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The Kingsborg will conduct 24-hour diving operations in support of subsea inspection and investigation activities. The campaign is expected to last approximately 35 days and will involve vessel, diving, and subsea support operations at Minerva M1 Block 47/04 and Mercury MY02 Block 47/09 within the Southern North Sea.

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.

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.

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The RRS Discovery will be conducting sediment sampling with box core, multicore and SPI camera, and sampling the water column behind a chartered fishing vessel in 4 sites during July and August. An instrumented seabed lander will also be deployed at each of the 4 sites for up to 5 days. These sites are fishing grounds and close to some navigation routes. The RRS Discovery will have restricted manoeuvrability during these operations.

1. Seabed landers - These will be deployed at each site for up to 5 days. The RRS Discovery will remain in the region during the deployment. The seabed lander is an instrumented subsurface buoy reaching 4 metres above the seabed with a 15 m recovery line and pellet buoy attached to the top of it. The system has no surface presence during deployment. We request vessels to not fish close (<200m) to the lander during the deployments. Please contact the RRS Discovery over VHF if needed.
2. Sediment sampling - The RRS Discovery will have restricted manoeuvrability sediment sampling activities in the areas. 
3. Water sampling - The RRS Discovery will have manoeuvrability whilst conducting water sampling with towed instruments and CTD. This will include sampling close to a chartered fishing vessel at each site. 

Our work at each site will occur during these approximate dates.

Site C – Clyde- 24/7/2026 – 28/7/26

Site B – Western Irish Sea – 29/7/26 – 2/8/26

Site A – Cumbria – 4/8/26 – 8/8/26

Site D – South of Isle of Man - 9/8/26 – 13/8/26

The RRS Discovery has deployed an instrumented seabed lander on 08/08/2026. This lander presents a hazard to towed fishing gear and requested an exclusion of 500m around the lander location for any trawling or dredging.

The lander is reaches 4m off the seabed with a small recovery buoy attached by a 15m line. There is no surface presence. Recovery of the lander is planned on the afternoon of August 12th 2026. 

Please contact RRS Discovery over VHF to confirm the position as needed. 

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.

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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.  

Scottish Hydro Electric Power Distribution (SHEPD) 

Date of Issue:11th August 2026 

Please be advised that Briggs Marine Contractors (on behalf of SHEPD) will be undertaking earthing and split pipe remedial works within the nearshore environment at Head of Work, Orkney.  

Please refer to Figure 1, that shows the location of the full cable route, the working area is defined by the red box.  Please also refer to Table 1 overleaf, which lists the coordinates.  

Works at Orkney are expected to commence 17th August and are expected to take 1 day to complete (weather permitting). 

Please be advised that BDS on behalf of SHEPD will be conducting remedial works within the intertidal area at Doun Helzie, Sanday 

Proposed works involve the removal of out of service subsea cable in the intertidal area between Mean High Water Springs and Mean Low Water Springs. 

Works are proposed to commence from 11th of August and complete by 14th of August 

Please refer to Figures 1 and 2, which show the location and proposed works area.  Please also refer to Table 1 overleaf, which lists the coordinates of the working area.

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 the 20th August 2026 (subject to weather). Survey Area: Figure 1 below indicates the operational area in red. This is outlined in Table 1 below also.  

1.       All mariners are to be advised that there will be a power outage at Aberdeen Bay Windfarm for approximately 5 days 24/08/26 -  28/08/2026 . This is due to maintenance of the national grid. During this period navigational aids may be disrupted on the Wind Turbine Generators (WTG’s) Please navigate with extra caution during this period.

1.1   Area of operations:                                        WGS84

Latitude               Longitude

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

1.1.2 Schedule

DATE OF OPERATION START: 24/08/2026

TIMES OF OPERATION: 24hrs

LENGTH OF OPERATION: 5 days

The Ndurance will be working 24 hours and is expected to depart the Port of Blyth end of August then transit to Liverpool Bay, estimated in the field ~ 14th September 2026 (weather dependant) 

Main cable lay activities will take place along the Liverpool Bay CCS Cable Construction Area and Temporary Anchor Zone (See Figure 1 and Tables 1 & 2 below).  

Cable lay activities are planned to begin inshore within Block A at Talacre Beach and progress offshore through Gwynt Y Môr Wind Farm towards the Douglas platform which may include laying cable within the Liverpool Bay Traffic Separation Scheme whilst RAM over the coming several weeks. Notices will be issued to the relevant authorities before activities are planned begin within the Liverpool Bay TSS. 

 The Anchor handling vessels ‘Tom Scruby / Costal Vanguard / Will Discover’ will also assist the CLV during the cable laying activities which will include anchor deployment/recovery within the Nearshore locations (Blocks A-D) and estimated to be in the field from ~ 10th August on other activities, assisting the CLV from ~14th September onwards. A project Scout vessel will be in attendance of the CLV to assist with locating fishing gear and liaising with fishing vessels in the area and reporting to the OFLO onboard the CLV.  

 Also, Project Guard vessels will be deployed along the newly laid cable route and updates to this notice will be given once vessel details become available. 

 Associated support vessels details and activities have been supplied within LBCCS NtM 009. General Notice of Operations will be issued during the cable construction period. 

     Mariners are advised to always maintain a safe distance (of at least 500m) from vessels at all times. 

 For further information, Please contact the Company Fisheries Liaison Officers.

The purpose of the survey would be to monitor any change in the nearshore area surveyed this June and to extend the survey outwards as time allows to enable further comparison with 2025 survey. 

The survey will be conducted under Nexans Contract with Ocean Kinetics utilizing Firth Explorer a small Catamaran type vessel.

Please be aware, two of the five fog horns on the assets at the Kincardine wind farm are inoperable at the present time (Kin-04 and Kin-05). Seafarers are asked to take care when navigating the area in poor visibility.

Reach Subsea UK LTD are conducting an offshore survey campaign on behalf of Scottish Hydro Electric Transmission Plc. Trading as Scottish and Southern Electricity Networks Transmission (SSENT). SSEN Transmission commenced the marine survey inside 12nm on 28th March 2026 with X-Ocean Nearshore works completed. The nearshore geophysical survey vessels (Unmanned Surface Vehicles (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 outside of the survey corridor. The Survey Vessel C-Trojan will be conducted by Reach Subsea UK Ltd mobilising 28th August 2026 and is estimated to be completed on the 11th September 2026.

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 and nearshore benthic survey work will be undertaken by survey vessels, Roman Rebel and Seren Las, respectively, and will consist of grab sampling.

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

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

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 HAEVA Mobile Offshore Drilling Unit (MODU) will be deployed to commence the P&A & WHPS removal activities at Leman Southwest 53/02a-15Y

Date of commencement: earliest start date: 15th August 2026

Date of completion: Latest end date: 14th September 2026

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.

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.

Please see attached Notice to Mariners for full details.

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.

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. 

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.

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Partrac Ltd., on behalf of Southern Water and Port and Coastal Solutions, will deploy metocean equipment at three locations along the south coast of England: Sandown, Hayling Island and New Romney. The works comprise deployment of three seabed frames, each fitted with a Nortek Signature 1000 Acoustic Doppler Current Profiler (ADCP), to collect current profile data for a minimum campaign duration of 35 days. Deployment will be undertaken subject to suitable weather, marine licence and Crown Estate requirements from the 17 of August 2026 for approximately 3 days. During deployment and recovery activities, the vessel will be restricted in its 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 50 m from the installation vessel during operations and from the deployed equipment, and to pass at a safe speed. Should adverse weather conditions occur during the works, the vessel will seek shelter at the master’s discretion.

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.

The vessel will be carrying out the Works in the Norfolk Vanguard Offshore Export Cable Corridor. 

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GAC07 Blade Bearing

GAD05 Blade Bearing

IGE13 Blade Bearing

IGE08 Transformer

2 x Generators TBC 

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)

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.

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 Tweed, Windea Carnot, Windea Clarke 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, Grampian Tay 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.

The ERRV Esvagt Castor will provide support for helicopter crew changes at the Dogger Bank OffshoreWindfarm 

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. Grand Canyon II will  continue IAC post lay burial operations. Flintstone will  conduct scour protection installation.

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Re-surveyed March 26

The MH Freedom is estimated to mobilise 10 August 2026 to install the Dead Man Anchor (DMA) in preparation for he main offshore pipelay works. Deployment operations are expected to take ~ 24 hours, however the anchor will remain in place for ~ 3 weeks and will be retrieved by the MH Freedom once pipelay installation activities has commenced.  

The works will involve the controlled placement of the DMA within Block 1 of the NEP Pipe Construction Area, DMA deployment position is provided in Figure 1 and Table 1. 

 Mariners are requested to maintain a safe distance of at least 500 m from the DMA at all times and to navigate with caution when operating in the vicinity. 

 The MH Freedom will remain onsite to guard the DMA until it is retrieved. 

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The works will be undertaken by the Simon Stevin and are anticipated to commence on or around 13th August 2026, continuing intermittently until approximately 30 November 2026, subject to weather, operational requirements and programme changes. 

The works will involve the controlled placement of rock and gravel in areas where sufficient burial of the pipeline cannot be achieved and will take place within the NEP Pipeline Construction Area

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Activity:

Mariners are advised that XOCEAN will be utilising the Geo Ranger to conduct geophysical & UXO survey activities in the UK and Danish North Sea sectors, from July 2026. The vessel will be engaged in survey activities between Hunmanby Gap, UK and Henne Strand, Denmark on behalf of Woodstock Cable Limited.

Survey Equipment:

The survey equipment will consist of multibeam echosounder (MBES), Sub-bottom profiler (SBP), sidecan sonar (SSS), ultrashort baseline acoustic positioning system (USBL) and magnetometer (MAG).

During survey operations, the vessel will be operating at approximately 4 to 5 knots with equipment being towed approximately 200m astern. 

Dates & Duration:

Survey operations are expected to commence from 24th July for approximately 5 weeks, 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 with survey extents between the UK terratorial waters boundary and the Danish 15m contour. The vessel is expected to be operating within +/- 150m of this route. In addition to the survey area, the vessel will transit from/to the below ports for weather shelter. Mobilisation/demobilisation will be from Ijmuiden, Netherlands.

• Ijmuiden, Netherlands
• Eemshaven, Netherlands
• Esbjerg, Denmark
• Blyth, UK
• Hull, UK
• Newcastle, UK

Vessel:

The workscope will be conducted from the Geo Ranger. Further details are provided in the Table below.

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. Seafarers are requested to provide a minimum clearance of 500m from the survey vessel during marine operations and pass at a safe speed. VHF Channel 16 will be monitored by the vessel at all times. The vessel will also transmit regular Automatic Transmission Identification System (AIS) Messages. The proposed works will be 24 hours a day.  

Fisheries Liaison:

Fisheries liaison representation is provided by Seagard whose contact details are provided below. A scout vessel will be utilised where it is deemed necessary.

The JUV will facilitate all lifting activities and main component exchanges at: 

â–ª A10 - Generator Replacementâ–ª E11 - Main Bearing Replacement.â–ª G05 - Main Bearing Replacement.â–ª Q13 - Main Bearing Replacement

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.

The vessel is estimated to be on site ~20th August to begin PLGR activities within Blocks A, B & C of the Liverpool Bay CCS Cable Construction Area ahead of cable laying activities. The SLM Feije will remain in the field once PLGR is complete to support cable lay activities.   

Mariners are advised to always maintain a safe distance (of at least 500m) from vessels at all times. 

Survey trials of remotely operated Uncrewed Surface Vessels (USVs) are being conducted by XOCEAN from 21st May 2026. The trials will utilise the XO-580 USV and extend from Newgale, Wales to approximately 40km offshore. Operations will be conducted within a 500m corridor. 

Trials are anticipated to be complete by 19th August 2026, subject to weather and other operational conditions.

Trials will be conducted using the XO-580 class USV. Further etails are contained within the attached Notice to Mariners. 

It is requested that vessels operating within 1NM of the USVs proceed with caution, and a clearance distance of 500m is maintained at all times.

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.

As part of field decommissioning operations, the following field infrastructure will be removed using two vessels Edda Freya and Olympic Ares over two months.

•            Tie in spools from PL310 (Sean Papa to Sean Romeo production flowline) - completed

•            Tie in spools from PL311 (Sean Papa to SSIV to Bacton production flowline) - completed

•            PLU5156 (Sean Papa to Sean Romeo power cable; 4.89 km in length) - completed

•            PLU5157 (367 m Sean Papa to SSIV hydraulic umbilical; 367 m in length) - completed

•            SSIV - disconnected - to be removed mid September

•            Mooring buoys - partially removed.

Campaign with Olympic Ares is completed.  Final removal of SSIV will be completed by Edda Freya from Mid September 2026.

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C3 rock placement works will be carried out by Flintstone vessel, starting from 13th August 2026 for 8 days. Dates are subject to change due to weather or operational requirements.

Please see attached Notice to Mariners for supplementary information. 

Crossing points are detailed below. 

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Phase 1 of the surveys shall be conducted on a 300x300m box centred on each of the 10 noted locations.

Phase 2 of the surveys shall be conducted throughout the wind farm along the various cable routes defined in the attached notice.

Ithaca Energy is undertaking the decommissioning of the Greater Stella Area (GSA) field facilities, located in central North Sea Blocks 30/06, 30/01 and 29/10. GSA has been developed via a number of subsea tie-backs (Stella main drill centre (MDC), Stella north drill centre (NDC), Harrier, Abigail and Vorlich), and associated subsea infrastructure (manifolds, infield pipelines, gas lift lines, umbilicals, risers and riser bases), and export pipelines (gas and oil), which were tied into the floating production facility, the Stella FPF-1. 

The Stella FPF-1 has been removed from location. Activity will remain in field through July - Oct to remove the MWAs and other infrastructure. 

Some items will remain wet stored in the GSA for later recovery.

MARLIN AIS is in place to track activity in the area.

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

 Mariners are advised to maintain a stand -off of 500m from the area stay until further notice.

This OBN survey will utilise three vessels: Siddis Mariner (node handling), Sanco Sword (seismic source) and Tanux III (support vessel).

Siddis Mariner will deploy acoustic sensors (nodes) using ROV’s on the seafloor around the Odin and Frigg fields, starting at the northern edge of the survey area. The nodes will be deployed 200m apart in lines up to 25km in length, with a line separation of 200m. Up to 25 lines of nodes are deployed at once.

Working in tandem with the Siddis Mariner, Sanco Sword will deploy a 200m towed 800 cubic inch seismic source up to 5km around and over the deployed node patch in an east / west direction, gradually moving southwards with each line. Once a node line has been covered by the seismic source, each node is recovered by ROV and processed for use on another section of the survey.

Tanux III will act as the support vessel for both Siddis Mariner and Sanco Sword.

Please note that the area defined in this notification will not be restricted in its entirety to fishing vessels for the duration of the survey. The rolling node area will only restrict access to a smaller section. FLOs will be placed on board Siddis Mariner and Sanco Sword to assist with fisheries on site.

Siddis Mariner: Call Sign LAIY3, IMO 9475181, captain@mariner.ohmeling.no, Tel +47 51 22 90 29

Sanco Sword: Call Sign ZDNE 7, IMO 9662100, Captain.sword@sanco.no, Tel +47 23 67 30 65

Tanux III: Call Sign V7MP4, IMO 9392406, Tanux3@uksnoy.no, Tel +87 07 73 23 14 41

The HAEVA Jackup Barge will undertake subsea well plug and abandonment (P&A) works and the removal of the Wellhead Protection Structure (WHPS) at the Durango subsea well. 

•       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.

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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.

Seismic Survey Notice – Ramform Hyperion

The seismic vessel Ramform Hyperion (call sign C6JE9) is conducting a 4D seismic survey on behalf of Vår Energy in the area around the Balder, Ringhorne, Jotun and Grane installations.Survey period: 31 July until approximately the end of September.Ramform Hyperion will be towing 10 seismic streamers.

Support vessels:

Thor Magni (call sign OZ2222)7-Stars (call sign HP6219)

Fishing vessels planning to operate in the area are kindly requested to contact the Fish-Rep on board Ramform Hyperion on VHF channel 16, or directly on the working channel 69.

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. In addition a crewed survey vessel will be engaged in the survey operations consisting of both Multibeam Echo Sounders and towed sidescan and magnetometer.  

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: It is expected that the survey activities shall extend for an additional 40 days from 31st July 2026. 

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.    

Please see attached Advance Notice for details.

Platform navigation aids may be offline and unavailable during this period.

All vessels operating in the vicinity of Buzzard Installation August/September 2026 are advised:1. Platform navigation aids (visual and audible) shall be considered to be OFFLINE and UNAVAILABLE for the duration stated above, with any works being initially preceded by Commencement notice and concluded by Completion Notice.2. Exercise increased vigilance when navigating near the installation, particularly at night or in poor visibility.3. Do not rely on visual or audible platform marking aids during this period.4. Maintain effective lookout using radar and all available navigation equipment.5. Comply with the 500m safety exclusion zone at all times.6. AIS remains available. The installation will continue to be shown on navigation charts.7. The installation remains operational throughout the works.8. Increased vessel activity may be present in the area due to concurrent works and platform operational activities.9. Nothing in this notice shall be interpreted as overriding the International Regulations for Preventing Collisions at Sea (COLREGs), which remain applicable at all times.10. The master of each vessel remains solely responsible for the safe navigation and operation of their vessel.

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.

Initial survey activities will be undertaken using the survey vessel EGS Echo, and will include:

Multibeam echosounder (MBES) survey; Side scan sonar (SSS); Magnetometer survey and UXO identification operations.

Bran Sands Survey Area is shown in Figure 1, with coordinates provided in Table 1 (WGS84 DDM).

Additional survey activities, including grab sampling and Drop Down Video (DDV), will be undertaken in the Bran Sands Wider Survey Area following these initial works. A new NtM will be issued ahead of the commencement of these works.

The EGS Echo will operate at low speeds and may have restricted manoeuvrability, while towing survey equipment. Survey operations are daytime only (~12hrs) and are estimated to take ~ 24-days (weather dependant).

Mariners are advised to always maintain a safe distance (of at least 500m) from the EGS Echo.

For further information, contact details for the Fishing Industry Representative and the Company Fisheries

The lost anchor is approximately 14 nm offshore from Spurn Head, River Humber at the following co-ordinate position:  53 33.05'N  00 30.66'E 

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

Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking pipeline installation activities as part of the NEP offshore pipeline construction programme.

The MH Freedom is expected to mobilise on or around 12 August 2026 to install the Dead Man Anchor (DMA) in preparation for the main offshore pipelay works.

The main offshore pipelay works will be undertaken by the Castorone, supported by 6 pipe supply and support vessels: FS Aries, Atlantica Server, Surfer Tide, MH Monsoon, FS Hercules, HM Flipper. The Normand Frontier will undertake associated pipeline burial activities. Two guard vessels, the Devotion and the Liberty will also be present within the project area.

Offshore Fisheries Liaison Officers (OFLOs) will be deployed aboard two of the pipe supply and support vessels to support communication with fishing vessels operating in the area.

The main offshore pipelay activities are anticipated to commence on or around 15 August 2026 and continue until approximately 30 November 2026, subject to weather conditions, operational requirements and programme changes.

The pipeline installation works will take place within Blocks 1-5, as shown in Figure 1 and detailed in Table 1.Mariners are requested to maintain a safe distance of at least 500 m from the vessels at all times and to navigate with caution when operating in the vicinity of the works.

For further information, contact details for the Fishing Industry Representative and Company Fisheries Liaison Officer are provided in Section 7.

The Deep Vision (Call sign 2CVC8) will be carrying annual pipeline inspection along various pipelines and structures West of Shetland,  in the Northern and Central North Sea.  The vessel will work north to south, starting at the Victory field then across to the Penguins field and completing north of the Fulmar platform.   The vessel will be performing non-intrusive ROV survey both dynamically along pipelines and sometimes stationary along small lines and structures.

Mariners are advised of the completion of marine activities in relation to the Orkney HVAC, Dounreay HDD works, located in the near-shore area off Dounreay. 

The completion of the works includes the installation of two subsea HDD ducts and supporting rock bags. Thess assets will facilitate the 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. Full details and coordinates are contained in attatched NTM.

DSV Seven Kestrel will be diving within the Triton FPSO 500m zone, i.e.  electrical diagnostics, plus also be diving within the Triton area, i.e. Guillemot DC3 Well TU Production and Gas Lift Chokes changeouts, Guillemot DC1 and DC6 electrical diagnostics and SCM change out at Evelyn field. Vessel could be in the area for 15 days depending on the weather.

Seismic OBN survey, with a shot carpet of 320km2, in and around the Culzean field. 3 vessel field crew, consisting of a node handling vessel (SW Tasman), source vessel (SW Gallien) and 1 support/guard vessel (Boreas-G). Estimated mobilisation date: 31st August for 50 days. 

This is to advise mariners that one of the Moray West Aids to Navigation (AtoN) is currently exhibiting an incorrect light characteristic. AtoN MW-D09 is presently displaying a yellow flash every 2 seconds, whereas the published characteristic is a yellow flash every 5 seconds.

Works are underway to rectify the issue at the earliest opportunity. Until repairs have been completed, mariners are requested to be aware of this discrepancy when navigating in the vicinity of MW-D09.

The primary objective of the MBES survey is to establish baseline seabed conditions and identify key features and hazards to inform the planning and targeting of a subsequent environmental survey to be undertaken by OEL. Data acquisition will support AECOM’s preparation of the EIA submission to the Office for Nuclear Regulation, ensuring that potential environmental sensitivities and seabed constraints are appropriately understood. The vessel will be restricted manoeuvrability during survey operations, an exclusion zone of 100 m is requested at all times. The works will be completed by personnel from Shoreline Surveys Limited onboard Shoreline which will mobilise from Dover Marina.

The survey will be carried out on a continuous daily basis, working 12-hours per day pending weather. Upon adverse weather conditions, if the Shoreline is not able to remain on site, it will seek shelter (likely inshore at St Mary’s Bay, Folkestone or Jurys Gap depending to the prevailing direction of the weather) or return to Dover Marina

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Type See detailed map on our bulletin website

Mariners are advised that Northumbrian Water Ltd will be deploying Acoustic Doppler Current Profilers (ADCP) within the Bran Sands survey area (see Figure 1 and Table 1 attached), these surveys are in support of the Bran Sands Long Sea Outfall (LSO) Project.

The deployment and recovery of the ADCPs will be undertaken by the survey vessel EGS Echo (Section 6) The planned positions of the ADCPs are illustrated below in Figure 1 and coordinates are provided in Table 2 (WGS84 DDM)  

The ADCPs will be mounted on a seabed frame and tethered via a 50m ground line to a clump weight. The seabed frames and clump weights will be recovered with auto retrieval acoustic release buoys.

Mariners are advised to always maintain a safe distance (of at least 500m) from the EGS Echo  

For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officers are provided in Section 7.

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Dredging support surveys will take place along the Liverpool Bay CCS Cable Construction Area (See Figure 1 and Table 1 in the attached notice) 

 The LB CCS Cable Construction corridor has been divided into seven separate blocks listed Blocks A-G to enable clear engagement and communications to all relevant stakeholders. 

These Blocks have been updated to accommodate additional cable lay works and now extend from Talacre Beach to Douglas Platform and an additional Temporary Anchor Zone.

Mariners are advised to always maintain a safe distance (of at least 500m) from all vessels at all times. 

 For further information, please contact the Company Fisheries Liaison Officers.

B15 redrill operations 

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 survey aims to obtain information on:a) Distribution, size composition and abundance of all fish species caught.b)    Age – length distribution of selected species.c)    Distribution of fish in relation to their environment.d)    Distribution of macrobenthos and anthropogenic debris.e)    Surface and bottom temperature and salinity data using ESM2 profiler/mini-CTD logger and Niskin Bottle.f)    Length weight & maturity information using individual fish measurements, in support of the EU Data Regulation.To achieve this the Cefas Endeavour will deploy the GOV and trawl for 30 minutes at 4 knots (travelling approx 2nm) at each prime station. The positions given are the fishing locations that we used in 2024, however these may be altered to another location within the ICES rectangle if neccesary.  Water sampling using the ESM2 profiler/mini-CTD logger and Niskin Bottle will occur twice each day.

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 17/07/2026. Initial cable lay has been completed as surface lay prior to further protection and stabilisation work being undertaken as detailed in Table 1. An update of the vessels and equipment present is available in Table 2 and Table 3. Please note that wet storage of the cable end at Ardmore Bay has been executed with the storage area indicated in Figure 6.

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

Type See detailed map on our bulletin website

Potential targets have been identified on the boundary of NEP Pipeline Construction Area Block 5 (see figure 1 and Table 1) The targets will be scouted for static fishing gear ahead of any works to avoid disrupting fishing activity in the area.  

The positions of any targets identified as potential Unexploded Ordinance (pUXO) will continue to be shared within a separate notice and posted as a hazard on the Kingfisher Bulletin Service.  

Mariners are advised to maintain a safe distance (of at least 500m) from the vessel at all times.

For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 7.

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. 

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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.

Spirit Energy is conducting IRM Survey activities in the East Irish Sea commencing on 13th August to 10th September 2026.  These dates are subject to change depending on operational requirements and weather constraints.

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.

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.

As part of the Water Industry Environment Programme (WINEP), Northumbrian Water Ltd has commissioned ABPmer to undertake a detailed monitoring programme of the key nutrients impacting the conservation status within the transitional and coastal (TraC) waters of the River Tweed and Farne Islands.  This monitoring programme will also inform National Chemical Investigations Program (CIP) and is intended as a means of gaining a better understanding of the occurrence, behaviour, and management of trace contaminants in the environment. This work is being undertaken to investigate, understand, quantify and develop options to reduce the impact of Northumbrian Waters activities on the environment.

As part of this programme, ABPmer will be deploying a current monitoring instrument at two locations offshore of Budle Bay and within approaches to River Tweed for a 35-day period. The deployment is planned to take place on approximately 25 July 2026 and will be recovered approximately 35 days later.

During deployment/recovery operations, the vessel Princess Royal will be on respective locations for an approximate 1-hour period. When stationary other vessels are requested to pass at a safe speed and distance. VHF Channels 16 and 12 (Port of Berwick) will be monitored throughout survey operations.

Mooring Details

The current monitoring instrument will be secured within a seabed frame which will protrude above the seabed by 0.5 m in water depths ranging between 25m (Budle Bay) and 7m (Tweed Approach) Chart Datum. The frame will be secured to a 500kg sinker weight by weighted groundline. From the weighted groundline will be a riser chain to a surface marker buoy, a yellow special mark exhibiting light characteristics Y.Fl(5)20s.

The dive operations for EGL 2 will mobilise on the 3rd of August 2026 with calibration operations expected to commence on the 6th August 2026. The works are to be conducted within the exclusion zone shown by Figure 1, and coordinates are detailed in Table 1, both given below. The works consist of Divers carrying out targeted archaeological investigations.

The work is estimated to take approximately 18 days, finishing on approximately the 23rd of August 2026, subject to weather and operational progress.

Three submerged passive acoustic monitoring (PAM) moorings (see Figure Mooring Design) were deployed by SAMS Enterprise in June 2025 within the boundary of the Southern Trench Marine Protected Area and will remain in situ for two years with a service interval every 5 – 6 months. The moorings will have no surface expression (i.e. no surface marker buoy) and the top of the mooring extends approximately 4-6m above the seabed. 

The first service visit of the three PAM moorings took place in October 2025 (18/10).

The second service visit took place May 2026 (09/05/2026). The works were executed from Fraserburgh Port by the vessel ARTEMIS (see Artemis Pic).

MARINERS ARE REMINDED to navigate with caution and keep continued watch on VHF Ch. 70 / 16 when navigating the area.

Equipment were re-deployed at the following location (WGS84) in May 2026 (09/05/2026):

The three PAM moorings were deployed within the Southern Trench MPA (see figure "AsLaid_May2026").

MARINE USERS are requested to maintain a safe clearance distance of 500m from all locations.

Vessel details:

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

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

These project vessels will be working 12- & 24-hour shifts at various days throughout and are expected to be in the field for until Mid-October 2026.

The LB CCS Cable Construction corridor has been divided into seven separate blocks listed Blocks A-G for these activities to enable clear engagement and communications to all relevant stakeholders.

These Blocks have been updated to accommodate additional cable lay preparation works which extend from Talacre Beach to Douglas Platform.

Pre- lay dredging activity is planned mainly within Blocks A – D 

Temporary Anchor deployments will be carried out along the Temporary Anchor Zone

Pre-Lay Dredging and Cable Lay Preparation works Areas & Temporary Anchor Zones are illustrated within the attached notice

Mariners are advised to always maintain a safe distance (of at least 500m) from all vessels at all times.

For further information, please contact the Company Fisheries Liaison Officers 

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.

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Ninian Southern Platform has now successfully down manned and has entered the idle phase. 

The idle plase Navaid system is operating satisfactorily.

Topsides removal is due to commence in Q2 2027, and the installation will remain in the idle phase until that time.

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. 

Type See detailed map on our bulletin website

Type See detailed map on our bulletin website

• Summary of survey activities, including:
• Side scan sonar towfish (up to 300 m astern).
• Surface-towed seismic streamer (approximately 100 m astern).
• Environmental sampling and drop-down video surveys.
• The vessel will be restricted in her ability to manoeuvre whilst survey equipment is deployed.

Type See detailed map on our bulletin website

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. 

The Jack-Up vessel “ZITON WIND ENERGY” is expected to arrive a Dudgeon wind farm on 28th July 2026. Four WTG locations are planned for major component changes:

The Jack-Up Vessel (JUV) is expected to be onsite for a minimum 28 days, possible extension may be required subject to weather during the period. So far as is reasonably practicable, mariners should give the JUV a wide berth.

Order of WTG attendance is weather dependent so please maintain awareness while in the vicinity of all four listed WTGs, throughout this period.

  The USV will operate from Wick for the full survey duration. One USV with hull mounted survey sensors(MultiBeam Echosounders) and a deployable ROV will be used to collect data. A crewd support vessel will be chartered throughout the survey to support the USV with departures and arrivals from Wick and assist in any emergency required.

Cable‑laying operations will continue to be conducted within the East Anglia THREE Offshore Windfarm byCLV Seaway Aimery and CLV Seaway Phoenix. The vessels will install subsea cables between WTGs andthe Offshore Converter Station (OFCS). The Grand Canyon III will conduct trenching and burial operationssupporting the Cable-Laying operation. During cable deployment, trenching & burial all vessels involved willbe restricted in their ability to manoeuvre.The Seaway Aimery and Seaway Phoenix will be supported by the Seaway Moxie & Windea Clausius, whichwill both undertake equipment and personnel transfers to WTGs and the OFCS via a Walk‑to‑Work (W2W)gangway system. While conducting these transfers, the Seaway Moxie & Windea Clausius will also berestricted in manoeuvrability.The Rix Lion will be the CTV support vessel providing 24hr support covering both cable installation and T&T

The transponder is not expected to create a significant hazard for other sea users, as the proposed area experiances low levels of shipping and fishing effort. However, based on a worst case, the transponder may sit a maximum of ~1 m above the seabed and could present a snagging risk. Please be aware of its presence. Given its distance to the coastline, no impacts to coastal landscape are expected.

The Hawksley WHPS usually has a Yellow special marker buoy (Wellhead EMB 28 Pillar Buoy) marking the structure - this has broken off-station so the WHPS does not currently have a surface marker in place. The top of the WHPS is -12m.

The buoy has been retrieved so is not a risk to other users of the sea.

The site survey will be carried out using two vessels:

• M/V “Amazon Conqueror
• M/V “Amber-G” 

The seismic will be acquired by M/V “Amazon Conqueror” using 4 sources of 200 cubic inches and towing 8 streamers of lengths 1200 meters. Vessel Phone: +47 56 99 97 00- VHF: Channel 16 – IMO: 9665487 Callsign: C6GJ4.

The other type of site survey data as Multibeam Echo Sounder & Side Scan Sonar and Sub-Boom profiler will be acquired by M/V “Amber-G” IMO: 9731274 Callsign V7A6297

The Geophysical Survey vessel and USVs will be utilising hull-mounted and towed geophysical surveyequipment which requires manoeuvring space. A non-geophysical support vessel for the USVs will also beutilised. The survey campaign is expected to take approximately 60 days to complete (between 26 July 2026and 30 November 2026), subject to weather and operational constraints. Although the USVs are uncrewed,they are remotely piloted throughout their 24-hour operation, sending real time images and situationalawareness data over satellite for monitoring. The situational awareness aids available are listed below.

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 operations will be conducted within fishing Blocks 4 and 5. 

Block 5 has been extended to accommodate dredge spoil and is now larger than first reported within v01 of this notice. 

The works will be undertaken by two vessels: the Hermod R and the Njord R.  

The Njord R mobilisation has estimated to commence ~ 20th July, for approximately 8 weeks (weather dependent). 

The Hermod R activities are anticipated to commence on 24th July, for approximately 11 weeks (weather dependent) 

For further information, contact the Fishing Industry Representative and the Company Fisheries Liaison Officer. Mariners are advised to always maintain a safe distance (of at least 500m) from the Njord R and the Hermod R. 

Geo Ocean III shall be conducting an Inspection Survey. The survey shall comprise:

- AUV visual and geophysical survey along PL1761

- GVI of the Schiehallion Pipeline End Manifold

Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre. 

The Jane EDT ROVSV will be completing inspection activities at various locations including GBA and J-Area in the Central North Sea.

Kingfisher note:

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

Your FishSAFE Information will be updated in the next release.

Kingfisher note:

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

Your FishSAFE Information will be updated in the next release.

Kingfisher note:

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

Your FishSAFE Information will be updated in the next release.

Kingfisher note:

This safety zone may have been replaced by a new zone, or other zones may exist in the vicinity.

Your FishSAFE Information will be updated in the next release.

4.—(1) The Offshore Installations (Safety Zones) (No. 7) Order 2007(a) is amended as follows. (2) In the Schedule (safety zones), omit the entry relating to

“Victoria Subsea Production Well (49/17-14), Block 49/17, Victoria Field”. (53 27.694'N 002 16.986'E)

Kingfisher note:

This safety zone may have been replaced by a new zone, or other zones may exist in the vicinity.

Your FishSAFE Information will be updated in the next release.

3.—(1) The Offshore Installations (Safety Zones) Order 1997(d) is amended as follows. (2) In Schedule 1 (safety zones), omit the entry relating to

“Thames Yare Wellhead". (53 02.649'N 002 34.371'E)

Kingfisher note:

This safety zone may have been replaced by a new zone, or other zones may exist in the vicinity.

Your FishSAFE Information will be updated in the next release.

3.—(1) The Offshore Installations (Safety Zones) Order 1997(d) is amended as follows. (2) In Schedule 1 (safety zones), omit the entry relating to

“Thames Bure Wellhead". (53 07.378'N 002 25.455'E)

The Sleipnir SSCV will be mobilising to the Solan field around the 8th June to complete topsides and upper jacket removal. Operations will take apporximately 30 days. The vessel will then travel to the Vats yard in Norway.

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.

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. 

Wave buoy 

Model: Sofar Spotter Buoy

Diameter: 0.43 m

Colour: yellow

LED light: 0.5s flash every 2.5s with a visibility of at least 1 nm.

Mooring buoy

Model: Sealite SL-MB-1000

Diameter: 1 m

Colour: yellow

Clump weight: 500 kg steel ballast with chain

Deployment date: 26/08/2025

Radius cone: ~120m  

Model: Datawell DWR Mk3 buoy

Diameter: 0.9 m

Colour: yellow

LED light: 5 flashes in 10 s 20 s repetition 360° around for 4 Nm distance

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.

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The 2026 Attic Oil Recovery (AOR) campaign at Brent Charlie will encompass an upfront access and survey campaign followed (as required / possible) by recovery of mobile attic oil and interphase material.

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. 

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As per the conditions detailed in Marine Licence ML/1266 please be advised that during the period 10th August to 21st August, CNR International (UK) Limited will be carrying out the following works, utilising a diving support vessel:-

Location – Ninian Central Subsea Isolation Valve Protection Structure

Co-ordinates - 60° 51' 22.5346'' N, 01° 28' 30.1888' E

Activity – Subsea Isolation Valve Actuator Removal x 2  

Vessel Name – Boka da Vinci

Drilling operations will be conducted over various subsea templates in the Rosebank field 

The rig will be operating on DP, there will be no moorings. 

Deepsea Atlantic call sign - 2CEV5.

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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.  

Please see the attached Notice to Mariners for full details

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.

Following well P&A activity, the wellhead at Seven Seas remains in-situ and will be removed at a later date.  The 500 m safety zone remains in place.

Following well P&A activity at Grove G5, the wellhead protection structure and wellhead remain in situ and will be removed at a later date.  The 500 m safety zone remains in place.

Planned deployment locations: within a 100m radius around the centre points:

Each current meter will be mounted in a frame on the seabed, connected via leaded groundline to an anchored surface buoy within approximately 100m of the instruments.

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. 

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.

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Install subsea PLR (Pig Launcher)

Connect downline from vessel into gas export PLEM

Gas Export Pipeline dewatering pig train installation

Deep Explorer

Pipeline / flowline dewatering activities

ROV survey support including “as installed” survey

Flowline tie-ins

WRB recovery

Deep Explorer

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.

Plug & Abandonment operations at Pelican - to be completed by the Noble Patriot, as detailed within WIA/1887 CL/1619.8 x anchors within radius of 61 2 2.70 North 01 7 45.67 East.  Rig expected to arrive on location 10th July 2026.

Line 1: Easting 561614, Northing 6768675 Line 2: Easting 561993, Northing 6767856 Line 3: Easting 562460, Northing 6766580 Line 4: Easting 561892, Northing 6765627 Line 5: Easting 560483, Northing 6765504 Line 6: Easting 559550, Northing 6766204 Line 7: Easting 559370, Northing 6767947 Line 8: Easting 560099, Northing 6768768

Pre-laying of anchor at Pelican - in preparation for Noble Patriot arrival, as detailed within WIA/1887 CL/1619.  8 x anchors to be placed within radius of 61 2 2.70 North 01 7 45.67 East.

Recovery of the anchor pickup grapple line from the seabed and attachment of surface buoys to commence prior to rig arrival on 10th July.

Line 1: Easting 561614, Northing 6768675 Line 2 [to be layed at time of rig arrival]: Easting 561993, Northing 6767856 Line 3: Easting 562460, Northing 6766580 Line 4: Easting 561892, Northing 6765627 Line 5: Easting 560483, Northing 6765504 Line 6: Easting 559550, Northing 6766204 Line 7: Easting 559370, Northing 6767947 Line 8: Easting 560099, Northing 6768768

Plug and abandonment operations at Cladhan - to be completed by Noble Patriot, as detailed within WIA/1885 CL/1588.Including 8 x anchors within radius of 61 08 53.92 North 00 47 13.62 East.

Geo Ocean III shall be conducting an environmental survey in the Foinaven Field. The survey shall comprise:

- AUV geophysical survey at approximately 3 knots using multibeam echosounder and sidescan sonar. This survey shall primarily cover the former DC 500m zones and pipeline/umbilical corridors in the field.

- Environmental survey, of up to 36 stations. At each station the vessel shall complete camera transects and grab samples. 

- ROV general visual inspection of Structures

Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre. 

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Freespan  Length = 71.04m, Height = 0.824m within Gryphon Cluster 500m safety zone.With 16 x Touchdown points noted along the length.

Seismic source to be deployed by crane from the Elgin platform, for a 1-well Vertical Seismic Profile (VSP) on the B5 well. All operations to occur within Elgin 500m zone.Estimated duration of acquisition is 12 hours, not including weather standby. 

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The mooring piles have been cut below seabed level and the cut sections recovered.

Risers, tie-in spools, manifolds and mid-water arches have been recovered from the seabed. The surface laid pipeline bundles that served the North and South drill centres remain in place until a decommissioning option is finalised. Wellheads remain in place protected by existing fishing protection structures.

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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

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).

The survey will cover an area of 3 x 3 km, where the bathymetry, Side Scan Sonar, Multi Beam Echo Sound and environmental scope of work (grab samples and video transects) will be carried out. 

The survey will cover 4 areas of 3 x 3 km where the bathymetry, Side Scan Sonar, Multi Beam, Echo Sound and environmental scope of work (grab samples and Video transects) will be carried out.

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ENI UK is currently in the process of Decommissioning of assets in Liverpool Bay as part of the end oil & gas production (Figure 2.1). There are two main projects running in parallel.

• Decommissioning of the platforms
• Plug & Abandonment of wells for the closure of the field
• Seismic Survey 6z IW Survey at Lennox
• A combined UXO desk study has been commissioned by ENI in 2025 which was completed by Fugro to assess the UXO risk for the different project phases, this incorporates historic
  survey data to understand the potential risk of UXO’s with depth and in many places in Liverpool Bay bedrock is at or very near the surface resulting in a potentially lower risk of UXO’s being present. This desk study has then informed dedicated risk assessments for decommissioning and P&A should be consulted for a more detailed understanding of the UXO’s potentially located in the area. 

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 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. 

Pre-laying of anchor at Falcon - in preparation for Noble Patriot arrival, as detailed within WIA/1885 CL/1588.8 x anchors to be placed within radius of 61 19 50.08 North 00 59 28.19 East.

Recovery of the anchor pickup grapple line from the seabed and attachment of surface buoys to commence prior to rig arrival on 25th June.

Plug and abandonment operations at Falcon - to be completed by Noble Patriot, as detailed within WIA/1886 CL/1597. Including 8 x anchors within radius of 61 19 50.08 North 00 59 28.19 East.  Rig arrival due to commence on 25th June 2026.

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.

Seismic survey to be completed around the Gannet D Field: The survey will cover an area of 5 x 5 km, where the bathymetry, 2DHR, Side Scan Sonar, Multi Beam, Echo Sound and environmental scope of work (grab samples and video transects) will be carried out.

The survey will cover an area of 5 x 5 km, pipeline route where the bathymetry,2DHR, Side Scan Sonar, Multi Beam Echo Sound and environmental scope of work (grab samples and video transects) will be carried out.

Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking outcrop crossing mattress installation, gate/marker installation, boulder relocation and associated pre-lay survey activities within the NEP pipeline construction area as part of the pre-lay pipeline construction programme.

The works will be undertaken by the EDT Hercules, which is currently scheduled to mobilise from Aberdeen on 25 June 2026, with arrival at the construction area anticipated on 27–28 June 2026, subject to weather conditions.

Initial activities will comprise mattress installation, gate/marker installation and boulder relocation works, which are expected to continue for approximately 45 days. Following completion of these activities, the vessel will undertake pre-lay survey and pipelay support activities within the construction area.

Offshore activities by the EDT Hercules are currently anticipated to continue until approximately 24 September 2026, although all dates remain subject to weather, operational requirements and programme changes.

An Offshore Fisheries Liaison Officer (OFLO) will be present onboard the EDT Hercules throughout the offshore campaign and will act as the primary point of contact between the vessel and the fishing industry.Mariners are advised to maintain a safe distance of at least 500 metres from the EDT Hercules at all times.

The operations will be conducted within Fishing Blocks 1–5. These locations are shown below in Figure 1 and Table 1.

For further information, contact details for the Fishing Industry Representative and Company Fisheries Liaison Officer are provided in Section 7.

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. 

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The University of St Andrews is undertaking a Passive Acoustic Monitoring study of bottlenose dolphins in the coastal waters of Tyne and Wear, Durham, and North and East Yorkshire. The RV Fortuna, operated by Ultra Marine Powerboat Services ltd, will be installing an array of four subsurface scientific moorings with FPOD & CPOD instruments (Chelonia ltd), with a provisional start date of 23rd June 2026, subject to suitable weather conditions. The locations of the four moorings are provided in the table below. Each mooring will remain in position for 12 months with a provisional end date of 30th June 2027. Upon recovery the entire mooring will be removed. Works will occur within daylight hours. Completion of the deployments is expected within 2 days.  The mooring will be serviced at 4-6 monthly intervals. Service visits are expected to be completed within two days. During operations RV Fortuna will be restricted in its ability to manoeuvre and will display appropriate day shapes and light in accordance with COLREGs, alongside transmitting its position on AIS.

Mooring Description A lightweight, seabed deployed subsurface acoustic-release mooring will be used with the FPOD/CPOD deployments. The vertical mooring is max. 5m in height above the seafloor. The equipment will comprise one 75 kg clump weight that will sit on the seabed with a maximum footprint of 0.25m2. Immediately above the clump weight a 1m section of rope will secure to the base of the Sonardyne acoustic release device. Above the acoustic release there will be an approx. 2m tall section of riser rope with the FPOD and CPOD devices in-line and trawl floats at the top of the riser rope.  

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

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The MBE survey will be carried out by M/V “Ocean  Geograph”. During the survey acquisition there will be no towed equipment, just the hull mounted MBE.  That means the vessel has full ability to manoeuvre apart from the areas where the Statfjord Platforms A, B, and C + the loading areas for Statfjord A & B.  

The survey area is approximately 140 – 150 meters depth apart from the Northern Part where it deepens to 240 meters.  The duration of the survey is estimated to 12 effective days + possible weather stand-by. The earliest survey start date is set to 19th June but much likely a few days later.

Callsign: C6JC4

Vessel Phones: +44 20 3695 1403 / 1404 / 1405 / 1410

VHF: Channel 16

IMO: 9267388

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

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It can be confirmed that these anchors are not associated with drilling activity that took place in field in 2023.  It is assumed that the anchors pre-date this campaign i.e. prior to 2023.

Note that Potential Anchor No. 3 has a broken tether attached.  The northern part (attached to anchor) measures approx. 125.1m and the northern part measures approx. 336.7m.  SSS Mosaics attached for reference.

The SFF have advised putting co-ordinates on Kingfisher.

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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 

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Skandi Africa call sign C6BU7

Will conduct the operations of the installation of the 5 flexible risers (/part flowline for 2 off) and 1 dynamic umbilical to the Rosebank FPSO when in location in the Rosebank field.

Surveys will be undertaken following the installation. As part of this scope there will also be flushing only with leak testing of the lines undertaken from the FPSO with subsea observations/interventions (as required) by a separate vessel.

Note: Scope will involve temporary installation aids (i.e. deployment and recovery of Sinking Clumpweights and turning bollards).

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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.

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Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from first of June to March 2027. Survey dates will be updated as the programme progresses.

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. 

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.  

Re-deployment of our offshore floating buoy with racks loaded with coated coupons. The buoy will be re-deployed at the earliest weather opportunity after the 26/01/2026. This is a one day task. The buoy will remain at the location shown until winter 2026.

The purpose of the buoy is to test and ascertain the effectiveness of various marine coatings in a harsh marine environment. The buoy is visited monthly to sample the coated coupons and inspections are carried out to ensure the buoy is safe to remain on station.

The buoy will be lowered into the water at Shorestore Marina and towed by the Plymouth Quest vessel to the deployment area shown in the map. The vessel will then lower the anchor to a depth of 50m to the seabed and attach the chain link to the buoy to reduce disturbance. The buoy has a mooring system comprising of a 0.8 tonne (T) pivoting anchor and 100m of 50 millimetre (mm) chain. The anchor chain is connected to a 12m bridle consisting of 50mm heavy chain using a shackle rated to 12T.

The Acoustic Spatial Capture- Re-Capture (ASCR) Array has now been redeployed.  

 The planned deployment the Seabed Landers has been delayed estimated to take place ~ August – September 2026.   

 Seabed moorings and Cardinal buoys remained in their original positions after servicing.  

 All moorings will remain in place throughout the remaining ~5-month monitoring period. 

 As-Laid coordinates of all equipment are provided in Table 1, Table 2 and Table 3 and are illustrated in Figures 1 and 2 within the attached notice.  

 Mariners are advised to maintain a safe distance from the deployment locations at all times.

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

The CSV Oceanic will be carrying out the first stage of work within the North Cormorant 500m Zone, and I’d like to highlight that there is a dedicated ERRV in place to support the entire workscope. Once these preparation activities are completed, the Pioneering Spirit will attend to remove the topside as planned.

Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from 14th of May to June 2027. Survey dates will be updated as the programme progresses.

The Autonomous Underwater Vehicle will be deployed near shore and will navigate inside the study area (see attachment) for a period of 2-4 months. Every 2-4 months the AUV will be recovered and replaced with a new AUV that will again navigate the study area. This routine will continue for a year.

The Petrojarl Rosebank FPSO will arrive on station at the Rosebank Field at the earliest on the 25th of May 2026 for hook up and commissioning ready for full production at the end of 2026.

In preparation for the installation of a floating Wind Turbine at Culzean - an acoustic device will be deployed near to the proposed wind turbine location at the Culzean field.  The acoustic device will be at the location noted below - but will extend to a total height of 25m above the seabed. The device will deployed from 19th April 2026 (depending on weather) and will be in place for approx. six months.  

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. 

Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from first of May to March 2027. Survey dates will be updated as the programme progresses.

Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from first of May to March 2027. Survey dates will be updated as the programme progresses.

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.

Northern Gale, Northern Remote and Northern Breeze will, at different times, perfom hull-mounted MBES surveys to update nautical charts from first of April to March 2027. 

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The HLVs will be moblising to the Hewett feild in on or around the 1st of April. The HLVs will be completing preparation activites, and lifting and removing the topsides and jackets in the period April to August 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.

Marine survey operations will be carried out within the defined survey area between Hythe and Winchelsea from mid March 2026 to the end of August 2026. The works will consist of multibeam echo sounder (MBES) survey operations and limited seabed sampling at selected locations within the survey extent.

Survey activities will be undertaken by Northern Gale and Northern Breeze. One or both vessels may be restricted in their ability to manoeuvre while conducting survey lines and while sampling operations are in progress. Mariners are requested to navigate with caution in the vicinity of the survey vessels, maintain a safe passing distance, and keep a good lookout at all times.

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.

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 

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As part of its Water Resource Management Plan for the period 2025 to 2050 (WRMP24), Anglian Water Services has investigated and developed alternative water supply options which includes the abstraction and desalination of seawater. In service of this effort, Atkins-Realis, on behalf of Anglian Water, is coordinating the deployment of a water data buoy to collect water quality data off Lincolnshire at Mablethorpe, and off Norfolk at Bacton for a period of twelve months, commencing on 17/08/2025. The intention is to rotate the buoy between the sampling locations at three-month intervals. The equipment deployed will include a  floating NexSens CB-450 Data Buoy secured by a seabed mooring system. 

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.

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