News

The marine survey will be undertaken by GeoXYZ who are due to commence marine surveys on 21th May 2025. The scope of work comprises:

·        Unexploded Ordnance (UXO) Investigation Surveys (Magnetometer); and

·        Geotechnical Cone Penetration Testing (CPTs) and Vibrocores.

The UXO works are investigative in nature and are being carried out for the identification of potential UXO targets only. No UXO detonation or disposal activities will be undertaken as part of this programme.

Vessel descriptions and contact information are located in the attached Notice to Mariners.

The survey will involve the full coverage of dedicated survey lines with a geophysical survey system multibeam echo sounder and towed Sidescan Sonar.

As the Fugro Frontier will be line keeping, the vessel may require large turning circles and will be restricted in their 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. 

The vessel will be operating 24 hours per day and operating from the Port of Ijmuiden & Great Yarmouth throughout this period. 

The vessel shall be monitoring VHF 16 with further vessel details included within the attached NtM. 

Activity:

Operation of remotely piloted Uncrewed Surface Vessels (USVs) are planned in the Dutch North Sea sector, during April to June 2026. The vessels will be engaged in survey activities within the following offshore windfarms (OWF’s).

In addition to survey operations within the array areas of these OWF’s, survey activities will also be conducted along selected export cable routes connecting the windfarms to the Dutch coastline, as detailed below.

Duration:

Survey operations are expected to commence from 17th April 2026 for approximately 8 weeks, subject to weather and other operational factors.

 Location:

In addition to the survey areas outlined above, the USVs will transit from/to the prots of  Ijmuiden, Netherlands and Neeltje Jans, Netherlands.

Mode of Operation:

Although the USV are uncrewed, they are managed throughout the 24 hour operation, piloted remotely using 360 degree cameras and other navigational aids. 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. A support vessel will escort the USV from the active ports to clear water. Seafarers are asked to avoid contact with the vessel and be aware of the operational area during this period. 

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
• VHF

Greater Gabbard Offshore Wind Limited will be undertaking ROV and Seabed surveys at a number of assets within the windfarm. This works will include Unmanned Surface Vessel movements (Fugro Orca and Fugro Blue Voltra (eROV)) and Remotely Operated Vessels working underwater.

Survey Longitude LatitudeGAB011° 56.963' E51° 47.484' NGAC021° 57.750' E51° 47.670' NGAC041° 57.190' E51° 46.710' NIGB041° 52.433' E51° 55.872' NIGB051° 52.128' E51° 55.338' NIGC041° 53.309' E51° 56.082' NIGC051° 52.697' E51° 55.019' NIGD031° 54.791' E51° 57.348' NIGD051° 54.179' E51° 56.286' NIGD061° 53.873' E51° 55.758' NIGD091° 52.949' E51° 54.162' NIGD101° 52.643' E51° 53.640' NIGE081° 55.151' E51° 54.954' NIGE101° 54.479' E51° 53.891' NIGE111° 54.167' E51° 53.364' NIGE121° 53.831' E51° 52.836' NIGE131° 53.681' E51° 52.308' NIGF011° 57.005' E51° 56.748' NIGF061° 55.373' E51° 54.084' NIGF071° 55.043' E51° 53.556' NIGG021° 58.193' E51° 57.677' NIGG071° 56.260' E51° 54.287' NIGG081° 55.938' E51° 53.754' NIGH031° 59.051' E51° 57.161' NIGH071° 57.472' E51° 55.025' NIGH081° 57.144' E51° 54.492' NIGH101° 56.496' E51° 53.425' NIGI011° 59.885' E51° 57.702' NIGI021° 59.904' E51° 57.102' NIGI031° 59.015' E51° 56.274' NIGI041° 58.683' E51° 55.745' NIGI051° 58.361' E51° 55.218' NIGI061° 58.026' E51° 54.690' NIGI071° 57.707' E51° 54.156' NIGJ011° 59.896' E51° 56.476' NIGJ021° 59.565' E51° 55.943' NIGJ031° 59.246' E51° 55.422' NIGJ041° 58.919' E51° 54.888' NIGJ051° 58.594' E51° 54.366' NIGJ071° 57.959' E51° 53.286' NIGL021° 59.052' E51° 53.052' N

See detailed map on our bulletin website

Re-surveyed March 26

Please be advised that Jan De Nul Luxembourg S.A. shall be undertaking pre-lay bathymetric survey, 3rd party crossing identification; and subject to licensing, mattresses installation and subsea boulder relocation for the Skye-Uist Replacement project. This in preparation of installation of two new subsea power cables. One between Loch Pooltiel on the Isle of Skye and Loch Carnan on the Isle of South Uist and the other one between Ardmore on the Isle of Skye and Loch Pooltiel on Isle of Skye.

Scottish & Southern Electricity Networks (SSEN) wish to inform Mariners of the completion of marine works in the near-shore area off Warbeth, Orkney which forms part of the Orkney -Caithness HVAC Link  Project.  The completion of this work includes the installation of two subsea assets in the form of two ducts and associated rock bags approx 1km SW of Warbeth Beach, Orkney and have been placed with in the boundaries of the  4 points and associated coordinates  detailed in the attached NTM. The works have resulted in a reduction in charted water depth. 

 Mariners are advised to stay well clear of the area as detailed until further notice.

Scottish & Southern Electricity Networks (SSENT) will be as part of the Orkney HVAC Project will be undertaking MBES surveys  approx 0.31NM  off the coast of Dounreay  as detailed in the attached NTM. 

The vessel undertaking the surveys will be the C-SPARTAN. Vessels are requested to maintain a safe distance of 400 meters from the stated coordinates submitted.

The USVs will be mobilised from Scarborough where each USV will be escorted out of the harbour limits, before transiting to the survey area. Survey Operations will be continuous 24hrs a day. Although vessels are uncrewed, they are managed remotely continuously using 360-degree cameras and other sensors.

 The works will commence on the 21/05/2026, continuing until 31/07/2026 when all locations have been surveyed. The works will be continuous, 24 hours a day. A chart of the DBA, DBB and DBC Array Area including bounding coordinates is provided below. It is to be noted that we are surveying all Inter Array Cables (IAC) within DBA, Inter Array Cables (IAC) within DBB, all asset locations within DBC (95 x WTG’s and 1 x OSP) and the Export Cable route from DBA/DBB array areas to the landfall site south of Bridlington near Ulrome.

 It is requested that all vessels maintain a minimum of 500m separation distance from the USVs and pass at reduced speed.

Scope of Works: As part of Rampion’s requirements to satisfy the terms of the Deemed Marine License Order, Rampion will be carrying out post construction benthic ecology surveys at locations around the wind farm as shown below. The surveys are due to start on the 16th of May pending weather accessibility. 

Benthic Grab Sampling: A total of 28 grab samples shall be collected at locations around the windfarm and cable route at locations shown in figure 1 below and in appendix A. 

Drop Down Video: Drop Down Video surveys will be carried out across 15 transects, primarily along the cable route, however, a number of transects are located within the main windfarm area.  

The coordinates of the video transects are captured below in Appendix B. It is kindly request that fishing gear is moved from the transect lines so that quick and effective surveys can be completed. 

A follow up NTM will be issued once works are completed. 

All mariners and stakeholders are advised that Inch Cape shall commence construction support activities.

The multi purpose offshore vessel, Siem Barracuda shall support several foundation component completion work scopes. The vessel shall transfer technicians to foundation structures utilising it’s walk to work system, crew transfer vessels will also support these activities.

Siem Barracuda is expected to arrive at the wind farm site on or around the 21st of May to commence operations which will continue for several months, vessel detail in the attached Notice to Mariners

The survey will involve the full coverage of dedicated survey lines with a geophysical survey system multibeam echo sounder and towed Sidescan Sonar.

As the Fugro Frontier will be line keeping, the vessel may require large turning circles and will be restricted in their 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. 

Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be conducting ROV surveys and installing additional subsea cable protection between Coll and Tiree. Please refer to Figure 1 that shows the location of the planned works.

Please also refer to Table 2 overleaf that lists the coordinates for the area. 

The cable protection installation will take place with the CBS Hurricane and will consist of a ROV survey and Diving operations. 

Please refer to Table 1 that lists scope of work, estimated date range and the relevant vessels that will be utilised.  As work progresses, further updates will be provided.

GEOxyz will utilise the ‘Geo Ocean IV' to perform a Pre-Installation Survey within the East Anglia Three Offshore Windfarm. 

The vessel will conduct Multibeam Echo Sounder (MBES) and Side Scan Sonar (SSS) surveys of the WTG foundation locations, at a radius of 170m. 

The Multibeam Echo Sounder is hull mounted and the Side Scan Sonar is towed from the stern of the vessel at a height of 6.5m to 10m above the seabed. 

Geo Ocean IV is expected to mobilize from the port of ‘Lowestoft or Great Yarmouth’ circa the 21/04/2026. It is anticipated that the campaign will last approximately 15 days, the end of the campaign will be communicated by closure of this notice to mariners. 

Geo Ocean IV will monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operation. It is currently anticipated that weather permitting, works will be carried out on a continuous basis (i.e.,24- hour working, seven days a week) unless notified otherwise. 

The survey will involve the full coverage of dedicated survey lines with a geophysical survey system multibeam echo sounder and towed Sidescan Sonar.

As the Fugro Frontier will be line keeping, the vessel may require large turning circles and will be restricted in their 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. 

Njord Survey will carry out a non-intrusive marine survey along two offshore cable route sections between 21 May and mid-June 2026. The survey will use vessel-mounted multibeam echosounder (MBES) to collect seabed bathymetry and towed side-scan sonar, towed up to 200 m behind the vessel, to collect seabed imagery. Environmental observations will also be carried out at 12 stations using a drop-down camera system. 

Mariners are advised that RS-Geo, on behalf of Diamond Transmission will be undertaking survey work in the corridor from Hornsea 1 & 2 Offshore Wind Farm export cable – KP 2.0 – KP 7.6. This survey requirements plays a critical role in ensuring the ongoing maintenance and integrity of UK energy infrastructure. Mariners are advised to always maintain a safe distance of at least 500m from the survey vessel location.

Mariners are requested to observe a safe working distance of 500m when the Connector is performing geotechnical investigations of Cone Penetrating Tests, Seismic Cone Penetrating Tests and Vibrocoring at Awel y Môr Offshore Wind Farm. It is also requested that mariners observe a distance of at least 500m when Connector is manoeuvring into position for the safety of all sea users operating within the wind farm, and to ensure Connector can safely position itself without negative interactions with sea users or their equipment

Please be advised that there will be a short programme of work (approximately 24 hours excluding weather) at the Kincardine Field. The work will be inside the wind farm area and close to the floating assets. The scope of the operations is:o A debris and bathy survey.  

The work was expected to start in early May but is rescheduled to week commencing 18 May 2026.

Survey vessel will be EDT Hercules, which will be listening on channel 16 at all times.

Call sign: 5BAM4  IMO: 9491422  MMSI: 210776000

A scheduled service from an assigned pool of Platform Supply Vessels providing supplies to the Offshore Converter Platform & JUV until further notice.  Those nominated vessels are:

• Bos Pool;
• Bos Base;
• Dina Merkur;
• Dina Supporter;
• Dina Supplier;
• Dina Scout;
• Highland Knight

An eight legged jacket with 8 driven pin piles has been installed as a foundation for the OCP followed by the OCP itself.

The Sofia Offshore Wind Farm Boundary Co-ordinates where the works will take place are provided below.  All non-project vessels are requested to remain outside this area.

Mariners are requested to remain where possible 500m from vessels. During these works, SOVs will have restricted manoeuvrability and shall also be exhibiting the correct day shapes/ lights and flag for vessels engaged in diving operations and restricted in ability to manoeuvre.

Emergency Response & Rescue Vessel

The EERV Glomar Baltic is supporting the commissioning phase of the Offshore Converter Platform, providing close standby cover as required during overside works.

Service Operation Vessels

The Service Operations Vessel (SOV) “Purus Power” & Daughter craft “Purus Transporter” continues to support the SOWF project throughout the construction of the offshore windfarm.

The 'SOVs' ACTA Centaurus and Austri Enabler continues operations within the Sofia Array.

SOVs shall be transiting to / from the Sofia Array and the port of Blyth / Sunderland throughout this period.

Crew Transfer Vessel

The Crew Transfer Vessel (CTV) and MHO Gurli continue operations at the Sofia OWF.

All Mariners are advised to always give a wide berth of approx. 500m metres from the above vessels. The vessels shall be exhibiting the correct day signals / night lights for the operations as defined by COLREGS and can be contacted on VHF 16 for further information as required reference proximity / nearby operations etc.

Mariners are advised that a geophysical survey is planned for the Eastern Green Link 5 (EGL 5) project. The marine survey activities for EGL 5 are planned to commence on the 23rd of November 2025 and are expected to complete approximately May 2026. SSEN Transmission and National Grid Electricity Transmission (NGET) are working together to address the need for increased capacity within the transmission network between Scotland and England. EGL5 will help provide increased capacity, carrying up to 2 GW of electricity, enough for two million homes. This will be achieved through a High Voltage Direct Current (HVDC) cable connection between Aberdeenshire and Lincolnshire.The EGL 5 geophysical survey works are being carried out by Ocean Infinity Limited.The area of work, pertaining to this Notice to Mariners (NtM) for EGL 5, is highlighted in Figure 1, with the survey vessels contact details for the project found in Table 1. Contact details for the project Fisheries Liaison Officers (FLO) are detailed below.

Survey Activities: XOCEAN is planning the collection of geophysical data using remotely piloted Uncrewed Surface Vessels (USVs) along a proposed cable route corridor in Orkney, from the islands of Sanday to North Ronaldsay. The USVs are expected to operate out of Eday for the full survey duration. A mix of USVs with both hull mounted survey sensors (Multibeam Echosounders & Sub-Bottom Profilers) and also towed sensors (SideScan Sonar & Magnetometer) through the water in proximity of the seabed will be used. A crewed Support Vessel will be chartered throughout the survey to support the USVs with departures and arrivals from Eday and assist in towing them back in if a technical issue occurs. 

Dates/Duration: Operations commenced on 13 April 2026. It is expected that the survey activities shall be completed by 15th June 2026 (subject to weather). 

Survey Area: Figure 1 below indicates the operational area which is shown by the darker green area. This is outlined in Table 1 below also.  

Mariners are advised that Global Marine Systems Limited (GMSL), on behalf of SHEFA, will be undertaking the installation of the SHEFA-2 Fibre Optic Cable system in the North Sea. Operations are anticipated to take place in Q2 2026.

The vessels, CS Sovereign and Glomar Supporter, are undertaking underwater activities in the area and mariners should exercise caution and communicate with the vessel. 

The vessels will be limited in manoeuvrability therefore, vessels working in the area should proceed with caution within 1NM from the cable ships during operations and all activity should remain clear 250m either side of the vessels, 500m corridor in total.

The operational VHF channel for project vessels is Channel 70 and all vessels will monitor Channel 16. Vessels are encouraged to seek further information from local port authorities in areas of operations.

For updated details on vessel and schedule see attachment.

UPDATE: Note recent deployment of 2 rigging buoys. Glomar operations terminated.

SSEN Transmission and National Grid Electricity Transmission (NGET) are working together to address the need for increased capacity within the transmission network between Scotland and England. EGL5 will help provide increased capacity, carrying up to 2 GW of electricity, enough for two million homes. This will be achieved through a High Voltage Direct Current (HVDC) cable connection between Aberdeenshire and Lincolnshire.

The EGL 5 geotechnical survey works are being carried out by Ocean Infinity Limited.

The area of work, pertaining to this Notice to Mariners (NtM) for EGL 5, is highlighted in Figure 1, with the survey vessels contact details for the project found in Table 1. Contact details for the project Fisheries Liaison Officers are detailed in the attached NtM.

Please note, this survey will be able to operate around static fishing gear. Therefore, fishing gear clearance is not being requested.

Navigational Safety Advice:

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.

The geotechnical survey works are being carried out by Ocean Infinity Limited and Geoforce using the following vessels:

Survey vessel: A7803 (IMO 9924261; MMSI 563175900; Call Sign 9V8529)

Phase 1 of the survey will involve the full coverage of dedicated survey lines with a geophysical survey system multibeam echo sounder.

Phase 2 of the survey will involve drop down camera environmental assessment.

During both phases of the survey the Fugro Seeker will be slow moving and with limited manoeuvrability.

Other vessels are requested to maintain an appropriate and safe distance of 500m when passing the Fugro Seeker.

The Fugro Seeker operates on a 12h basis during daylight hours.

The following table highlights WTG installation progress and next 7 day forecast.

Vessels operational during these works are as follows:

The exact finish date will be dependent on the prevailing weather conditions and work progress. Mariners are requested to remain where possible 500m from Construction vessels when exhibiting the day shapes / night lights for vessels restricted in their manoeuvrability.

Service Operation Vessels

The Service Operations Vessels (SOV) “Purus Power” & Daughter craft “Purus Transporter” continues to support to the SOWF project throughout the construction of the offshore windfarm.

The SOV 'ACTA Centaurus' and 'Austri Enable continues operations within the Sofia Array.

SOVs shall be transiting to / from the Sofia Array and the port of Blyth / Sunderland throughout this period.

Crew Transfer Vessel

The Crew Transfer Vessel (CTV) MHO Gurli continues operations at the Sofia OWF.

All vessels can be contacted on VHF 16 throughout as required. All vessels shall be operating to / from the Port of Hull and will be operational 24 hours / day.

16/04/2026 UPDATE – additional guard vessels are now included within the c. 21 day guard vessel rotation, please see refer to the updated PDF for vessel details.  

It should be noted that SSE Renewables are not expecting fishers to relocate gear - on this occasion the vessels will aim to work around any gear on location. A scouting/guard vessel will also be contracted to operate ahead of the survey vessels to ensure that this can be achieved. There will be no towed gear as part of this survey. 

The Zenith and Quest (operated by Fugro) will commence operations on 6th April and 25th April, respectively, for a duration of 207 survey days. To account for weather delays and other eventualities, we would like to extend the validity of this notice until 30 November 2026. 

The guard vessel will be either the Tranquillity S or the Reaper alternating approximately every 21 days

There is an an intermediate peripheral structure within the Beatrice windfarm with a marine lantern that is unlit.

This structure (BE-D11) is on the Western boundry of the Beatrice windfarm.

Mariners are requested to observe a safe working distance of 1000m when the Ramform Vanguard is performing towed survey activities at Awel y Môr Offshore Wind Farm. It is also requested that mariners observe a distance of at least 500m when Ramform Vanguard is manoeuvring into position for the safety of all sea users operating within the wind farm, and to ensure Ramform Vanguard can safely position itself without negative interactions with sea users or their equipment. The towed equipment extends approximately 350m behind the stern.

During OEG's return scope on EA2 with the Northern Victoria the vessel will be carryong out the following scopes...

Archaeology relocations

There is a total of 23 archaeology targets to be relocated. Of these several will be recovered to deck for further investigation and recording prior to being relocated in new position on seabed. 

This scope will be carried out between 17th April and approx 30th April. 

EOD disposals 

There is a total of 23 confirmed UXOs that are to be disposed of using Low Order techniques. No Height Order disposal will be carried out. Security broadcasts will be made at certain times around disposals to all vessels in the area to keep their distance. 

This will be carried out between approx 1st May and July 2026

OEG is required to conduct noise monitoring of the first 10 UXO Low Order deflagrations. To ensure that OEG abides by consents documentation the noise monitoring placements have been put in to x3 groups. 

Group A noise placements

Group B noise placements 

Group C noise placements 

Upon completion of these noise monitoring operations an updated kingfisher bulletin will be issued. 

Fishing Net relocations

At suitable times during the above EOD scope there are x5 fishing nets which are to be either recovered to deck or relocated. 

This will be carried out between approx 1st May and June 2026

Debris relocations

A total of 52 ites of debris are to be relocated following the above disposal scope and fishing net recovery. This will be carried out out using combination of orange peel grab, ROV and ROV/SMT. 

This will be carried out between June and July 2026

Please be advised that Socotec Land & Hydrographic Surveys (on behalf of SHEPD) will be undertaking subsea inspections across the Argyll & Bute Marine area. Please refer to Figure 1 - Figure 5 that highlights each cable location.  Given the different conditions and water depths anticipated at each site, a range of vessels will be available for the project, detailed overleaf.

  Please be advised that Socotec Land & Hydrographic Surveys (on behalf of SHEPD) will be undertaking subsea inspections across the West Highland marine areas. Please refer to Figure 1 - Figure 4 that highlights each cable location.  Given the different conditions and water depths anticipated at each site, a range of vessels will be available for the project, detailed overleaf.  The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates listed in Table 1.  

1.       All mariners are to be advised that there will be a power outage at Aberdeen Bay Windfarm for approximately 5 days 25/05/26 08:00  -  29/05/2026  16:00. This is due to maintenance of the national grid. During this period navigational aids may be disrupted on the Wind Turbine Generators (WTG’s) Please navigate with extra caution during this period.

1.1   Area of operations:                                        WGS84

Latitude               Longitude

·         Aberdeen Bay Windfarm              57° 13.470' N    1° 59.239' W

1.1.2 Schedule

DATE OF OPERATION START: 25/05/2026

TIMES OF OPERATION: 24hrs

LENGTH OF OPERATION: 5 days

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:

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

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.

Activity:

Operation of remotely piloted Uncrewed Surface Vessels (USVs) are planned in the UK and Danish North Sea sectors, from mid-May 2026. The vessels will be engaged in survey activities between Hunmanby Gap, UK and Henne Strand, Denmark on behalf of Woodstock Cable Limited.

Dates & Duration:

Survey operations are expected to commence from 13th May 2026 for approximately 4 months, subject to weather and other operational factors.

 Location:

The survey area comprises an approximate 300m wide survey corridor between Hunmanby Gap, UK and Henne Strand, Denmark. The USV is expected to be operating within +/- 150m of the centreline route. In addition to the survey area, the USVs will transit from/to the ports of Scarborough, UK, Esbjerg, Denmark & Hvide Sande, Denmark.

Vessels:

It is expected there will be up to four USV operational at any one time. Vessels will be a combination of XOCEAN’s XO-450 & XO-580 class USV’s. 

Mode of Operation:

Although the USV are uncrewed, they are managed throughout the 24 hour operation, piloted remotely using 360 degree cameras and other navigational aids. 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. A support vessel will escort the USV from the active ports to clear water. Seafarers are asked to avoid contact with the vessel and be aware of the operational area during this period. 

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
• VHF

A total of 32 construction boundary demarcation buoys will remain in location until the windfarm construction activities have been completed and handed over to the Operations and Maintenance teams.

Once the permanent Aids to Navigation (AtoN) have been installed on the WTGs, Trinity House will approve the permanent AtoN and the boundary buoys will be removed.

If anyone finds a buoy that is off station or encounters a buoy location where it is not functioning or is missing, they should report this to the Dogger Bank Duty Marine Coordinator as soon as possible.

Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be conducting ROV surveys and installing additional subsea cable protection between Coll and Tiree. 

The cable protection installation will take place with the CBS Hurricane and will consist of a ROV survey and Diving operations.

Work DescriptionDuring operations the CBS Hurricane vessel will be restricted in their ability to manoeuvre due to ROV and Diving operations taking place. Whilst operations will seek to minimise disruption on the width ofthe main navigation channel, some disruption may be unavoidable during operations within the working corridor.

Operations will be conducted over 12 hours and are weather/tide dependent.

Should any vessel wish to come within 500m of the vessels, then direct communication with the Master / Operator is required. Vessels will display the appropriate lights/day shapes for their operations.

On behalf of Inch Cape Offshore Ltd, Enshore Subsea Ltd, shall commence export cable 2 installation operations. 

Export cable 2 shall be installed in three sections commencing with section 2, location and coordinates shown in the attached notice to mariners.

The installation vessel, CMOS installer is expected to arrive at the export cable corridor to commence pre lay survey on or around the 8th of May with cable installation commencing on the 10th of May. 

Surface laid cable shall be monitored by guard vessels as promulgated in the Inchcape weekly notice of operations.

On behalf of Inch Cape Wind Ltd. Jan de Nul will commence the installation of wind turbine generator foundation monopiles. The monopile components will be transported from the Port of Leith to the Inch Cape site and installed at 54 locations within the wind farm boundary.

The installation vessel Les Alizes is expected to arrive at Inch Cape to commence operations on or around the 25th of December. Each monopile will be installed with a lit temporary navigation structure, the light shall exhibit Flashing (Fl) Yellow (Y) 2.5 seconds (s) 

Monopile installation is expected to continue until June 2026.

A marine geotechnical survey is due to be undertaken for the proposed Morecambe Offshore Wind Farm project. The survey will be carried out from one survey vessel, FUGRO VOYAGER, and will involve geotechnical investigations to assist with the development of design for the Morecambe Offshore Wind Farm project.

Prysmian on behalf of the Eastern Green Link 2 subsea cable project will be conducting geophysical and geotechnical surveys. Survey activities are due to commence on the 7th May 2026, and the surveys are expected to be completed on the 28th May 2026, subject to weather. 

Clump weight is 2500kg, approximately 0.75m^3 and lies <1m on the seabed.

See detailed map on our bulletin website

Please see the attached Notice to Mariners for full details

ROV Inspections of foundations across 18 WTG locations.

Please note the following exclusion zones for the works

• 250m exclusion – All Assets
• 500m exclusion – Around the vessel during cable inspections to be completed on the 8th & 9th May pending weather
• 1000m exclusion – Around the vessel during the OSP to F3C cable inspection to be completed on the 10th May pending weather

Operation of remotely piloted Uncrewed Surface Vessels (USVs) are planned in the southern North Sea, UK, during April and May 2026. The vessels will be engaged in survey activities on behalf of Sheringham Shoal and Dudgeon Extensions ProjCo Limited in the nearshore area of Sheringham (0-12 LAT) as outlined in Figure 1. It is expected there will be two USVs operational at any one time. Dates:  Survey operations are expected to commence from 14th April 2026 until the end of May 2026, subject to weather and other operational factors.

The GVI survey shall evaluate the extent of corrosion, identify any damage and assess the overall integrity of the primary and secondarysteelwork elements, covering the following jacket segments and other structural components: • Jacket members in splash zone • Allhorizontal, vertical, diagonal structural members • Installed Galvanic anodes • Structural clamps and connections • Mud mat and leg pilescour All items and components/elements below are to be covered under the scope of this survey: • Corrosion damage in terms of wearand rust • Localised corrosion damage in terms of pitting holes and major cracks • Member severance or missing members • Memberbuckling • Member denting or any other plastic deformation

• Inspection of all J tubes and risers • Partial or full detachment of anode–cast system from the structure • Missing or damaged anodes •Presence of debris trapped within the structural members of the foundation • Evidence of scour around the foundations and/or J tubes •Evident excessive marine growth attached to the structure • Gross paint coating damage; flaking, blistering, etc. in the painted tubularmembers (where possible due to the expected attachment of marine growth) The inspection of the selected areas shall include but not belimited to the following checks: • Gross extent of fatigue damage. • Visual signs of surface breaking cracks initiation and growth. • Lengthof surface–breaking fatigue cracks

As part of the planned geophysical survey within the GWYNT Y MOR WINDFARM, we are committed to ensuring the protection andpreservation of the marine environment in line with relevant regulatory and environmental standards. The area in and around GWYNT Y MOR is a vitalecosystem supporting diverse marine life, including species of fish, seabirds, and marine mammals.Therefore, strict measures will be implemented to minimize any potential environmental impacts.

Here are the key legislative frameworks impacting geophysical survey operations in the marine environment: 1. Marine and CoastalAccess Act 2009 2. EU Habitats Directive (92/43/EEC) 3. EU Birds Directive (2009/147/EC) 4. Environmental Impact Assesment (EIA)Directive (2011/92/EU) 5. UK Wildlife and Countryside Act 1981 6. Marine Strategy Framework Directive (2008/56/EC) 7. Outer ThamesEstuary Special Protection Area (SPA). 8. International Maritime Organization (IMO) Guidelines Practical considerations for complianceinclude: 1. Marine Licensing and Permits 2. Environmental Impact Assessments 3. Habitat and Species Protection 4. StakeholderEngagement 5. Monitoring and Reporting 6. Training and Awareness Survey operations are subject to a robust regulatory frameworkdesigned to protect the marine environment and ensure sustainable use of resources. Compliance with these regulations requires carefulplanning, comprehensive impact assessments, and proactive

Mariners and their equipment are requested to observe a safe working distance of 500m from the specified infrastructure locations (table below) at all times for the duration of the project, unless otherwise communicated by Humber Gateway.  

Work Locations

It is also requested that mariners observe a distance of at least 500m when WIND PIONEER is manoeuvring into position for the safety of all sea users operating within the wind farm and to ensure WIND PIONEER can safely position itself without negative interactions with sea users or their equipment. In order to minimise the risk of negative interactions, fishing gear, markers and anchors should also observe this safe working distance of 500m where works occur. 

The Wind Pioneer will be accompanied by the following windfarm support vessels throughout: WINDCAT 31 - Callsign 2GBN9 MMSI - 235097407 WINDCAT 33 - Callsign 2HER9 MMSI – 235103062 WINDCAT 1 - Callsign - MFFA6 MMSI – 235018872

CTVs will be regularly on site and mariners should keep a safe working distance of 150 m from these vessels where possible.  All mariners are requested to contact project Marine Coordination and monitor VHF CH16 when navigating or operating in the vicinity of the wind farm.  

THE ENERGY ACT 2004

NOTICE OF APPLICATION FOR SAFETY ZONE SCHEME DURING MAJOR MAINTENANCE OF THE WESTERMOST ROUGH OFFSHORE WIND FARM

THE ELECTRICITY (OFFSHORE GENERATING STATIONS) (SAFETY ZONES) (APPLICATION PROCEDURES AND CONTROL OF ACCESS) REGULATIONS 2007 – STATUTORY INSTRUMENT 2007 NO 1948

Notice is hereby given that Westermost Rough Limited (company number 06232914), with registered offices at 5 Howick Place, London, England, SW1P 1WG have applied for consent from the Department for Energy Security and Net Zero as set out in the Energy Act 2004 and the Electricity (Offshore Generating Stations) (Safety Zones) (Application Procedures and Control of Access) Regulations 2007 (SI No 2007/1948) for safety zones for the operational Westermost Rough Offshore Wind Farm during periods of major maintenance.

The application is for 500m safety zones around any Wind Turbine Generator or Offshore Substation Platform where major maintenance is being undertaken during the operational phase (where ‘major maintenance’ is as defined under the Electricity Regulations 2007 (SI No 2007/1948)).

Further details are provided in the supporting safety zone application, for which a request may be made for a copy by email to CAMEM@orsted.com and CAVAL@orsted.com (referencing ‘Westermost Rough Safety Zone Application’ in the subject line).

Any person wishing to make representations to the Secretary of State about the application should do so by email to the Secretary of State, Energy Infrastructure Planning Team, Department for Energy Security and Net Zero at energyinfrastructureplanning@energysecurity.gov.uk stating the name of the proposal and nature of their representations, not later than the 28th of May 2026.

Galloper NtM 07-2026  Confirmed Cable Exposure within Galloper Windfarm 28 locations identified following SubSea Surveys in 2025 / 2026

Balance of Plant (BoP) operations will be carried out by the DP2 vessel, Voe Vanguard which is expected to arrive at the Moray West site 6th May 2026. General visual inspection, via ROV deployment, of the asset foundations will be carried out on all 60 WTGs, with the inspection period covering approximately 16 days (12 days work and a contingency for weather downtime). Works will take place within the Moray West red boundary (Figure 1) and are scheduled to occur on a continuous 24-hour basis.

SSEN Transmission conduct marine surveys to gain information on seabed morphology, installation design, sediment structure and to gain benthic characterisation and habitat mapping.  The survey will be conducted by GEOxyz, on behalf of SSEN Transmission. The surveys are scheduled to commence inside of Yell Sound on 1st of May 2026. It is expected that all survey works will be completed by 31st of May 2026. This survey campaign will include use of the following equipment to develop benthic characterisation and habitat mapping:

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea inspections in the Argyll marine areas. Please refer to Figure 1 - Figure 2 that highlights each cable location. 

Given the different conditions and water depths anticipated at each site, a range of vessels will be available for the project, detailed overleaf. 

The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates listed in Table 1. 

Mariners are advised that a geophysical survey is planned for the Eastern Green Link 5 (EGL 5) project. The marine survey activities for EGL 5 are planned to commence on the 12th of January 2026 and are expected to complete approximately May 2026.

Eastern Green Link 5 Geophysical survey area consists of multiple Notice to Mariners referenced below (this notice is highlighted in bold):

NtM_EGL5-SSEN-MAR-XX-CO-MC-004

NtM_EGL5-SSEN-MAR-XX-CO-MC-001 - Geophysical survey area outside 12nm

EGL5-SSEN-MAR-XX-CO-MC-002 – Geotechnical survey area outside 12nm

SSEN Transmission and National Grid Electricity Transmission (NGET) are working together to address the need for increased capacity within the transmission network between Scotland and England. EGL5 will help provide increased capacity, carrying up to 2 GW of electricity, enough for two million homes. This will be achieved through a High Voltage Direct Current (HVDC) cable connection between Aberdeenshire and Lincolnshire.

The EGL 5 geophysical survey works are being carried out by Ocean Infinity Limited.

The area of work, pertaining to this Notice to Mariners (NtM) for EGL 5, is highlighted in Figure 1, with the survey vessels contact details for the project found in Table 1. Contact details for the project Fisheries Liaison Officers (FLO) are detailed below.

The metocean instrumentation was intended to be deployed at 4 locations along the proposed Morven wind farm export cable route. The now cancelled deployment locations are shown in Section 2 with charts included in Section 3.  Equipment associated with this survey included seabed frames, metocean instrumentation, ground lines and secondary anchor weights. 

The superceded NtM (Morven_NtM 007_v02 Cable Route_ Metocean Intrumentation_ Deployment) has been attached to this notice for reference alongside the updated NtM (Morven_NtM 007_v03 Cable Route_ Metocean Instrumentation_ Deployment). 

The works, managed by Prysmian are expected to start on or around the 1st May 2026 and are expected to last 31 days, with a completion date around the 31st May 2026 (weather dependent).  Vessels, when transiting are requested to pass at a safe speed and distance, and fishing vessels are advised to remain at a safe distance of at least 500m from the vessels identified. Survey works will be ongoing and during the works the vessel Scheldeoord will have restricted maneuverability as they complete their work scopes, which includes vessel mounted excavator operations The vessels during this works will not be towing any survey equipment. 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.

The CSOV ‘GRAMPIAN EAGLE’ will provide accommodation and Walk-to-Work access during the commissioning phase of the East Anglia THREE Offshore Converter station (OFCS).  

‘GRAMPIAN EAGLE’ will perform crew transfers and deliver supplies to the East Anglia THREE Offshore Converter station (OFCS)  and the jack-up vessel ‘JB 120’ (as long as installed next to the OFCS). 

‘GRAMPIAN EAGLE’ will make regular transits between the East Anglia THREE Offshore Windfarm and the port of Lowestoft (UK). The vessel is equipped with VHF multi-channel radios and mobile phones. 

It is currently anticipated that weather permitting, operations will be carried out on a continuous basis (i.e. weekly, bi-weekly, on request) for the duration of circa 2.5 months. Crew change will be carried out every 14 days either by helicopter, CTV or port call. 

Completion of works will be notified by closure of this notice to mariners, weekly updates of vessel movements will be notified via EA3 Weekly Notice Of Operations. 

Mariners are advised that a marine geophysical survey will be conducted in offshore areas and coastal sea waters between Shipwash East offshore area the Outer Pegwell Bay, Ramsgate, Kent in the corridor as shown in Figure 1 of the NtM.  

The survey is being undertaken on behalf of National Grid’s Sea Link Project. 

The survey campaign is planned to on the approximately 17th April and extend throughout June, depending on weather conditions, but may be subject to change. 

Reach Subsea UK LTD are conducting a survey campaign on behalf of Scottish Hydro Electric Transmission Plc. Trading as Scottish and Southern Electricity Networks Transmission (SSENT). SSEN Transmission plan to commence the marine survey inside 12nm on 28th March 2026.  The survey equipment will consist of Multi Beam Echo Sounder (MBES), Side Scan Sonar (SSS), Sub-Bottom Profiler (SBP), Magnetometer, Benthic grabs, Vibrocores and Core Penetration Tests across 2 different vessels that will likely be no further inshore than 15m LAT. The survey equipment will also require calibration testing, which may be conducted outwith the survey corridor.

A service has been completed on the Passive Acoustic Monitoring (PAM) Stations that have been deployed on the seabed, in and at locations around the East Anglia THREE Offshore Windfarm Area.  A total of eleven PAM stations have been re-deployed, two of which are marked by surface buoys. 

The PAM stations will remain on the seabed until approximately 31/10/2027, 9 deployed PAM stations have a 12 m height above the seabed, a weight of 600 kg and their location is not marked by a surface buoy. Two deployed PAM stations are marked by surface buoys, each anchored to the seabed by two 2 tonne anchor mooring weights.

The PAM stations will be serviced periodically with information distributed via future Notice to Mariners. There is an exclusion zone of 250m around each PAM Station, Marine traffic is advised to maintain the safety zone and navigate with caution at all times. 

Cable laying operations will continue to be conducted within the East Anglia THREE Offshore Windfarm by CLV Seaway Phoenix. The vessels will install subsea cables between WTGs and the Offshore Converter Station (OFCS). The Grand Canyon 3 will conduct trenching and burial operations supporting the Cable-Laying operation. During cable deployment, trenching & burial, both the vessels will be restricted in their ability to manoeuvre.The Seaway Phoenix will carry out cable laying activities, and be supported by the Seaway Moxie & Windea Clausius, which will both undertake equipment and personnel transfers to WTGs and the OFCS via a Walk to Work (W2W) gangway system. While conducting these transfers, the Seaway Moxie & Windea Clausius will also be restricted in manoeuvrability.

For further information regarding Inter Array Cable Installation Operations, please see attached East Anglia THREE Notice To Mariners 006-2026 Inter- Array Cable Installation.

During recovery operations following completion of metocean data collection at the Muir Mhor site, the seabed frame was unable to be recovered. Seabed frame recovery was not possible due to transponder onboard vessel being unable to make a connection with acoustic receiver on the seabed frame. It is not yet confirmed whether the seabed frame is in the deployed location and is simply damaged, or whether it has been moved. 

See attached photo for details of the frame.

Last known location of the seabed frame is the deployed location as per coordinates given in this notice.

Report has been made to Marine Directorate on 22/07/2025. Further updates on recovery will be posted to a separate notice (ID-5431).

Search operations were undertaken in March 2026; object not located. Further update to follow.

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning as part of the annual operations and maintenance of assets, general visual inspection of the asset foundations (Table 1 and Figure 1). Asset foundation inspections will be carried out by the Voe Vanguard which is expected to be on site from 20th April to 25 July 2026. Works will be completed at all 100 WTG within the red boundary in Figure 1.

Please be aware that, during the survey activities, by virtue of its mode of operation the vessel (Voe Vanguard) will be Restricted in her Ability to Manoeuvre (RAM) 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 passing distance from the vessel of 500 metres when it is undertaking work and showing the appropriate shapes and lights in accordance with COLREGs Rule 27.In order to not compromise the safety of the Survey Vessel, their crew, and their ability to undertake its contracted works, fishermen who have static fishing gears deployed within 500 m from the WTG where survey activities are planned (see Table 1 and Figure 1) are requested to provide the coordinates of such deployed gears in DMS and details of whether the surface markers used are visible at all states of visibility to Alex Winrow-Griffin (Brown & May Marine) using the contact information below (Section 58 of the Merchant Shipping Act 1995).Fishermen who have static gears deployed beyond 12 nm are reminded that static gear must be marked in accordance with Commission Implementing Regulation (EU) No. 404/2011 (https://www.gov.uk/guidance/marking-of-fishing-gear-retrieval-and-notification-of-lost-gear#marking-of-fishing-gear)

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake geophysical surveys within the site boundary (Table 1 and Figure 1). Survey operations will be carried out by the Geosurveyor XI which is expected to be on site from 15th April to 25th May 2026. The survey will take place within the red boundary in Figure 1.The geophysical survey scope will include Multibeam Echosounder (MBES), Side Scan Sonar (SSS) of a maximum of 50 m width at 22 inter-array cables and 2 interconnector cables, and a 300m2 area around 30 WTGs and 3 OSP locations. The coordinates of the work site boundary are presented in the below Table 1 and shown in Figure 1.

1. General Safety AdvicePlease be aware that, during the survey activities, by virtue of its mode of operation the vessel (Geosurveyor XI) will be Restricted in her Ability to Manoeuvre (RAM) 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 passing distance from the vessel of 500 metres when it is undertaking work and showing the appropriate shapes and lights in accordance with COLREGs Rule 27.In order to not compromise the safety of the Survey Vessel, their crew, and their ability to undertake its contracted works, fishermen who have static fishing gears deployed within 500 m from the WTG where survey activities are planned (see Table 1 and Figure 1) are requested to provide the coordinates of such deployed gears in DMS and details of whether the surface markers used are visible at all states of visibility to Alex Winrow-Griffin (Brown & May Marine) using the contact information below (Section 58 of the Merchant Shipping Act 1995).Fishermen who have static gears deployed beyond 12 nm are reminded that static gear must be marked in accordance with Commission Implementing Regulation (EU) No. 404/2011 (https://www.gov.uk/guidance/marking-of-fishing-gear-retrieval-and-notification-of-lost-gear#marking-of-fishing-gear) 

Survey operations will be carried out by the Geosurveyor XI which is expected to arrive at the Moray West site 16th April. Geophysical surveys are programmed to be carried out along the Moray West Offshore Export Cable (OEC) on 17th-18th April. The vessel will then proceed to Moray East to survey the windfarm assets, before returning to the Moray West site to complete the geophysical surveys across the rest of the site (around turbines and inter array cables).

The geophysical surveys within the OEC are anticipated to take one day and will be carried out during daylight hours only. Survey operations within the OEC will be able to work around any fishing gear sighted from the vessel. It is anticipated that the vessel will resume work on the Moray West site on approximately 3rd May, with the survey period covering approximately 38 days (16 days of work and a contingency for weather downtime/ delays on Moray East). Works within the Moray West red boundary (Figure 1) will take place throughout a 24-hour period.

The westerly exposure is 26m long, the easterly is 27m long.

Sub-Sea Export Cable Repair - N-Sea - will act as the principal contractor using the dedicated DP2 Vessel ‘GEOQUIP ELENA’

‘GEOQUIP ELENA’ can be expected to arrive on-site on or around Saturday 18th. April (picture along with vessel details are on page 3 of the attached notice)

PLEASE READ THE ATTACHED NOTICE

All MARINERS PLEASE NOTE THAT AT ALL TIMES WHILE ON-SITE TO AFFECT REPAIR ‘GEOQUIP ELENA’ WILL BE RESTRICTED IN HER ABILITY TO MANOEUVRE

THEREFORE, WHENEVER THIS VESSEL IS ON-SITE A WIDE BERTH, MINIMUM 500 METERS, IS REQUESTED AT ALL TIMES AND PASSING VESSELS ARE REQUESTED TO REDUCE SPEED IF POSSIBLE.

Small chartlets included with the NtM show the coordinates and the route of the Barrow Export Cable running along the seabed

IN THE LEAD UP TO AND FOR THE DURATION OF THIS SURVEY/REPAIR FISHERMEN ARE REQUESTED, AND ADVISED, NOT TO SET ANY GEAR CLOSE TO OR ALONG THE LENGTHS OF THE CABLE SHADED RED ON THE CHARTLETS - PAGES 2 & 6 - ON THE ATTACHED NOTICE.

PLEASE RE-LOCATE ANY GEAR ALREADY IN CLOSE PROXIMITY – IF IN DOUBT PLEASE CONTACT ME

‘GEOQUIP ELENA’ will keep a listening watch on VHF Channels 16 & 12 and can be contacted for information relating to vessel movements only.

 PLEASE READ THE NOTICE

Page 2 : General information along with two small chartlets showing route of BARROW EXPORT CABLE 

Page 3 : Pictures and details of GEOQUIP ELENA

Page 4 : General schedule of repair works – plus General Safety Advice

Page 5 : Contractors contact details (if required)

Page 6 : Small Chartlet showing ‘work area’ along with co-ordinates

Please do not hesitate to contact me if you are unsure about any of the above or require any further information, also please pass this information to any of your colleagues who you think might be interested.

 If you know of any fisherman who works the area and does not receive this information or anybody else who would benefit from this information please let me know.

……………………………………………………………………………………………….

 If in any doubt please contact me

 Regards  :  Tom Watson

Tel………..  Mobile 07903 173 624

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking a subsea inspection in the Outer Hebrides marine area. Please refer to Figure 1 that highlights the location. 

Given the different conditions and water depths anticipated on site, a range of vessels will be available for the project, detailed overleaf. 

The inspection works will be centred on a 50m cable corridor, defined by the start and end coordinates listed in Table 1.

IWS Windwalker and supporting CTVs will commission 95 WTGs at the locations set out in section 2.2 ofEAT NTM 008-2026 Wind Turbine Generator Commissioning Campaign.Installed WTGs shall be marked with the following aids to navigation:LightsFl Y 2.5s light (visible through 360°)Minimum 2 nm range

Partially constructed monopiles shall be marked with the following aids to navigation where a transition piecehas not been installed:

LightsFl Y 2.5s light (visible through 360°)Minimum 2 nm rangeWeather permitting, offshore works will be carried out on a continuous basis (i.e. 24-hour working, seven daysa week).During operations, the IWS Windwalker will have restricted manoeuvrability as defined under COLREGS(International Regulations for Preventing Collisions at Sea, 1972). They will display the appropriate day shapesand lights and will transmit an Automatic Identification System (AIS) message.

Program Schedule:The IWS Windwalker will mobilise at the Port of Lowestoft, with first commissioning activitiesanticipated to start around 18/03/202

The CTVs will mobilise at the Port of Lowestoft and support the IWS Windwalker throughout thecampaign.

WTG installation is expected to be completed end of Q4 2026.

*Servicing Operations

Servicing of the acoustic monitoring stations will take place from week commencing 30 March 2026, subject to weather conditions.

Operations will involve service vessels working at or near station positions for short durations during suitable weather windows.

Mariners are advised to exercise caution in the vicinity of these positions during active operations.

Some primary aims of the SubSea Soundscape project are;

To support a new Marine mammal evidence base for the Celtic Sea.

To create a region wide acoustic soundscape model and open-source baseline acoustic data of the Celtic Sea integrating new S3 data and other secured acoustic data sources.

To Co-develop road maps for the use of acoustic soundscape models for consenting.

Navigation Advice

Equipment is fully subsurface and presents no hazard to surface navigation.

Trawling, dredging, or seabed gear deployment in the vicinity of marked positions could be avoided to reduce risk of entanglement or equipment damage.

Total vertical height of unit: approx. 5 m above seabed.

Minimum clearance above highest point: 55 m in shallowest locations. 

Each acoustic monitoring system will comprise: 

• Acoustic release system

• Fish tag detection system (69 kHz)

• Broadband hydrophone and cetacean click-train logger

• Mooring frame with integrated components

On behalf of Inch Cape Offshore Ltd, N-Sea will continue seabed preparation activities within the wind farm site boundary and its export cable corridor. Boulder clearance will focus on the wind farm site and the export cable 2 route. 

Seabed preparation includes the relocation of any boulders which may affect the installation of offshore structures, inter-array cables and export cables.

The boulder relocation vessel, FS Aries will be joined by N-Sea Pathfinder on or around Wednesday the 19th of March.

The 17 construction boundary demarcation buoys will remain in location until the windfarm construction activities have been completed and handed over to the Operations and Maintenance teams.

Once the permanent Aids to Navigation (AtoN) have been installed on the WTGs, Trinity House will approve the permanent AtoN and the boundary buoys will be removed.

If anyone finds a buoy that is off station or encounters a buoy location where it is not functioning or is missing, they should report this to the Dogger Bank Duty Marine Coordinator as soon as possible.

On behalf of Inch Cape Offshore Ltd, Seaway 7 shall commence the installation of 54 WTG foundation transition piece components.

The transition pieces will be transported from the Port of Leith to the Inch Cape site and installed by the heavy lift vessel Seaway Alfa Lift.

Alfa Lift is expected to arrive at the Inch Cape site on or around the 17th of March to commence installation which will continue for several months, further details are in the attached notice to mariners.

Wind Osprey and Wind Pace will install 95 WTGs

Installed WTGs shall be marked with the following aids to navigation:

Lights

• Fl Y 2.5s light (visible through 360°)
•  Minimum 2 nm range

Partially constructed monopiles shall be marked with the following aids to navigation where a transition piece has not been installed:

Lights

• Fl Y 2.5s light (visible through 360°)
• Minimum 2 nm range

Weather permitting, offshore works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week).

During operations, the Wind Osprey and Wind Pace will have restricted manoeuvrability as defined under COLREGS (International Regulations for Preventing Collisions At Sea, 1972). They will display the appropriate day shapes and lights and will transmit an Automatic Identification System (AIS) message.

• The steel wire rope sections are assumed to be remnants of discarded trawl wire or anchor cable and are now partially exposed above seabed level.
• The wire does not pose a hazard to general navigation.
• However, it may present a risk to small vessels when anchoring or operating gear near the seabed.
• A substantial amount of wire remains buried beyond each of the location ends detailed below.

• The steel wire rope sections are assumed to be remnants of discarded trawl wire or anchor cable and are now partially exposed above seabed level.
• The wire does not pose a hazard to general navigation.
• However, it may present a risk to small vessels when anchoring or operating gear near the seabed.
• A substantial amount of wire remains buried beyond each of the location ends detailed below.

It is requested that mariners avoid activities which are likely to disturb the seabed within a 500m Radius of this location until the exposed export cable has been re-investigated. A further Notice to Mariners will be issued to confirm the course of action we will be taking to rectify this. Please note that the standard safety rules apply when fishing in or near wind farms and associated cables. All mariners are requested to make themselves aware of their obligations for conducting activities over buried and protected cables under International and UK Cable (Sub-sea) Protection Legislation. 

Mariners are reminded to navigate with caution and keep continued watch on VHF Ch. 12 / 16 when navigating the area. The Marine Coordination Centre will be responsible for monitoring and policing the Safety Zone and can be contacted directly for advice. Further information on the risks to fishing adjacent to subsea cables can be found in Weblinks: www.kis-orca.eu https://www.seafish.org/article/kingfisher-bulletin 

All mariners and stakeholders are advised that a Passive Acoustic Monitoring (PAM) mooring array for the purpose of monitoring marine mammals’ detections is currently deployed along the east coast of Scotland, within 2 km of the coast, between St Andrews Bay and Inverbervie.

The PAM array will remain in situ for 2 years (i.e. up to August 2027) with a service interval every 3 months. The moorings will not be surface marked as the top of the mooring extends approximately 4-7m above the seabed.

 During a servicing trip on Saturday 21st February, an item has been dropped to the sea during the recovery of the Passive Acoustic Monitoring mooring at Carnoustie, coordinates shown in the attached notice to mariners.

One PAM mooring was redeployed during the service trip on 21 February 2026, locations and coordinates for the passive acoustic monitors currently in place are shown in the attached notice to mariners.

See detailed map on our bulletin website

The works will commence around the 21st of February 2026 continuing until approximately Q2 2027.  The works will be continuous, 24 hours a day.  A chart of the DBB construction area boundary coordinates and a table of WTG location coordinates is provided below. A running list of the completed WTG installations and the next locations to be installed is presented in the Weekly Notice of Operations.

During operations, the Voltaire will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. 

During operations, a Statutory Safety zone of 500m radius will be in place around the Voltaire during the installation of WTGs

Seaway 7 deployed a Wave Rider Buoy on the 01/05/2025 within the boundary of the East Anglia THREE Offshore Windfarm Array during the Monopile Noise monitoring campaign as referenced in EA3 NTM 026 - 2025 Monopile Installation (Noise Monitoring Buoy Deployment). The Wave rider Buoy will remain on station until the end of the project.

The Wave Rider Buoy is equipped with a flashing yellow light and has a range of four nautical miles.

Recovery and/or periodic maintenance of the Wave Rider Buoy will be notified via future Notice to Mariners

Positions for both North & South weather buoys are identified in the attached Notice To Mariners 005 -2025. There will be periodic maintenance for both weather buoys during construction of EA3.

There is an exclusion zone of 100m around the weather buoys, mariners are  advised to abide by the 100m safety zone and navigate with caution at all times.

Norside Supporter Will be Bolting and Grouting 95 monopiles and transition pieces at the WTG locations set out in section 2.2 of this document. It is currently anticipated that weather permitting, offshore works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week)

OverviewMariners are advised that North Falls Offshore Wind Farm (NFOWF) will undertake a metocean survey within the Wind Turbine Array Area, at the Primary and Secondary locations shown in Table 1 and Figure 2.

Survey Duration Mobilisation will commence on or after 18 February 2026, with the metocean survey lasting between 12 and 18months. The planned survey end date will be no later than 16 August 2027.

Survey Tasks The metocean survey work is being undertaken by Partrac, who will use the vessel CT Vector to deploy the metocean equipment at the Primary and Secondary locations shown in Table 1 and Figure 2. It is expected that the deployment operation will last for one day.

The metocean equipment will consist of one seabed frame deployed at each location (i.e., a total of two seabed frames). Each seabed frame will be equipped with an acoustic Doppler current profiler (ADCP) and additional sensors (temperature sensor, water-level sensor, and turbidity sensor). Each seabed frame will be connected to a clump weight, with approximately 100 m leaded polypropylene ground line between the seabed frame and clump weight.

As a consequence of equipment being deployed, all mariners are advised to keep a safe clearance distance of no less than 500 m from the deployment vessel and metocean equipment deployment locations. No towed survey equipment will be deployed from the vessel.

CTV - HST Tynemouth supporting service operations over the summer months commencing 1st March 2026 

Vessels shall be monitoring channel VHF 16 and shall be displaying the relevant day shapes / night lights when restricted in its ability to manoeuvre.

Mariners are requested to refrain from entering and transiting through the construction area as demarcated by these demarcation buoys. 

The table below provides a summary of each Cardinal and Special Mark Buoy deployed at the SOWF array, including target coordinates in WGS84 Degrees Decimal Minutes and a description of top mark and lantern characteristics. The Demarcation Buoys will be deployed for a period of approximately three years.  

The table below provides a summary of the Met-ocean Buoys deployed at the SOWF Array.

The table below provides detail of Seabed Met-Ocean Buoy Moorings that remain in place at SOWF (Excluding Buoy).

The works will be performed in a single campaign, commencing on the 7th of December 2025 and continuing until approximately Q4 2026. The works will be continuous, 24 hours a day. The operations will include visual inspections and remedial maintenance at the Offshore Substation Platform (OSP) and at installed WTG foundation locations. During operations, the IWS Sun Walker will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message. It is requested that all vessels maintain a minimum of 500m separation distance from the SOV and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working area.