News

SSEN Transmission plan to commence the marine survey inside 12nm on the 19th October 2026. The survey equipment will consist of Multi Beam Echo Sounder (MBES), Side Scan Sonar (SSS), Drop Down Camera (DDC) on a vessel. The survey equipment will also require calibration testing, which may be conducted out with the survey corridor.  The offshore survey works are being carried out by Triscom Ltd. They are expected to be complete all survey works by end of November. The area of work, pertaining to this Notice to Mariners (NtM) for Eday HVAC Subsea Cable, is highlighted in Figure 1, with survey area coordinates contained in Table 1. The survey vessel contact details for the project found in Tables 2 & 3. Contact details for the project Fisheries Liaison Team (FLO) are also detailed below. 

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.

Works involve towed equipment between a length of 100m and 250m behind the vessel and this will restrict the vessel’s ability to manoeuvre. It is requested that all vessels operating nearby maintain a safe distance (at least 500m) and pass at minimum speed.  All fishing activity should remain outside of the export cable corridor boundaries until further notice.  

The vessel will maintain a listening watch on VHF Channels 12 and 16 and will actively transmit an AIS signal. The vessel will comply with the International Rules for the Prevention of Collisions at Sea (COLREGS) at all times. Displaying the prescribed shapes and lights when the vessel is restricted in its ability to manoeuvre. 

Seabed video and photography data will be acquired using the eROV mounted camera system deployed from the USV Blue Eclipse.

The survey works shall provide seabed imagery along 26 selected 100m transects along the route illustrated in figure 1.1

As the Blue Eclipse will be station keeping with an ROV deployed, the vessel will be restricted in its 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. 

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 detail of the Seabed Met-Ocean Buoy Mooring that remain in place at SOWF (Excluding Buoy).

The CSOV ‘Norwind Hurricane’ will provide accommodation and Walk-to-Work access for the commissioning phase of the East Anglia THREE Offshore Converter station (OFCS) and WTG Commissioning.

It is currently anticipated that weather permitting, operations will be continuous for a duration of approximately four weeks. Crew change in port is carried out approximately every four weeks. This will be communicated in East Anglia THREE Weekly Notice of Operations. Completion of works will be communicated by closure of this notice.All vessels are required to monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout the operation.

The jack-up vessel ‘JB 120’ is positioned next to the East Anglia THREE OFCS within the East Anglia THREEOffshore Windfarm area. The vessel will depart from this location.ï‚· Jacking-Down Procedure: The Activity commences with the lowering of the JB 120. Once jackeddown the tugs will connect to the Jack Up Barge (JUB). Once the tugs are connected the JUB willretract its legs. From that point on the tugs are the sole means of station keeping for the JB 120ï‚· Rig move: The tow will depart from location following the leg retraction and continue towardsSchiedam.During operations, the ‘JB 120’, ‘Fairplay 38 (Lead tug), ‘Fairplay 27 (Assistant tug) and ‘Waterman’(Assistant tug) will be restricted in their ability to manoeuvre as defined under COLREGs (InternationalRegulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. Thevessels will also transmit an Automatic Identification System (AIS) message.A Statutory Safety zone of 500m radius will be in place around the JUB JB120 at all times.‘JB 120’ and supporting tug are supplied with VHF multi-channel radios and mobile phones.1.3. Program Schedule:The ‘JB 120’ is expected to demobilize at EA3 between 07/10/2025 and 13/10/2025. Works are subject toweather conditions.The progress of demobilisation works, and completion will be notified via East Anglia THREE WeeklyNotice of Operations. Completion of works will be notified by future Notice to Mariners.All vessels 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

Activity:

In partnership with Benthic Solutions Ltd, XOCEAN is chartering the Elysse II to conduct environmental seabed sampling investigations along the UK nearshore section of the proposed Woodstock Cable Limited cable route corridor between Hunmanby Gap, UK and Henne Strand, Denmark. 

The seabed sampling works will deploy equipment to sample the seabed at approximately 500m intervals between 3m and 15m water depth at the UK landfall of the route corridor. The vessel will be operational 12hrs a day.

Dates & Duration:

Survey operations are expected to commence from 13th October 2026 for approximately 3 days, subject to weather and other operational factors.

 Location:

The provided coordinates indicate the survey area within which the sampling will be conducted. In addition to the survey area, the vessel will transit from/to the port of Scarborough as required for mobilisation/demobilisation and weather shelter.

Vessel:

The workscope will be conducted form the Elysse II. Further details are provided in the table below.

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

The Q&E Consortium is installing and operating a new telecommunications cable. The purpose of the cable is to enhance telecommunications services between UK – France. Global Marine Systems Limited (GMSL) has been contracted to supply and install the subsea system. Operations took place in Q2-Q3 2025 and Q2 2026 to complete the works up to the Final Splice position. Upcoming operations are anticipated to continue in Q4 2026 to complete the Shore End works.

The works, managed by Prysmian, will be carried out between 10th October 2026 and 31st January 2027 (weather dependent). Mariners are advised that these works will be taking place within areas already closed as part of the ongoing Identification and Clearance Works.  Vessels, when transiting, are requested to pass at a safe speed and distance of at least 500m from the Works Area. During the ongoing works, the vessel will have restricted manoeuvrability as it completes the work scopes.  VHF CH 16 will be monitored at all times and will be used to contact the coastguard in the event of an emergency.

A support vessel will escort the USV from the harbour entrance until open water. The USV will then continue transiting towards the survey site. It is requested that other vessels remain clear, so far as is practicable, during transit & survey operations. Although the vessels are unmanned, it is crewed throughout the 24-hour operation, piloted remotely using 360-degree cameras and other navigational aids

The only means of direct VHF communications with the vessels is on VHF Channel 16 Project vessels are advised to contact Seagreen Marine Control on VHF private channel P1 when entering or traversing within the windfarm.

All mariners are advised to keep a safe clearance distance of no less than 500m from the USVs and inspected Asset. 

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).

This is to inform you that GEOxyz has been contracted by ScottishPower Renewables to carry out a geophysical site survey within the EA2 offshore survey area in the North Sea, approximately 46 km off the east coast of England.

Please be advised that GEOxyz will be carrying out survey operations within the survey area located in the North Sea, approximately 46 km from the east coast of England covering an area of approximately of 218 km2.

The table below show the location of the survey area and the coordinates (Lat/Long) of the polygon within which the investigation will be carried out.

Latitude Longitude

52°14.96294’N2°13.12029’E

52°13.90024’N2°08.30780’E

52°03.91396’N2°07.38213’E

52°02.96417’N2°08.73064’E

52°03.03457’N2°19.59678’E

The geophysical site investigation will be conducted with the Geo Ocean IV, a 41.9 m survey vessel with 20 days endurance for 24 hours operations.

GEOxyz has been contracted to conduct a multibeam echosounder (MBES) geophysical survey, including backscatter data acquisition within the survey area to determine the seabed elevation and morphology at each planned WTG location.

The survey will be conducted 24 hours a day. No towed equipment will be deployed outside of the vessel, as the multibeam echosounder used for this survey is hull mounted.

Survey operations are anticipated to commence around 2 October 2026 subject to weather conditions. The expected duration is 20 days.

Estimated completion date for operations is 23 October 2026, weather permitting.

Overview

The survey will be within the export cable route and wider seaweed management area. It should be noted that BBWFL are not requesting fishermen to relocate gear - on this occasion the vessel will work around any gear on location. The survey work is being undertaken by ABPmer and will be conducted from the Sagittarius.

Survey Duration  

The survey is planned to be undertaken within the period 28 September to 4 October 2026, subject to weather and operational constraints. Survey operations are expected to require up to three days within this period. BBWFL would like to extend this notices' validity to 31 October 2026 to account for any delay. BBWFL will send a further notice to confirm completion of the survey.

Survey Tasks  

During the survey campaign, the vessel will deploy an underwater drop down video/camera to gather data on the extent and distribution of kelp.  No towed gear operations will be undertaken. The vessel will be generally unrestricted in its movements and will adhere to normal navigation protocol.  The survey area is defined by the following WGS84 coordinates in Table 1.  

For full details, please refer to the Notice to Mariners attachment to this notification. 

The seabed frame will be equipped with a 600KHz Acoustic Doppler Current Profiler (ADCP). The ADCP will measure the current speed and direction at this location for campaign duration. 

A marker buoy will be connected by rope to the frame to indicates its location. The buoy will be an orange inflated buoy, approximately 0.6m in diameter.

The vessel being used for the retreival will be confirmed shortly. During the recovery, the VHF Channel monitored will be Ch 16. 

SSEN Transmission conducts marine surveys to obtain information on seabed morphology, installation design and sediment structure, and to support benthic characterisation and habitat mapping. The survey will be conducted by Reach Subsea UK Ltd on behalf of SSEN Transmission. Survey activities are scheduled to recommence within Yell Sound on 16th October 2026, with all outstanding survey works expected to be completed by 30th November 2026, subject to weather and operational conditions. 

Commissioning works are expected to be completed circa 31st October 2026.

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's) Acta Gemini' 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.

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.

  NtM Update 11/09/26: Additional offshore survey vessel: Ocean Geograph - See Table 1 below. Additional  Scout/Guard Vessel: GV Ability – See Table 2 below.

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.

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. 

Update 10/08/2026:

The nearshore vessels Titan Discovery and Titan Endeavour will shift from 12-hour to 24-hour survey operations; the guard vessel Seiont-A will shift from 12-hour to 24-hour operations. No other material change to the work is planned to date.

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 07/10/2026, continuing until 31/11/2026 when all locations have been surveyed. The works will be continuous, 24 hours a day. A charts of the DBA and DBB Array Area coordinates are provided below

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

The vessel will maintain a listening watch on VHF Channel 16 and will actively transmit an AIS signal. The vessel will comply with the International Rules for the Prevention of Collisions at Sea (COLREGS) at all times. 

Grand Canyon III will conduct trenching and burial operations supporting the cable-laying operation. Duringcable deployment, trenching & burial all vessels involved will be restricted in their ability to manoeuvre.Seaway Moxie, Norside Supporter & Windea Clausius will undertake equipment and personnel transfers toWTGs and the OFCS via a Walk‑to‑Work (W2W) gangway system. While conducting these transfers, theSeaway Moxie, Norside Supporter & Windea Clausius will also be restricted in manoeuvrability.Rix Lion & HST Poole will be the CTV support vessels providing 24hr support covering both cable installationand T&T works.1.3. Program Schedule:Seaway Moxie has mobilised already and are actively operating on the project since January 2026.Windea Clausius and Grand Canyon III have mobilised already and are actively operating on the projectsince February 2026.Norside supporter has mobilised already and is actively operating on the project since August 2026.Rix Lion has mobilised already and is actively carrying out crew transfer operations.HST Poole is expected to mobilise circa 03/10/2026During the cable laying operations, ‘Grand Canyon III’ will have restricted manoeuvrability as defined underCOLREGS (International Regulations for Precenting Collisions at Sea 1972.) They will display theappropriate day shapes and lights and will transmit an Automatic Identification Systems (AIS) message.All project vessels will monitor VHF Channel 16 and VHF DSC Channel 70 continuously throughout theoperation. 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.Completion of works will be notified by closure of this notice to mariners; weekly updates of vesselmovements will be notified via EA3 weekly notice of operations

The JUV will facilitate all lifting activities and main component exchanges at: A17, U10, M12, G05, Q09. 

A 500m clearance to the vessel and all fixed structure locations whilst working in this area is required, 

Mariners are advised that the Northern Wind will be conducting a full site survey using high resolution MBES (inc Backscatter).  The Cardinal P will be conducting a full site internal survey with the use of ROV.  A 500m clearance to the vessel and all fixed structure locations whilst working in the area is required.

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.

Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence major component repairs on five Wind Turbine Generators (WTGs) as shown in Table 1 These activities will be undertaken using the Jack-up vessel, Wind Discovery, detailed below. Activities are now expected to take place between 14/10/2026 and 01/12/2026 weather permitting.

Table 1: WTG location

Table 2: Vessel Information

Please be aware that, during the major repair activities, by virtue of its mode of operation the Jack-up vessel 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 Wind Discovery and their crew, and the ability to undertake its contracted works, fishermen who have static fishing gears deployed within 500 m from the WTG where major repairs are planned (see Table 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-lostgear#marking-of-fishing-gear).

The Scottish Ministers have authorised the establishment of a 500-metre radius safety zone around all major maintenance works being undertaken. The safety zones will be active when the jack-up vessel involved in undertaking major maintenance works is attached to, or anchored next to, the renewable energy installation. No more than one 500 metre major maintenance safety zone will be active at any given time.

All mariners are requested to give a wide berth to all vessels involved in the major repair activities.

Mariners are requested to navigate with caution, to use all means appropriate to aid safe navigation as defined under COLREGs Rule 7, and keep continued watch on VHF Ch. 16, 87 and 73 when navigating the area.

1.      Contact details

The following contact can provide more information if required. Please note that specific queries can also be addressed to the relevant vessel or shore-based representative.

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. 

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

Out of Service Cable Removals

5 x OOSCs are to be removed during October by use of WROV, SMT, and Sea Axe Controlled Flow Excavation tool. Cables will be surveyd, excavated, cut and recovered. Clump weights will be isntalled and secured at the "open" ends of the cables on the seabed.

See detailed map on our bulletin website

This has been issued to update mariners on the upcoming major component exchange which will take place within the Moray Offshore Windfarm (West) Limited (Moray West) site. The start date for works has been delayed, and works are now to take place in September/ October 2026 and will last approximately 14 days (subject to weather).

The works comprise a transformer exchange which will be carried out at two locations: WTG EO8 and WTG L09 (Table 1). The works will be carried out utilising the jack-up vessel “Wind Peak” which will be required onsite for the duration of the works, with client reps in place throughout. There will be a ERRV (Emergency Response & Rescue Vessel) in the field 24 hours a day to provide cover for the JUV and an additional CTV for support. Details of these vessels are provided in the attached NTM.

Re-surveyed March 26

See detailed map on our bulletin website

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 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.

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 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.

XOCEAN USVs and Support Vessel are shown in the attached notice, along with contact information for the vessels, as well as the Fisheries Liaison Team. The USVs are expected to operate out of Oban for the full survey duration. The survey will commence with USVs with hull mounted survey Multibeam Echosounders and Sub Bottom Profiler’s (SBP), as well as a towed Sidescan Sonar (SSS) and Magnetometer. A crewed Support Vessel will be chartered throughout the survey to support the USVs with departures and arrivals from Ardentallen and assist in towing them back in if a technical issue occurs.

Venterra are planning to deploy one Floating LiDAR Buoy in the area around the NOAH Met Mast. Deployment operations will take place using the FCS Vega on or around 30th September 2026, weather permitting. The buoy will remain on station for a minimum of 1 month.

RWE Renewables UK Wind Ltd at Rampion windfarm would like to inform mariners that we are carrying out essential maintenance on the wind turbines.  This work is due commence at the earliest from 29th September 2026 within the Rampion OWF Area, depending on weather.  The works involves; Using a jack up vessel to exchange large components in the nacelle of the turbine at G02 and J14 location using the vessel crane.  The current outline planning is as follows: 

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. It is anticipated that all ROV operations will be undertaken from the eastern shoreline at cable location SHEPD 122 Cliftsound. 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.  

North Falls Offshore Wind Farm - Notice to Mariners. Issue Date 24/09/2026 (Third issue). 

Overview

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

Survey Duration  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. 

Survey Tasks (Service Visit No. 2) 

The metocean survey work is being undertaken by Partrac, who will use the vessel Tom Scruby 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 five days, commencing on or after 29 September 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. 

The metocean equipment is not marked with surface buoys. 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.

THE ENERGY ACT 2004

NOTICE OF APPLICATION FOR SAFETY ZONE SCHEME DURING MAJOR MAINTENANCE OF THE GUNFLEET SANDS 2 OFFSHORE WIND FARM AND GUNFLEET SANDS 3 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 Gunfleet Sands Limited (company number 04019207) and Orsted Gunfleet Sands Demo Limited (company number 07307044), each 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 Gunfleet Sands 2 Offshore Wind Farm and Gunfleet Sands 3 Offshore Wind Farm during periods of major maintenance.

The application is for 500m safety zones around any Wind Turbine Generator 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 CAVAL@orsted.com (referencing ‘Gunfleet Sands 2&3 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 30th of October 2026.

All mariners and stakeholders are advised that CMOS Installer has completed export cable 2 burial operations. Some areas remain which will require remedial burial at a date to be promulgated in an update to this notice. In addition, two rock bags could not be recovered from the nearshore area and are regarded as dropped objects.

Further information is noted in the attached Notice to Mariners

The marine survey activities for Western Link 2 will commence on the 13/07/2026 and includes geotechnical, benthic, and geophysical 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 geotechnical work will be undertaken by survey vessel Geo Ocean VI and the nearshore geotechnical 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.

The offshore benthic survey work will be undertaken by the survey vessel, Roman Rebel, and will consist of grab sampling.

The offshore geophysical survey work will be undertaken by survey vessels Frontier, Seeker, and USV Blue Essence 6.

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

See detailed map on our bulletin website

See detailed map on our bulletin website

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 on www.kis-orca.org

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. 

Scottish Hydro Electric Power Distribution (SHEPD)

PH003762 Skye-Uist Replacement

Notice to Mariners

Please be advised that Jan De Nul Luxembourg S.A. has undertaken power cable installation and power cableprotection activities for the Skye-Uist Replacement project. The project comprises two new subsea powercables: one between Loch Pooltiel on the Isle of Skye and Loch Carnan on the Isle of South Uist and the otherone between Ardmore on Isle of Skye and Loch Pooltiel on Isle of Skye.

This notice supersedes the earlier Notice to Mariners dated 26/08/2026. The cable installation andprotection work described in the previous Notice have now been completed, except for the cable end atArdmore Bay, Isle of Skye.

The cable end at Ardmore Bay was previously placed in wet storage on the seabed surface within thedesignated storage area indicated in Figure 4. The vessels and associated equipment will return to ArdmoreBay to undertake the recovery of the cable end from wet storage, followed by the pull-in of the cable towardsthe landfall

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

On completion of transition piece foundation completion work scopes this week, Siem Barracuda will remobilise for jacket foundation pin pile soil plug removal works.

 em Barracuda is expected to commence soil plug removal on or around the 23rd of September, the works will continue for several weeks, vessel detail below.

On behalf of Inch Cape, N-Sea will continue 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 Notice to Mariners..

Inter array cables will be surface laid and pulled into the sub station and foundation structures from the cable lay vessel Altera.

The service operations vessels Olympic Taurus and DOS Notus will transfer cable preparation and pull in teams to the offshore platform and foundation structures utilising walk to work systems.

Inter Array cable burial shall be conducted by the North Sea Enabler which is expected to arrive at the work site to commence operations on or around the 26th of September.

Operations shall be supported by the crew transfer vessels MCS Pampero and NR Revolt.

Cable installation operations are expected to continue for several months.

Please be advised that XOCEAN, on behalf of Bellrock Offshore Wind Farm Limited, are continuing ageophysical survey within a potential offshore cable export corridor associated theBellrock Offshore Wind Farm. The Geophysical Survey is estimated to take 60 days to complete (between9 August 2026 and 30 November 2026 allowing for weather and operational constraint).The GeophysicalSurvey commenced on 9 August 2026.

Please also be advised that INSPIRE, on behalf of Bellrock Offshore Wind Farm Limited, will be undertakinga benthic survey within the same potential offshore cable export corridor associated theBellrock Offshore Wind Farm. The Benthic Survey is estimated to take up to 25 days to complete (between14 September 2026 and 31 October 2026 allowing for weather and operational constraint).

The Jack-up vessel Wind peak will carry out the replacement of the main bearings on two assets within the Beatrice Windfarm, these locations will be at WTG BE-K06 and WTG BE-L08.

This work will start on the 1st of Ocober 2026 and will be complete by the 20th of October.

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 campaign was completed on 11 September.

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.

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.

Mariners are advised that a marine cable route survey is planned for the proposed Eday HVAC Subsea Cable. The survey will involve geophysical surveying. SSEN Transmission 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.

SSEN Transmission plan to commence the marine survey on the 21/09/2026 however the earliest start date maybe 18/09/2026. The survey equipment will be deployed on a survey ROV and will consist of Multi Beam Echo Sounder (MBES), Side Scan Sonar (SSS), Sub-Bottom Profiler (SBP), Magnetometer, 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.The offshore survey works are being carried out by Reach Subsea UK Ltd. They are expected to be complete all survey works by end of October 2026, weather dependent.

General Safety AdviceThe vessel will be restricted in ability to manoeuvre at all times 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 vessels 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 vessels will also transmit regular Automatic Transmission Identification System (AIS) Messages.

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 campaign was completed on 11 September.

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.

Five locations are identified within the Norfolk Vanguard East array site and five identified within the export cable route.  Those locations are presented below.

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

The survey will be conducted by the survey vessel Ramform Vanguard” (Callsign: C6JF5).

As the survey vessel will be restricted in its ability to manoeuvre when surveying, due to the deployment of the towed survey equipment from the vessel for the duration of the survey activities, other vessels are kindly requested to keep a wide berth. The vessel will display appropriate lights and signals.

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

Daniel Bernoulli will start operations on 30th of Auhust 2026 and will perform rock placement during multiple loadouts, finishing her scope around 10th of October 2026. Work will be continuous, 24 hours a day.

During operations, Daniel Bernoulli 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.

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

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 current phase of cable burial and protection works in Irish waters is complete for 2026. As a result, the majority of the route is now being re-opened to fishing activities. However, two defined offshore areas will remain temporarily closed until the cable burial and protection is complete, currently expected in 2027.

The two defined areas that will continue to remain temporarily closed to fishing activities are shown with the below coordinates. The two areas include a temporary closure of +/- 1000m either side of cable route. All other areas are re-opened to fishing activities.

Guard vessels

• Two guard vessels remain on site along the temporary closed areas in Irish waters.
• A third guard vessel is available to provide additional support if operationally required.
• The guard vessels will continue to provide daily safety broadcasts and further operational information to passing vessels.
• The vessels will keep a listening watch on channel 16 and transmit an AIS signal

The updated guard vessel (GV) list is shown below:

1. GV Lapwing
2. GV Star of Hope
3. GV Accord (standby)

The position of the vessels will be subject to rotation of the vessels and associated locations. 

As part of the marine operational works in Irish waters, subsea rock installation has been used to protect sections of the cable route. Further information on the locations of the subsea rock installation along the route will be made available soon.

There are no further operations planned in Irish waters this year for the Celtic Interconnector project, further information on 2027 operations will provided as they become available.

Activity:

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

In addition to survey operations within the OWF array areas outlined above, survey activities will also be conducted along the export cable route (ECR) connecting Eneco Luchterduinen OWF to the Dutch coastline, as detailed below.

Duration:

Survey operations are expected to commence from 11th September 2026 for approximately 6 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

Mariners are advised that Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) has completed the replacement and burial of the Orange-D inter-array cable (IAC). However, a short section of the Orange-D IAC remains below target burial depth and is identified as a seabed hazard.

Mariners are requested to avoid the area defined by the coordinates provided in Table 1. 

Table 1 – Coordinates for the seabed hazard - exposed IAC (Orange-D)

Mariners, particularly those operating small craft or deploying anchors, fishing gear, or other seabed contactequipment, are advised to exercise caution in the vicinity of the identified location due to thepotential snagging and anchoring risk and should avoid anchoring directly over the affected area.

Please be advised that Socotec Land & Hydrographic Surveys (on behalf of SHEPD) will be undertaking subsea inspections across the North Coast & Orkney 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. 

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 Outer Hebrides marine areas. Please refer to Figure 1 - Figure 7 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. 

On behalf of Inch Cape Offshore Ltd, Seaway 7 shall commence the installation of WTG jacket foundation pin pile components. There will be three pin piles installed in the seabed at each of the 18 jacket locations throughout the Inch Cape Site.

The pin piles will be transported from the Port of Leith to the Inch Cape site and installed in the seabed using a pile installation frame, as shown in the attached Notice to Mariners

The installation vessel, Alfa Lift, is expected to arrive at the Inch Cape site on or around the 31st of August to commence installation activities which will continue for several weeks, further detail in the attached Notice to Mariners

The works, managed by Prysmian, will be carried out between 5th September 2026 to 15th October 2026 (weather dependent). 

Mariners are advised that these works will be taking place within areas already closed as part of the ongoing Identification and Clearance Works.  Vessels, when transiting, are requested to pass at a safe speed and distance of at least 0.5 nautical miles from the Works Area. During the ongoing works, the vessel will have restricted manoeuvrability as it completes the work scopes. VHF CH 16 will be monitored at all times and will be used to contact the coastguard in the event of an emergency.

The SOV Norside Cetus will mobilise from the port of Montrose circa 29th August 2026 for a period of what is expected to be two months.

The Norside Cetus will replace the Esvagt Brint as the site vessel.

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 lost cone is not considered to pose a hazard to general navigation.

•       Based on the data at the time of loss and the length of lost equipment vs. the penetration into the seabed, it is believed that the lost rod will not likely be protruding from the seabed.

•       However, the lost cone may be a potential snagging risk for fishing gear, etc. Furthermore, they may present a risk to small vessels when anchoring or operating gear near the seabed in close proximity to the location detailed in the table below.

•       WL2 is in regular contact with the local Marine Management Organisation (MMO) coastal officers; a dropped object / lost gear form is in the process of being submitted to the MMO for the lost cone.

Mariners are advised of the completion of marine activities in relation to the Orkney HVAC, GVI & Mattress works.

The completion of the works includes the installation of several mattresses at the locations highlighted in  the attached NTM. These assets will facilitate  cable installation works in early 2027.

As such, until the final cable is installed, these assets pose a hazard to marine users. Mariners are therefore advised to maintain a stand-off of 500m from this asset until further notice.

Contact details for any queries can be found in NTM.

Activity Description:‘VOSTraveller’ will provide standby emergency response and rescue within the boundary of the East AngliaTHREE Offshore Windfarm Array. The ‘VOS Guardian’ will be the relief vessel to cover these duties when theprimary emergency response and rescue vessel ‘VOS Traveller’ conducts port calls for crew changes andresupplies.1.3. Program Schedule: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.Arrival and departure plan of the VOS Traveller & VOS Guardian will be notified via the East Anglia THREEWeekly Notice of Operations.Completion of the vessels work scope will be notified by closure of this Notice to Mariners

The works, managed by Prysmian, will be carried out between the 7th August 2026 to 15th October 2026 (weather dependent). 

Vessels, when transiting, are requested to pass at a safe speed and distance of at least 0.5 nautical miles from the Works Area. During the ongoing works, the vessel will have restricted manoeuvrability as it completes the work scopes.  

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

The works, managed by Prysmian are expected to start on or around the 8th August 2026 and are expected to complete on or around the 30th December 2026 (weather dependent).

The first phase of the works will include exit pit and trench excavation, which is expected to take place between 8th August to 15th October 2026. The works will be carried out by Capall Mara (barge) and Manannan (crew transfer vessel).

Following this, HDD marine assistance works will be expected to take place between 15th September and 30th December 2026. This Notice to Mariners will be updated to include the vessels working on the next phase of work.

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 1km from the Works Area. Works will be ongoing and the vessels will have restricted maneuverability as they complete their work scopes.

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.

Crew Transfer Vessel NOS Exceeder 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.

NOS Exceeder is expected to mobilise from the port of Lowestoft circa 01/08/2026.

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

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. 

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

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. 

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

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.

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. 

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.

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.

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.