News

The dropped object occurred at NNG windfarm, and  was the middle section of the crew transfer vessel (CTV), Forth Engineer, fender located on the bow end of the CTV. Whilst the CTV was ‘pushing off’ the wind turbine generator H13, after technicians had vacated it, the fender became loose from the CTV dropping into the sea.  The plan surrounding the dropped object has yet to be finalised. Once finalised-this will be communicated without delay.  It is anticipated the object has sunk to the seabed based on accounts from the CTV operating crew. Risks and dangers to other sea users for navigation is estimated to be low due to the mass being 250 kilograms. 

PROJECT OVERVIEW Please be advised that Socotec Land & Hydrographic Surveys (on behalf of SHEPD) will be undertaking subsea inspections across the Shetland Isles 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.  

This is to inform mariners of planned maintenance activities within the Moray Offshore Windfarm (West) Limited (Moray West) Offshore Wind Farm. Works are planned to commence on or after 23 August 2026, with the exact start date dependent on weather and operational conditions. Once underway, the operation is expected to take approximately three days to complete.

The works comprise a transformer exchange which will be carried out at WTG EO8 (Table 1). The works will be carried out by the Jack-up vessel “Wind Peak” which will be required onsite for the duration of the works, with client reps in place throughout.

The development of the windfarm is made up of several elements - current ongoing elements include:

Construction Support Activities

The Offshore Construction Support Vessels Norwind Helm, Grampian Tyne, Grampian Tay, Windea Carnot,  and Grampian Derwent will continue with ongoing construction support activities within Dogger Bank A construction site.

Construction Support Activities

The Offshore Construction Support Vessels IWS Skywalker and Grampian Tees, will continue with ongoing construction support activities within Dogger Bank B construction site.

Wind Turbine Generator (WTG) Installation

he Jack-up WTG Installation Vessel, Voltaire, will continue installation of wind  turbine generators (WTG) within the Dogger Bank B construction area. The works commencing in February 2026, and will be continuous, 24 hours a day, for the duration of the WTG installations

During operations,all vessels will be restricted in their 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 vessels will also transmit an Automatic Identification System (AIS) message.

Construction Support Activities

Inter-Array Cable Installation OperationsThe Service Operations Vessel (SOV) Wind Evolution will continue  inter-array cable installation operations, starting with foundation preparations. The Cable Lay Vessel (CLV) Viking Neptun will continue cable lay operations.

This work will be undertaken by a Jack-Up Barge (JUB) and will remain stationary at each location for up to 48 hours. A Multicat will only be present on site to assist the JUB maneourves as required.

A CTV will transit from Whitehills daily.

Please see the attached Notice to Mariners for full details.

Scottish Hydro Electric Power Distribution (SHEPD)

PH003762 Skye-Uist Replacement

Notice to Mariners

Please be advised that Jan De Nul Luxembourg S.A. shall be undertaking power cable installation and power cable protection activities for the Skye-Uist Replacement project. Subject to the granting of the necessary licences, the project will install 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 Isle of Skye and Loch Pooltiel on Isle of Skye.

This notice supersedes the earlier Notice to Mariners dated 03/07/2026 and includes an updated FLO contact.

The works will be carried out by several vessels which are listed further in this NtM.

Survey Activities: XOCEAN is planning the collection of geophysical data along a proposed cable route corridor in Orkney, from the islands of Sanday to North Ronaldsay. The vessel, DEEP Atlas, is expected to operate out of Kirkwall for mobilisation and the North Ronaldsay area for survey activity. The vessel will pull towed sensors (SideScan Sonar & Magnetometer) through the water in proximity of the seabed.  Dates/Duration: Operations commenced on 14 July 2026. It is expected that the survey activities shall be completed by 25th July 2026 (subject to weather). Survey Area: Figure 1 below indicates the operational area in red. This is outlined in Table 1 below also.  

Scope of works: 

As part of the Reef Enhancement for Scour Protection (RESP) project, ARC marine will be conducting post installation surveys at 7 turbine locations within the windfarm. Subject to weather windows, operations are expected to start on the 20th of July 2026, completing after 13 successful days at sea, no later than the 22nd of August 2026. Baited Remote Underwater Video (BRUV): A total of 36 BRUV samples shall be collected at all 7 turbine locations (Figure 1) within Rampion OWF, see Appendix A for coordinates.  

Remotely Operated Vehicle (ROV) / Drop Down Camera (DDC) 

A total of 320 still images of the seafloor shall be captured during 1-2 transect surveys at each of the 7 sampling turbines (Figure 1), all within Rampion OWF, to a maximum radius of 120m from each turbine. See Appendix A for coordinates. Equipment shall remain tethered to the vessel and will extend no further than 100m radius from the vessel at any time. Equipment is sensitive to any in water obstacles/ entanglement risks. Sediment Grab sampling 

A total of 48 sediment grabs shall be collected at the 7 sampling locations (Figure 1) within Rampion OWF. See Appendix A for coordinates. 

Water Sampling

A total of 15 water samples shall be collected from circa. 3m from the seafloor at the 7 turbine locations (Figure 1) within Rampion OWF. Equipment will be tethered to the vessel and will extend no further than 5m radius from the vessel at any time. See Appendix A for coordinates.  

Fishing gear It is kindly requested that any fishing gear is removed from the sampling locations to ensure efficient sampling and minimise impact to operations of all stakeholders in the area. Once works are completed, a follow-up NTM shall be issued to restart normal operations.  

Safe distance  It is kindly requested that all non-survey operations maintain a safe distance of at least 300 meters from all survey turbine locations until the survey concludes (Appendix A), as communicated through proper channels. This is to ensure that all assets and marine users are safe and able to complete the necessary works. 

All mariners and stakeholders are advised that the P35 monopile temporary navigation light is unlit.

All other monopiles and transition piece navigation lights are operational.

The locations & coordinates of P35 monopile is shown in the attached notice to mariners

EGL 3 survey equipment will consist of MBES, SSS, USBL, Mag, ROTV and UXO surrogate testing which will be placed on the seabed a maximum of three times in the nearshore area for equipment verification tests.

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.

The EGL 3 UXO marine survey works are being carried out by GeoXYZ Limited.

General Safety Advice  The vessel will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea. Other vessels are requested to provide a minimum clearance of 500m from the survey vessel during marine operations and pass at a safe speed. Regular Security Messages will be issued on VHF Channel 16 and this Channel will be always monitored by the vessel. The vessel will also transmit regular Automatic Transmission Identification System (AIS) Messages.

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, we request that you plan your activities around our short-term, temporary activities. Any failure to remove equipment or entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in removal of the relevant equipment.

Overview

The survey will focus upon the southern half of the wind farm area, with an additional survey in the north too.  Because towed equipment will be deployed, please note that BBWFL are engaging with static gear fishers where fishing gear has potential to obstruct the survey.  

Within the Notice to Mariners PDF Attachement, Figure 1 displays the Mariner Cautionary Area for all marine traffic, with respective co-ordinates listed in Table 1.  

Figure 2 displays the locations where fishing gear is to be removed from; any fishers observed to be fishing within this area have been contacted with respect to gear removal where necessary.  A guard vessel will be present to work alongside the survey vessel.  An offshore fisheries liaison officer (OFLO) will be on the survey vessel.  

The survey work is being undertaken by TGS and will be conducted by the Ramform Vanguard vessel.  Vessels will arrive on site from 24th July 2026 at the earliest. The scouting/guard vessel will be the GV Reaper WK83 to start, with the exact schedule to be confirmed through further notices as required.   

Survey Duration  

The survey is anticipated to take approximately 2 weeks. To account for all eventualities including weather delays, we would like to extend the duration of notice validity to 31 August 2026.  

For further information, please refer to the full Notice to Mariners document contained within the PDF Attachment.  

Survey Activities: XOCEAN is planning the collection of geophysical data using remotely piloted Uncrewed Surface Vessels (USVs) along the cable route between Ardmore-Skye and Flodabay-Harris. The USVs are expected to operate out of Tarbert 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 Tarbert and assist in towing them back in if a technical issue occurs. 

Dates/Duration: Operations commence in 8th July 2026. It is expected that the survey activities shall run for approximately 30 days, subject to weather. 

Survey Area: Figure 1 below indicates the operational area including a 500m buffer from the survey corridor. Coordinates delineating the area are in Table 1 below also. If mariners believe our operations will interact with their activities then they should get in touch via the FIR/ FLO. 

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, we request that you plan your activities around our short-term, temporary activities. 

Any failure to remove equipment where this has been requested, or entry into the identified location in a manner that would constitute a hazard may be a breach of your duties of safe seamanship as described in the Convention on International Regulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995, and may result in removal of the relevant equipment. Failure to remove equipment, where this has been requested, or entry into the identified location in a manner that would constitute a hazard may constitute a breach of duty of care at common law, and a failure to protect submarine cables for successful seabed user co-existence under Scotland's National Marine Plan. 

SHEPD shall found on this notice in the event of any damage, loss or disruption arising from failure to heed the information herein. 

Reach Subsea UK LTD are conducting an offshore survey campaign, and X-Oceans are conducting a nearshore 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. The nearshore geophysical survey vessels (USVs) will be operating within 15m LAT and out to >30m LAT, working as close to shore as possible. The survey equipment will also require calibration testing, which may be conducted outwith the survey corridor.

Mariners are advised that Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) has completed the replacement of the Orange-D inter-array cable (IAC). The burial of the Orange-D IAC is due to take place in August 2026.  The replacement of one IAC (Orange-D) took place in May 2026 via the Viking Neptun (call sign: LAYH7). The Viking Neptun mobilised in Hartlepool on the 6th of May and commenced cable replacement works onsite from the 10th of May. The installation of the replacement cable was completed on the 19th of May and the Viking Neptun (call sign: LAYH7) has demobilised from the site. Due to vessel availability, following the replacement of the Orange-D cable it is expected that cable burial will take place in August 2026. While the IAC cable is unburied a guard vessel is present onsite 24/7 with an OFLO onboard to alert mariners of the seabed hazard. Further guard vessel details can be found in the general safety advice section below.  Testing and termination (T&T) works on the Orange-D IAC are complete. All works are now complete and the OEG Endurance (call sign: MIDM7) has left the site.  Area of Operations Mariners are advised that all vessels in this campaign will be working within the boundaries of the Neart na Gaoithe Offshore Wind Farm, shown in Figure 1 within the coordinates shown in Table 1. All vessels are requested to remain at least 500 meters away from all the work vessels and static fishing gear is requested to be removed from the exclusion area shown in Figure 1 and Table 1. Vessels over 15m are requested to have AIS turned on and detectable when in the vicinity of construction works. Vessels are requested to contact the Guard Vessel (details provided below) prior to entering the site to confirm current safety zones in place, and to ensure that the NnG Control Room can be made aware of your presence on site.

The survey aims to confirm risk of Unexploded Ordnance (UXO) is As Low As Reasonably Practicable (ALARP). As this survey relates to the potential location of wind turbines, no survey operations will occur within the Structure Exclusion Zone (SEZ) in the south east of the site (please see map in attached NtM).

Please note, a geotechnical survey will be ongoing within the Array Area for the duration of this geophysical survey. This scope is also being undertaken by Fugro, and there is a seperate notice on Kingfisher containing further details.

Please see the attached Notice to Mariners for full details

The marine survey activities for Western Link 2 will commence on the 13/07/2026 and includes geotechnical survey work in the survey corridor, from the Firth of Clyde at the northern end, through the North Channel, into the Irish Sea, and landing at Caernarfon Bay at the southern end. The offshore work will be undertaken by survey vessel Geo Ocean VI and the nearshore work will be undertaken by the jack-up barge Causeway Giant 1. The work will consist of a geotechnical survey to collect high-quality geotechnical data through seabed cone penetration and vibrocoring, and nearshore ground investigation work at borehole locations. 

There will be two landfalls in Ayrshire, Scotland, and one landfall in Caernarfon Bay, Wales. 

On behalf of Inch Cape, N-Sea will commence inter array cable installation activities. Cabling will be laid and pulled into the offshore sub station platform and foundation structures as shown in the attached Nptice to Mariners.

The service operations vessel Olympic Taurus will transfer cable preparation and pull in teams to the offshore platform and foundation structures utilising it’s walk to work system, Olympic Taurus is expected to arrive at the work site on or around the 17th of July.

Inter array cables will be surface laid and pulled into the sub station and foundations from the cable lay vessel Altera which is expected to arrive at Inch Cape on or around the 31st of July.

Operations shall be supported by the crew transfer vessel MCS Pampero.

Cable installation operations are expected to continue for several months.

Marine Cable Route Survey Operations 

Mariners are advised that a marine cable operational survey is planned for the Shetland HVDC Link 1 cable. SSEN Transmission has a requirement to complete surveys of operational assets periodically and the marine survey activities for the Shetland HVDC Link 1 are scheduled to commence on the 26th of June 2026.  

The survey works will be carried out by XOCEAN on behalf of SSEN Transmission and are expected to take approximately 5 days to complete, subject to weather conditions. 

The survey vessels will consist of 2 x USVs utilising hull-mounted MBES, and towed SSS. A small vessel to support operations will be utilised at infrequent intervals. There is no requirement for fishing gear to be cleared from the area during the operations.  

Survey Vessels 

The survey works are being carried out by using the following vessels: USV – (XOCEAN) X06 MBES & X28 SSS 

USV - XOCEAN X06, MMSI 232025477

USV - XOCEAN X28, MMSI 232

Support Vessel

Northerly Voyager, Call Sign J8QP1, MMSI 377907296 

General Safety Advice 

The vessel will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea. Other vessels are requested to provide a minimum clearance of 500m from the survey vessel during marine operations and pass at a safe speed. Regular Security Messages will be issued on VHF Channel 16 and this Channel will be always monitored by the vessel. The vessel will also transmit regular Automatic Transmission Identification System (AIS) Messages. 

The Offshore Service Vessel Norside Cygnus, will carry out the works and will be on station for approximately 1-2 hours. During the operation, the Norside Cygnus will be restricted in her ability to manoeuvre and it is requested that vessels maintain a minimum 500m safety separation.

OEG has returned to the EA2 Windfarm Development Consent Order Limits with the Northern Victoria vessel and is carrying out the the following scopes:-

Explosive Ordnance Disposals (EOD)

There is a total of 3 confirmed UXO's remaining that are being disposed of using Low Order Deflagration techniques during June, July & August. No High Order disposals will be carried out. Security broadcasts are being made at requisite times ahead of disposal activities to all vessels in the area to keep clear of the UXO Disposal site.

Noise monitoring/hydrophone placements have now ceased and all noise monitoring devices have now been recovered and removed from site.  

Boulder Relocations

A total of approx 1800 boulders are being relocated during June, July and August. This is being carried out using an SMT. 

Out of Service Cable Removals

12-15 OoSCs are expected to be removed during August and September by use of WROV and SMT. 

Annual VTS Maintenance on 3 x WTG locations

Prysmian are conducting Offshore ROV Surveys on behalf of the Eastern Green Link 2 subsea electricity transmission cable project. Please find vessel details and contact information in the attached notice, as well as contact details for the fisheries liaison team. 

Prysmian on behalf of the Eastern Green Link 2 subsea cable project will be conducting a ROV survey. Survey activities are due to commence on the 7th May 2026, and the surveys are expected to be completed on the 27th July 2026, subject to weather. 

Please be advised that Galloper Windfarm will be carrying out Paint repair campaign. The campaign will be using the Seacat Liberty across both North and South Galloper Fields.

 The vessel will be operating during the daytime only, 16 working days commencing 23rd of July 2026 – weather dependant.  

An Exclusion zone of 250 metres will be required whilst the work scope is underway.

Green Volt Offshore Windfarm Ltd will be carrying out a series of environmental and Geophysical survey within the nearshore area of the Green Volt export cable corridor, in the vicinity of the landfall location at St Fergus South beach.

These surveys are being undertaken to gather data and gain a better understanding of seabed conditions, which will play a key role in informing the detailed design. The surveys will be carried out by Spectrum 1 and Spectrum Nyquist. Mobilisation is planned for 20th July 2026 and is expected to be on location for approximately seven weeks, weather permitting. The surveys are subject to weather conditions; therefore dates may be subject to change. 

A minimum exclusion distance of 500 metres should be maintained around the survey vessels whilst survey operations are underway due to towed equipment.

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake a Radiator Replacement programme on all 3 Offshore Sub station Platforms (OSPs) using the Jack Up Vessel HEA Hydra, starting approximately 23.07.2026 for 21 days weather dependant.

Those locations are presented in the table below. 

All vessels are advised to navigate with caution and keep clear of the provided positions by a 300m radius. 

Campaign 3 post-lay burial works will commence from KP200-EEZ from 11th June 2026 to 16th July 2026. Post-work surveys will also be extended to the EEZ. The table below summarises the activities being carried out from KP2-EEZ. It should be noted that these dates are subject to change due to weather or operational requirements. 

* Location and timing dependent on results of cable installation burial depth survey.

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).

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 Vessels (CTVs) Seazip 9 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.

A drone shall be launched / recovered from the main deck of the MJM Enterprise throughout this period and shall be within 500m of the asset that is being inspected. 

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 Vessels (CTVs) MHO Gurli and Seazip 9 continues operations at the Sofia OWF.

All vessels can be contacted on VHF 16 throughout as required.

Cable laying operations will continue to be conducted within the East Anglia THREE Offshore Windfarm byCLV Seaway Aimery. The vessels will install subsea cables between WTGs and the Offshore ConverterStation (OFCS). The Grand Canyon III will conduct trenching and burial operations supporting the Cable-Laying operation. During cable deployment, trenching & burial both the vessels will be restricted in theirability to manoeuvre.The Seaway Aimery will carry out cable laying activities, and be supported by the Seaway Moxie & WindeaClausius, which will both undertake equipment and personnel transfers to WTGs and the OFCS via aWalk‑to‑Work (W2W) gangway system. While conducting these transfers, the Seaway Moxie & WindeaClausius will also be restricted in manoeuvrability.The Rix Lion will be the CTV support vessel working alongside the Windea Clausius providing 24hr supportcovering both cable installation and T&T works.

Research Buoy Demobilisation Confirmation - Morlais Demonstration Zone. 
Following a period of research and development the project wish to notify you of the demobilisation of the Marinus buoy to Holyhead Port. 
*Please note the mooring is still in situ, and will be removed at a later date*

Introduction:

Mariners are advised that a marine cable route survey is planned for the proposed Western Isles cable. The survey will involve geophysical and environmental surveying. SSEN Transmission will conduct marine surveys to gain information on seabed morphology, installation design, sediment structure and to gain benthic characterisation and habitat mapping. All the collected data provides the project with the best understanding on the marine environment to inform a Marine Environmental Assessment to be completed prior to cable installation. 

Marine Survey works will be carried out by Spectrum Geosurvey Limited and are planned to commence on the 6th of July and are expected to last for a duration of up to 2 weeks, depending on weather and operational progress.

Equipment that will be used as part of the works are: 

·         Multibeam Echosounder (vessel-mounted)

• Sub Bottom Profiler (vessel-mounted)
• Side Scan Sonar (towed)
• Magnetometer (towed)
• Submersible Camera (towed)
• Grab Sampler (towed)

The area of work, pertaining to this Notice to Mariners (NtM) for Stornoway is highlighted in Figure 1 with the survey coordinates in Table 1. Survey vessels details and contact information are provided in Table 2 and 3 and further contact details for the project is detailed in Table 4.

Navigational Safety Advice:

Vessels are requiested to pass at a safe speed and distance and fishing vessels are advised to remain a safe distance, approximately 500m (0.3 nautical miles) from the areas identified. During these works the vessel will have restricted manouverability 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.

Survey Area:

The marine survey operations will take place within the following coordinates and can be seen in the attached chart "Marine_SHET_LT14_AdditionalSurveyArea_003_120526 - SSEN chart.pdf":

Table 1 - Site Limits

Survey Vessel:

The non-intrusive marine geophysical survey works are being carried out by Spectrum Geosurvey Limited using the Spectrum 1.

Contact details for the vessel can be found in Table 2 below.

Table 2 - Survey vessel details

Contact Details:

Contact details for the vessel can be found in Table 3 below:

Table 3. Vessel contact information

Fisheries enquiries should be addressed to the Fisheries Liaison team at Blackhall & Powis:

Table 4. Fishery Liaison Officer (FLO) contact information

Legal Notice:

During the period of this notice, we request that you plan your activities around these short-term activities. Any failure to remove equipment or entry into the identified location in a manner that would constitute a hazard would be a breach of your duties of safe seamanship as described in the Convention on International Refulations for Preventing Collisions at Sea 1972 and/or the Merchant Shipping Act 1995 and may result in Scottish and Southern Electricity Networks Transmission PLC taking further steps.

As part of the Orkney HVAC Project Leask Marine on behalf of Scottish & Southern Electricty Networks Transmission (SSENT) will be undertaking the following marine operations; Commercial Diving, dredging and subsea lifting operations. The vessel MV C-Force will be deployed on a four-point mooring spread coordinates of which are detailed in the the attached NTM.

Vessels are requested to maintain a safe distance of 400 meters from the stated coordinates submitted.

Vessels involved will be keeping continuous listening watch on Channel 16 and 6 and will display appropriate lights and marks as required by the International Regulations for Preventing Collisions at Sea.

Mariners are requested to give the works a wide berth.

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. A servicing trip was completed on the 23 June to redeploy the moorings as shown in Table 1 and Figure 1 below.

A separate mooring assembly remains in place at St Andrews Bay with a temporary surface marker buoy. This was deemed as a dropped object in previous NTM, as the marker buoy could no longer be located. This has been now confirmed to remain in place, to be recovered in the following days.

The survey equipment will consist of: Multibeam echosounder, side-scan sonar, USBL (ultra-short baseline acoustic positioning system), magnetometer array, and eBOSS (KP45-55 only).

Scottish Power Transmission (SPT) and National Grid Electricity Transmission (NGET) are working together to address the need for increased capacity within the transmission network between Scotland and England. EGL4 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 Fife and Lincolnshire.

The EGL 4 UXO marine survey works are being carried out by Gardline Ltd.

The marine survey will be undertaken by GeoXYZ who are due to commence marine surveys on 24th May 2026. 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.

Activity:

In partnership with Atlantis Geoservices Ltd. XOCEAN is chartering the Glomar Vantage to conduct geotechnical seabed investigations along the UK section of the proposed Woodstock Cable Limited cable route corridor between Hunmanby Gap, UK and Henne Strand, Denmark. 

The geotechnical works will deploy equipment to test and sample the seabed at intervals across the UK sector of the route corridor. The vessel will be operational 24hrs a day.

Dates & Duration:

Survey operations are expected to commence from 8th July 2026 for approximately 2 weeks, subject to weather and other operational factors.

Location:

The provided coordinates indicate the survey routing along which the investigations will be conducted Operations will extend approximately +/-250m from this centreline. Note that all selected investigation locations are a minimum of 500m from seabed infrastructure and outside of related exclusion zones. 

In addition to the survey area, the vessel will transit from/to the ports of Great Yarmouth, Hull & Hartlepool as required for mobilisation/demobilisation and weather shelter.

Vessel:

The workscope will be conducted form the Glomar Vantage. Further details are provided in below.

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

NEXANS on behalf of SSEN will be undertaking marine activities as part of the Orkney HVAC Project between Warbeth, Orkney and Dounreay, Caithness.

Works will include Operations of Remotely Operated Vehicle (ROV) along the the corridor performing seabed data collection and mattress installation at two locations . 

Works  will take place during July 2026  from the vessel MV Viking Reach. The vessel will be operating with in a 200m wide corridor as per the coordinates below.

The vessel has limited maneuverability during operations. 

 The crew will be listening to channel 16.

Full details can be found in the attached NTM.

See detailed map on our bulletin website

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

xthere is a 500m exclusion zone around the vessel at all times

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

Servicing Operations

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, Enshore Subsea Ltd, shall continue export cable 2 installation operations. 

Export cable 2 sections 1,2 & 3 have been surface laid, coordinates shown below in the attached Notice to Mariners.

CMOS Installer has laid one rock bag at a cable crossing location and seven rock bags on the section 1 cable in the vicinity of the cable landfall at Cockenzie, East Lothian. The cable crossing rock bag has no surface mark, The rock bags at the landfall area are surface marked by red coloured A4 buoys, location and coordinates shownin the attached Notice to Mariners.

The CMOS Installer will return to the work site to commence cable burial on or around the 3rd of July. Burial operations will start in section 2 moving towards the offshore sub station platform, in the attached Notice to Mariners. Burial operations will continue until September. 

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

Further to the most recent NtM KOWL-MEM-0001-100rev1 previously issued on 18/06/2026, this second updated revision reflects most recent expected start date due to a delay in arrival of the Obana JUV at the Kincardine wind farm.

Please be advised that there will be a programme of maintenance work (estimated 4 weeks duration, 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:

• Main component exchange on four assets

The work is expected to start around 30 June 2026.

Petrodec Obana Jack Up Vessel (JUV) shall be on site, along with support tugs, which will be listening on channel 16 at all times. The JUV will locate close to each affected asset and use its main crane to carry out the exchanges.

The below temporary changes to the aids to navigation should be noted, only for the period of the works:

• KIN01, KIN02, KIN04 and KIN05 fog signals will be disabled (KIN03 will remain active).
• The KIN01, KIN02, KIN04 and KIN05 navigation lights will be shielded in turn, only for the period the JUV is located in close proximity, in order to avoid confusion between the individual platform and the JUV navigation lights (i.e. only one platform navigation lights will be shielded at any time).

An exclusion zone of 500m shall apply around the Obana and vessels are requested to avoid the wind farm area.

Call sign: J8B6076IMO: 8764119MMSI: 377405000

The survey will employ the use of a DDC system for visual seabed assessments, 0.1m2 Dual Van Veen and Hamon grabs to obtain sediment samples of the seabed, as well as Niskin water sampling devices. The works will be completed by personnel from OEL on the vessel Roman Rebel. The survey operations do not involve towed survey equipment however at some locations the DDC will be slowly manoeuvred along transect lines at ~0.5 knots. During deployment of equipment the vessel will be under restricted manoeuvrability and require sufficient clearance for safe working. During periods of poor weather, the vessel may return to port or alternative safe haven for shelter.

OEL will have a project FLO onboard the Roman Rebel during all survey operations. For any specific enquiries required for the FLO please contact as per the attached notice.

These HDD operations will involve installing break-out (punch-out) ducts within Sandford Bay. There will be dive works conducted in support of this effort. There will be a dive support vessel and crew transfer vessel supporting these works. Work vessels will be restricted in their maneuoverability at times. There will be divers in the water at times. The work vessels will display appropriate shapes and lights prescribed by the International Regulations for Preventing Collisions at SeaFor these reasons. Crew transfer will occur nominally between the hours of 0700 and 1900 hours. All vessels transiting the area are requested to provide a minimum clearance of 500m from the vessel C-Horizon during marine operations and pass at a safe speed. VHF Channel 16 will be monitored at all times and Security Messages will be issued on this channel. These vessels will also be transmitting on the Automatic Transmission Identification System (AIS).

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.  

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

The vessel will shall be conducting geophysical survey operations 24 hours per day and operating from the Port of Den Helder.

The vessel shall be monitoring VHF 16.

Vessel details included within the appended Notice to Mariners. 

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. 

See detailed map on our bulletin website

The jack-up vessel ‘JB 120’ will be positioned next to the East Anglia THREE OFCS within the East Anglia THREE Offshore Windfarm area.

• Rig move: The vessel will be maneuvered to its designated location.
• Jacking-Up Procedure: The vessel will be temporarily soft jacked on a safe stand-off position, from where its four anchors and mooring lines will be deployed. The deployed mooring lines will be used to move the vessel safely towards the final position, where the vessel will be jacked.
• Operational Phase: Once jacked up, the vessel will remain stationary for an estimated six months.

During operations, the ‘JB 120’, ‘CENTAURUS’ (Lead tug), ‘FAIRPLAY 62’ (Assistant tug) and ‘FAIRPLAY 32’ (Assistant tug) will be restricted in their 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 vessels will also transmit an Automatic Identification System (AIS) message.

A Statutory Safety zone of 500m radius will be in place around the ‘JB 120’ at all times.

‘JB 120’ and supporting tugs are supplied with VHF multi-channel radios and mobile phones.

The survey equipment will consist of MBES, SSS, USBL, Mag, ROTV and UXO surrogate which will be placed on the seabed a maximum of three times in the nearshore area for equipment verification tests.  

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. EGL3 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 3 UXO marine survey works are being carried out by GeoXYZ Limited.

The survey equipment will consist of MBES, SSS, USBL, Mag, ROTV and UXO surrogate testing which will be placed on the seabed a maximum of three times in the nearshore area for equipment verification tests.

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. EGL3 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 3 UXO marine survey works are being carried out by GeoXYZ Limited.

The area of work, pertaining to this Notice to Mariners (NtM) for EGL 3, is highlighted in Figure 1, with the survey vessels contact details for the project found in Tables 1 & 2. Contact details for the project Fisheries Liaison Officers are detailed in the attachment.

See detailed map on our bulletin website

The survey will employ the use of various fishing methods (fish traps, jigging, creels, and potential sole nets and otter trawling), a 0.1m2 Day grab to obtain sediment samples of the seabed, as well as Niskin water sampling devices and plankton netting. The works will be completed by personnel from OEL on the vessel Solstice BF56. During deployment of equipment the vessel will be under restricted manoeuvrability and require sufficient clearance for safe working. During periods of poor weather, the vessel may return to port or alternative safe haven for shelter.

Mariners 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.

The metocean equipment was deployed on 17 April 2026, with the metocean survey lasting between 12 and 18 months. The planned survey end date will be no later than 16 August 2027. 

The metocean survey work is being undertaken by Partrac, who will use the vessel Green Isle to recover, service and re-deploy the metocean equipment at the Primary and Secondary locations shown in Table 1 and Figure 2.  It is expected that the recovery, servicing and re-deployment operations will last for approximately three days, commencing on or after 22 June 2026.  

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

All works will be carried out continuously, 24 hours a day. Charts of the DBC array area are provided in the attached document. Works are scheduled to commence on or around 21 June 2026, starting with foundation preparations by the Wind Evolution. The Viking Neptun is then scheduled to enter the field around 29 June 2026 to start cable lay operations.

The cable lay vessel will deploy the inter array cable onto the seabed through her dedicated deck spread. The cable will remain exposed on the seabed till trenching is performed.

During operations, the VIKING NEPTUN and WIND EVOLUTION will be restricted in their 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. 

On behalf of Inch Cape, N-Sea will conduct an inter array cable route pre lay grapnel run (PLGR), this process ensures the inter array cable routes are free of any debris prior to cable installation. A pre lay survey will also be conducted. Inter array cable routes are shown in the attached Notice to Mariners

The PLGR vessel, C-Trojan is expected to arrive at the wind farm site on or around the 24th of June, the pre lay survey vessel, Geo Focus is expected to arrive on or around the 1st of July, vessel details in the attached Notice to Mariners

Name:                               MeyGen South

Mark:                                South Cardinal

Type:                                 Virtual AIS Aid to Navigation (Type 3)

AIS Message:                    Message 21 (AtoN Position Report)

MMSI:                               992356283

Position (WGS84):           58°39.433’N 003°08.217’W (DMM)

The V-AIS AtoN is transmitted from a shore-based AIS Coast Station located at the MeyGen Substation, Ness of Quoys and does not correspond to a physical structure or lighted mark at the stated position.

Mariners should note that:

-          The AtoN is virtual only and is displayed on AIS-enabled systems.

-          No physical buoy, beacon, or light exists at this position.

-          The signal is intended to indicate the location of infrastructure / caution area associated with the MeyGen tidal development and Stroma Skerries to the North.

Charts affected:

-          All relevant navigational charts and ECDIS systems in the Pentland Firth.

-          Publications affected: Admiralty List of Radio Signals (ALRS).

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.

Activity Description:

Rock Bag installation will be performed along the Inter Array Cable strings, within the East Anglia THREE Offshore Windfarm area set out in section

Program Schedule:The Ocean Marlin is expected to mobilise from the port of Lowestoft circa 27th June 2026 with an estimated completion date of 30th July 2026, weather permitting.

Completion of the works will be notified through the cancellation of this Notice to Mariners. Weekly updates on vessel movements will be issued via the EA3 Weekly Notice of Operations.

Ocean Marlin will monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operations. 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

Ievoli Relume will perform sand wave levelling operations at locations E10, E11, and E21. The scope covers levelling of specific areas in preparation for subsequent jack‑up operations. These locations are further detailed in Section 2.2. of the  EA3 NTM 022-2026 - Wind Turbine Generator Installation Campaign- Sand Wave Levelling

Weather permitting, offshore works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week). During operations, the Ievoli Relume 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 Ievoli Relume will mobilise from the port of Great Yarmouth, with first activity expected on 22/06/2026.Weekly updates of WTG Levelling Campaign will be notified via EA3 weekly notice of operations. WTG Levelling Campaign is expected to be completed on 08/07/2026, completion of operations will be notified via closure of this notice to mariners.

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 six 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

The following vessels are operational 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.

This Notice to Mariners (NtM) is related to the upcoming Post Lay Cable Burial and Protection Works for the Interconnector under Marine Licence L/2022/00013/4. Please distribute accordingly so other sea users are aware.    Post-lay burial protection operations are still ongoing. Cable protection activities through mattress installation and remedial burial will continue to take place using the C-installer and Genesis until July 30th. These dates are subject to change due to weather or operational requirements.  

It is requested that all vessels maintain a minimum of 1500m separation distance from Yellowstone and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor.

Yellowstone is expected to mobilise from the port of Stavanger on the 15/06/2026.Completion of the works will be notified through the cancellation of this Notice to Mariners. Weekly updates on vessel movements will be issued via the EA3 Weekly Notice of Operations.During SRI operations, the Yellowstone 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.All vessels are required to monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operation.

UPDATE – Due to changes in vessel availability, the Fugro Zephyr will now remain on site until 19 June 2026. The Fugro Quest will arrive on 03 June 2026 at the earliest and continue operations until the survey scope is complete, alongside the Fugro Zenith. 

The guard vessels on site will now be the Ocean Trust and Reaper, which are planned to alternate for the remainder of the survey campaign. 

Please refer to the updated vessel information within the attached Notice To Mariners for further details. There are no changes to the survey scope.

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. 

RWE Renewables UK Wind Ltd at Rampion Windfarm would like to inform mariners that we are carrying out essential blade repairs on a number of locations across site. 

This work is due to commence on 5th June 2026 running until 2nd September 2026, within the Rampion OWF Area, depending on weather conditions.  

Technicians will be carrying out repair works via external rope access which pose a material risk of snagging on passing vessels if sufficient distance to the turbines is not adhered to. 

For the safety of the working party and anyone in the vicinity of the works, mariners are requested to be vigilant when approaching any WTG and steer well clear (>100m preferable) of any location where work is being carried out. 

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 

Crew Transfer Vessel Purus Franceswill provide assistance during the construction phase of the East AngliaTHREE Offshore Windfarm Array and will make regular transits between East Anglia THREE CDM and theports of Lowestoft and Great Yarmouth.

Purus Frances is expected to mobilise from the port of Lowestoft circa 20/05/2025.

Completion of the works will be notified through the cancellation of this Notice to Mariners. Weeklyupdates on vessel movements will be issued via the EA3 Weekly Notice of Operations

Crew Transfer Vessel NR Predator will provide assistance during the construction phase of the East Anglia THREE Offshore Windfarm Array and will make regular transits between East Anglia THREE CDM and the ports of Lowestoft and Great Yarmouth. 

Outer Thames Estuary Special Protection Area (SPA): 

As required under Deemed Marine License Condition 13(1)(c)(v) to minimise disturbance to red throated diver in the Outer Thames Estuary Special Protection Area (SPA) during construction of East Anglia THREE, these areas shall as far as practicable be avoided during transits from 01st November to 31st March. 

Crew Transfer Vessel NR Hunter will provide assistance during the construction phase of the East Anglia THREE Offshore Windfarm Array and will make regular transits between East Anglia THREE CDM and the ports of Lowestoft and Great Yarmouth. Outer Thames Estuary Special Protection Area (SPA): As required under Deemed Marine License Condition 13(1)(c)(v) to minimise disturbance to red throated diver in the Outer Thames Estuary Special Protection Area (SPA) during construction of East Anglia THREE, these areas shall as far as practicable be avoided during transits from 01st November to 31st March.

It is currently anticipated that weather permitting, operations will be carried out on a continuous basis (i.e. 24-hour working, seven days a week) ‘NR Hunter’ will remain on the project until construction is complete

Crew Transfer Vessel NR Rebellion will provide assistance during the construction phase of the East Anglia Three Offshore Windfarm Array and will make regular transits between East Anglia Three CDM and the ports of Lowestoft and Great Yarmouth. Outer Thames Estuary Special Protection Area (SPA) As required under Deemed Marine License Condition 13(1)(c)(v) to minimise disturbance to red throated diver in the Outer Thames Estuary Special Protection Area (SPA), during construction of EA3. It is anticipated that vessels which are transiting to Lowestoft and Great Yarmouth ports, such as for crew transfer operations, will transit through and/or in proximity to the Outer Thames Estuary SPA. These areas shall be as far as practicable be avoided during transit from 01st November to 31st March

A survey has identified potential cable exposures at several locations beyond the commonplace exposures (within the 50m radius around wind turbine and offshore substation foundations). The position and extent of the cable exposures shown in the below chart is limited to the burial status observed at the time of the survey.  Cable burial status evolves over time, often rapidly. Mariners should not assume otherwise.  Cable burial status is monitored periodically, and further information will be provided following future survey campaigns. Ørsted advises mariners to maintain care when operating within the windfarm array area.

The platform supply vessel ‘BOS PRELUDE’ provides supply service during the commissioning phase of the East Anglia THREE Offshore Converter station (OFCS) ‘EA3 OFCS’.

‘BOS PRELUDE’ will deliver supplies to the ‘EA3 OFCS’ and the jack-up vessel ‘JB 120’ (as long as installed next to the OFCS) as well as carry out regular voyages between East Anglia THREE Windfarm and the ports of Emden (Germany, main service port) and Lowestoft (UK) and is equipped with VHF multi-channel radios and mobile phones.

Outer Thames Estuary Special Protection Area (SPA):

As required under Deemed Marine License Condition 13(1)(c)(v) to minimise disturbance to red throated diver in the Outer Thames Estuary Special Protection Area (SPA) during construction of East Anglia THREE, these areas shall as far as practicable be avoided during transits from 01st November to 31st March.

The guard vessel ‘Tess’ will monitor vessel traffic in and around the East Anglia Three Offshore Windfarm 24hours a day, 7 days a week. The vessel will broadcast regular navigational warnings and will contact any non-project vessels they believe could cause potential hazards, risk of collision, or cause an interruption to project vessels or assets. She will be monitoring VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operaton.

Seaway Ventus will install 95 monopiles and transition pieces at the WTG locations set out in attached East Anglia Three Notice To Mariners 012 /2025. During the monopile and transition piece installation campaign, all vessels are requested to keep a 500m safety distance from the Seaway Ventus. 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)

During operations, the ‘Seaway Ventus’ 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.

Please be advised that Galloper Windfarm will be carrying out a major component exchange from the Jack Up Vessel (JUV) WIND ENERGY on 5 locations in the north field.

Planned Dates: 7th June 2026 for approximately 2 months - subject to weather

An exclusion zone of 500m is required around the JUV

The ERRV ‘ESVAGT CARPATHIA’ provides relief duties for standby emergency rescue services during thecommissioning phase of the East Anglia THREE Offshore Converter station (OFCS) ‘EA3 OFCS’. The ESVAGT CARPATHIA will be required to cover these duties when the primary Emergency Response Rescue Vessel 'ESVAGT CARTPATHIA' conducts port calls for crew changes and resupplies.

It is currently anticipated that weather permitting, operations will be carried out on an on-demand basis (i.e.weekly, bi-weekly, ad hoc).Arrival and departure plan of the 'ESVAGT CARTPATHIA' will be notified via the East Anglia THREE Weekly Noticeof Operations.Completion of the 'ESVAGT CARTPATHIA’s' work scope will be notified by closure of this Notice to Mariners.All vessels will continuously monitor VHF Channel 16 and VHF DSC Channel 70 throughout operations.It is currently anticipated that weather permitting, works will be carried out on a continuous 24-hour basis,seven days a week, unless notified otherwise.

The ERRV ‘ESVAGT COBRA’ provides standby emergency rescue services during the commissioning phase of the East Anglia THREE Offshore Converter station (OFCS) ‘EA3 OFCS’.  

 ‘ESVAGT COBRA’ will carry out regular transits between East Anglia THREE Windfarm and the port of Lowestoft and is equipped with VHF multi-channel radios and mobile phones.

THV Patricia has relocated the EA3 East 1 Buoy, EA3 East 2 Buoy, EA3 East Buoy 3 and the EA3 Special 3 Buoy marking the boundary of the East Anglia THREE Offshore Windfarm Array.

The demarcation buoys will remain on station throughout construction of the East Anglia THREE Offshore Windfarm.

For futher information regarding East Anglia THREE aids to navigation, please see attached EA3 Notice To Mariners 080- 2025 - Aids To Navigation – Demarcation Buoys.

East Anglia THREE will be a large offshore wind farm, located 69 km off the Norfolk coast. With a projected capacity of approximately 1400MW, the wind farm shall supply electricity to approximately one million UK homes. Onshore construction for the project started in July 2022. 

By use of multiple specialized offshore vessels,1 Offshore Convertor station (OFCS) & 95 offshore wind turbine generators (WTGs) will be installed within the East Anglia Three site boundary along with the associated inter array and export cables. The generated power will be transmitted via an installed External Cable (EC) from the OFCS to a shore side substation located in Bramford. 

Confirmed Unexploded Ordnance within the East Anglia Three CDM boundaries of the offshore windfarm array and export cable route.

Please be advised that Socotec 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.  

Mariners are advised to exercise caution in the vicinity of the identified locations and to avoid anchoring directly over the affected area. Additionally, mariners are advised to maintain a safe distance from the vessel, Glomar Wave, while it is conducting UXO target investigations. A 500m Exclusion Zone around the UXO position has been enacted. Mariners are advised to observe this measure to ensure safe navigation and to avoid any potential hazards.

The CNODE Maxi Acoustic Transponder Beacon was initally left in-situ on the 13/05/2026 with the intention to recover it. A recovery attempt was made on 18/05/2026 however, only the floater device surfaced. The beacon remains on/near the seabed.

Initial dropped object form submitted to all necessary parties on 13/05/2026 and updated form sent on 18/05/2026 following unsuccessful recovery.

Beacon dimensions:

• Length = 880mm
• Diameter = 150-160mm
• Weight (in air) = 35.5kg

See attached photo of beacon below. 

Following the commencement of the EGL2 nearshore English geotechnical investigation (GI) campaign along the EGL2 survey corridor, SSENT and NGET are advising Mariners of the loss of three CPT (cone penetration test) cones from the NG Driller within Notice to Mariners – Block 1 – Nearshore Surveys.

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

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.

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.

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 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. 

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. 

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.

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 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 

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.