permits to extend have been approved by OPRED.

If an opportunity to utilise a sutable vessel arises before the estimated date then this may be complete earlier. 

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On behalf of Seagreen Wind Energy Ltd, MHI VestasOffshore Wind will commence the installation and commissioning of 114 wind turbine generators.There shall be four vessels utilised during thisoperation.The Jack up Vessel Wind Ospreywill be the main installation vessel. Wind Osprey will transport the WTG components to site, jack up to the required height next to the foundation structure and install the WTG components.The Service Operation Vessel (SOV)Acta Centauruswill provide accommodation for the WTG commissioning technicians. Personnel will utilise the Acta Centaurus’s walk to work gangway system to access the WTG structures for commissioning activities.Two Crew Transfer Vessels(CTV’s), HST Euanand the HST Harriwill support the above two vessels during installation andcommissioning activities.The above vessels are expected to arrive at the Seagreen site on or around the 5thof December, WTG installation activities shall continue until late 2022.

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• Transit to Lancaster.
• Perform ROV as found survey
• Connect rigging equipment to wellhead protective structure (WHPS).
• Recover WHPS to vessel.
• Deploy and engage cutting tool on wellhead
• Perform wellhead cut 10ft below seabed.
• Recover cutting tool and wellhead.
• Perform ROV as left survey.
• Demobilise vessel.

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For periods between the active nearshore works (described in NtM LF500013-MIP-DOG-NOT0012), the temporary marker buoy will be positioned between the exposed ducts (as shown in the charts below). When the works vessels are on site, the buoy will be moved to the north of this location to allow work to continue.

On completion of all the nearshore works, estimated for end July 2023, the temporary marker buoy will be removed from site.

This NtM supersedes LF500013-MIP-DOG-NOT005 Rev02, issued on the 26th Aug 2021

The marker buoy characteristics are: Yellow Special Mark, light pattern: Fl(Y)5s

Mariners are reminded to navigate with caution, keeping a safe passing distance from the temporary marker buoy and keeping a continuous watch on VHF Ch. 70/16 when navigating the area.

A-2-Sea Solutions Ltd will be operating the vessel ‘Cerys Line’ on a 24-hr basis, sailing survey lines between 5-10 knots.

Cerys Line will not be towing any equipment and only hull mounted mutlibeam echosounder will be used.

Cerys Line will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

A-2-Sea Solutions Ltd will be operating the vessels ‘Morven’ and 'Noortruck' on a 24-hr basis. Both vessels will be underway throughout operations, sailing survey lines between 5-12 knots.

Both vessels will not be towing any equipment and only hull mounted mutlibeam echosounder will be used.

‘Noortruck’ and ‘Morven’ will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

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Metocean buoys have been successfully deployed within the Morgan and Mona project sites. The equipment will be maintained in position via appropriate mooring systems and will gather metocean data to inform the proposed Project. Details of the devices and relevant Aids to navigation in the attached NtM.

Two floating LiDAR buoys will be towed to the Mona Project site and the Morgan project site for deployment which is anticipated to commence in Q1 2022, and the vessel will be onsite for a maximum of 24 hours at each site.

The metocean buoys and floating LiDAR equipment will undergo regular scheduled maintenance during the operation period, where vessels may be onsite for 1 day at a time; further notice to mariners will be issued confirming the dates and maintenance activities. During the Floating Lidar servicing it will be towed to port for servicing prior to redeployment. Details of the anticipated scheduled maintenance dates are provided in Section 4 below, please note that these are currently the expected timings.

.

All vessels are requested to maintain a safe distance (500m) from the installation vessels (Vital or Vector) at all times. All vessels are requested to maintain a safe distance (200m) from the monitoring equipment at all times.

Further details can be found within the attached Notice to Mariners.

Floating LiDAR buoy

Morgan MMSI: 992351368

Mona MMSI:  992351369

Metocean buoys

 Morgan MMSI: 992351367

 Mona MMSI:  992351366

The Shetland HVDC link is a critical electricity transmission link and will form part of the electrical transmission grid that is essential to the transport of renewable energy between the locations where it is generated and areas of demand, and the delivery of both Scotland’s and the United Kingdom’s 2030 climate change targets. As part of the installation schedule Horizontal Directional Drilled (HDD) exit points have been installed at Noss Head by NKT, on behalf of Scottish Hydro Electric Transmission.

The HDD exit points are located approximately 400m offshore in around 20m depth of water. This Notice is issued to make mariners aware of the presence of three ducts protruding from the seabed at this location.

Three steel pipe ducts have been installed with trajectories that emerge from the seabed around 400m offshore. The ducts have been pushed out from each of the three HDD exit points and extend up to 4m into the water column at an angle of approximately 9º to the horizontal as shown in the diagram and illustrations within the attached Notice to Mariners.

The HDD installation operations are now complete, and the moorings and anchors used to assist with diving operations for the HDD installation activities have been fully recovered. Therefore, the HDD exit point area is no longer identified by marker buoys.

It is recommended that mariners make note of the HDD duct locations and remain vigilant of the seabed protrusions until June 2022, when further installation works are scheduled.

The moorings will have no surface marker, because they are in areas where there is considerable vessel traffic. They will extend vertically no more than 5 metres from the seabed.

The marine landfall works are ongoing with expected completion in UK waters by the end of April 2022. The marine landfall works covers cable relocation inside the pre-excavated trench and excavation works. Diving works, including inspection and preparation activities are also foreseen. Round Norwegian marker buoys will mark areas where spoil is temporarily left in place and poses a hazard to navigation.

The works are being managed by Prysmian PowerLink carried out by GPC Cumbria using the following vessels:

• Severn Supporter Call Sign: MHBD6 (Multicat) - support vessel.
• Vanishing point 2 Call Sign: 2FYL6 - for diving support & survey activities.

A dedicated guard vessel will be in position to guard the area at the landfall.

Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain a safe distance, approximately 1000m from the areas identified. Dive works will be ongoing and during the works the vessel will have restricted manoeuvrability as it completes its work scope.

The Communication between the vessels will be through CH67 & 72.

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

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Various free spans loacted outwith safe criteria, all details below. 

Free spans were identified at the following locations. 

Free Spans are found at the following locations 

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The LiDAR buoy will measure the wind conditions to provide valuable meteorological data to the offshore community that is needed for offshore wind resource characterisation

All locations referred to are outlined in Table 1 and displayed Figure 1 within the Notice to Mariners (provided as an attachment to this notice). These locations are all within the Berwick Bank Wind Farm (BBWF) in the outer Firth of Forth on the east coast of Scotland.

Expected arrival on site is 5th to 22nd November 2021 with the works completed the same day, weather conditions permitting. Therefore, we would like the validity period for this Notice to Mariners to be the 01 November 2021 – 30 November 2022 to allow for any eventualities during installation operations and also to cover any ongoing O&M activities throughout the deployment period.

On behalf of Seagreen Wind Energy Ltd, Seaway 7 will install grout to the Wind Turbine Generator foundation suction caisson voids within the Seagreen Site Boundary. The vessel EDT Hercules will transport the grouting mix to site and set up at the requisite foundation location. A grout hose will be connected to the suction caisson with the grouting mixture being injected into the caisson void. A remotely operated vehicle (ROV) will also be utilised in this operation.

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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.

We will be deploying three scientific Acoustic Doppler Current Profilers on the sea bed for 12 months from October 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.  Two of the instruments will be inside low profile trawl-resistant frame (Little Minch, west of Skye, and Linn Crowlin, east of Skye) and one inside a steel frame (Loch Erisort, east of Lewis).  See attachment for photos of the frames, a chart with their position and their positional details.

On behalf of Seagreen Wind Energy Ltd, Seaway 7 will install seabed scour protection rock to the foundation structures within the site boundary. The Flexible Fall Pipe Vessel (FFPV) Bravenes will transport and install the rock on the seabed using its flexible fall pipe system. This allows the scour protection to be installed with a high degree of accuracy. An ROV at the end of the fall pipe will be utilised to control the flow of rock to the seabed.

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In conjunction with the commencement of wind turbine generator foundation installation activities, Seaway 7 will deploy a site Guard Vessel on behalf of Seagreen Wind Energy Ltd. The vessel will be deployed on or around the 01st October and will make six hourly VHF radio broadcasts containing information regarding the Seagreen development, including installation activity, safety zone information and site demarcation buoyage information. The first guard vessel to arrive will be the Renown FR246.

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

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

Buoyage

Five special markers are now in position:

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

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

Fugro have deployed a SeaWatch LiDAR Buoy (SWLB); this is a sea state measurement instrument (referred to as ‘the equipment’). The deployment location is within the UK Sector of the North Sea off the north coast of Scotland.

• The equipment was deployed on 29 August 2021, and will be deployed for approximately one year.
• The equipment's location is provided within the attached Notice to Mariners.
• Scheduled maintenance of the equipment is planned every six months, but unforeseen maintenance may be required.
• The equipment has been moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.

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The Seagull Field is located on UK licence P1622 Block 22/29C. 17km south of the Eastern Trough area Project (ETAP) Central Production Facility (CPF). Neptune will develop the Seagull reservoir as a subsea tie‐back to existing seabed infrastructure over the BP operated ETAP CPF. The development is high pressure and high temperature and Neptune is the Operator for the subsea development. Neptune will also drill and complete the Seagull Wells and shall retain overall Project responsibility.

The Seagull development will require installation of new subsea equipment as follows: Four Xmas Trees; a 4 slot manifold; a 17km control umbilical (including hydraulic, electrical and chemical supplies) direct from ETAP to Seagull; a 5km 10” production pipeline; a 5km 3.5” wash water pipeline from Seagull to the existing Egret manifold; and a Wye manifold adjacent to the existing Egret manifold, through which the new Seagull production pipeline will connect with the Heron cluster pipeline system connected back to the ETAP CPF. From ETAP CPF Seagull oil and gas will be exported to shore through the GAEL and FPS pipeline systems to the Kinneil Terminal onshore.

We already have an ODA established covering the Seagull drill centre and the Egret manifold and would like to request to extend the ODA to incorporate the entire Seagull works area. The extended Offshore development area will be required commencing from September 2021 ‐ March 2023.

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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.

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

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  

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