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The OBN survey at Martin Linge will be carried out by the vessels REM Trader, Sanco Star, Esvagt Castor and Stålbas.

REM Trader will lay nodes on the seabed around the Martin Linge platform and Martin Linge FSO. The nodes are organised in a series of 27 lines in the NE-SW direction. On each line, there will be a node every 25m. Nodes lines are 400m apart.

When deploying the nodes, REM Trader will be very restricted in her manoeuvrability. She will have nodes, ropes and weights being deployed from her stern at a speed of 0.5-2 knots.

After nodes have been deployed Sanco Star will then deploy 2 seismic sources and fire shot points every 25m over the whole area at an average speed of 4.5 knots. Shot points are also fired along straight lines in the NE-SW direction. The source lines will be 100m apart. The towed equipment behind Sanco Star when acting as source vessel will measure approximately 200m x 100m (LxW).

Esvagt Castor and Stålbas will act as support and escort vessels for REM Trader and Sanco Star during the survey.

REM Trader: Call Sign 5BGQ5 - IMO 9529932 – captain@trader.remoffshore.no - +47 23 67 27 72

Sanco Star: Call Sign ZDIT8 – IMO 9410313 – captain.star@sanco.no - +47 23 67 85 50

Esvagt Castor: Call Sign OUKI2 – IMO 9508756 – castor@esvagtvessel.com - +45 61 62 67 74

Stålbas: Call Sign 5077682 – IMO LNXH – stalbas.bridge@besi.no - +47 90 68 88 37

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.  

The Unexploded Ordinance (UXO) Investigation will be carried out in the Eastern Irish Sea to identify potential UXO targets (pUXO) along the Liverpool Bay CCS Cable Construction Area 

The UXO corridor has been divided into ten separate Blocks listed Blocks A-J to enable clear engagement and communications to all relevant stakeholders.

Blocks A – J coordinates can be found in Table 1 of the attached notice  

The Titan Discovery will work within Blocks A- D nearshore, the Argyll Explorer will work initially in Blocks A-D and then Blocks I-J, the Ocean Geograph will work Blocks D-J offshore.    

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

The vessels are estimated to be on location for ~14 days (weather dependant) completing works by ~28th April, working 24 hours a day. 

Mariners are advised to always maintain a safe distance (of at least 500m) from the Argyll Explorer, Titan Discovery & Ocean Geograph.   

For further information, contact details for the Company Fisheries Liaison Officers are provided in Section 7 of the attached notice. 

Irish Sea Pioneer is moving from lennox Platform to Camell lairds (Birkenhead). Rigs are protected by a 500m safety zone.

Survey vessel Skandi Iceman will survey at the FPSO moored position all wet stored anchors and mooring chains prior to the FPSO arrival and subsequent hook up. These anchors are within the Rosebank development area.

All vessels are requested to give the "Skandi Iceman" a wide berth as vessel will be operating within a radius of 2.0 nm of this given position. 

Please be advised that between the 16th of April 2026 and 23rd April 2026, there will be a vessel (Deep - Vision) present within a 500-metre radius of the Ninian Southern Platform at the following location to carry out the following activity:-

Assist with the removal of a 12.2 metre section of well conductor from the confides of the Ninian Southern Jacket (at the -43m level) and subsequent controlled laydown onto the seabed of said section, within the boundaries of the jacket structure.

Biological sampling will be preceded by geophysical investigations to select appropriate ground conditions for sampling. 

An NFFO Offshore Fisheries Liaison Officer (OFLO) will be onboard the Ocean Observer. Survey activities will be planned and work around static fishing gear to avoid disruption.    

The vessel is estimated to arrive on location ~21st April working 24 hours a day for ~ 58 days. 

Mariners are advised to politely maintain a safe distance (of at least 500m) from the Ocean Observer.

For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided in Section 6 of the attached notice. 

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Survey will comprise:SSS/MBES of well areas,drop camera/video,grab sampling for chemical and faunal analyses

Ithaca is planning to conduct a bathymetry, debris clearance, habitat assessment and environment baseline survey in the Captain Field (over Areas B & C). The scope of the survey work will involve collection of SSS, SBES, MBES and  passive magnetometer data. Video and stills photography will be undertaken at a number of environmental stations followed by grab samples.

Wellhead protection structure at Seven Seas now removed and recovered to surface. Well subsea infrastructure still in place. Well-Safe Protector mobilising 15th April 2026 from Aberdeen to complete full well P&A. This date is subject to change depending on weather and operational requirements.  500 m safety zone remains in place.

Grove G5 Xmas tree and Wellhead protection structure remain in place with Wellhead Protection Structure Top Canopy removed. 500 m safety zone remains in place. Well-Safe Protector is expected to be on location around mid May 2026 to complete full well P&A.  This date is subject to change depending on weather and operational requirements.

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.

Vessel to be on location for approx five (5) days.

No streamers to be towed for this survey.

Vessel to be on location for approx eight (8) days.

No streamers to be towed for this survey.

Vessel to be on location for approx five (5) days.

No streamers to be towed for this survey.

Statfjord intrafield survey using ROV from the vessel Edda Flora in water depths of approximately 70-150m. No towed equipment in use.

Vessel: Edda Flora

IMO/MMSI: 9386380/258245000

Call Sign: LAJW3

Vessel now on location.

Survey works to last 14 - 21 days.

A single solid streamer of approximately 1,350 m in length will be towed behind the survey vessel during the 2DHR seismic operations.

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The proposed scope of work includes downhole flushing (no discharges to sea) of XT pipework and jumpers, disconnection of XTs, and performing barrier testing on isolation valves at each XT. 

In addition, PL870B (Water Injection Pipeline to Strathspey) will be disconnected at the SMS.

This is in preparation to support the final decommissioning at a later date.  

Location – 60 55 37.04 North, 01 42 18.26 East

The activities will be carried out in the Eastern Irish along the Liverpool Bay CCS Cable Construction Area (See Figure 1 and Table 1 in the attached notice)  

 The construction area has been divided into ten separate Blocks listed Blocks A-J to enable clear engagement and communications to all relevant stakeholders (Blocks A – J coordinates can be found in Table 1 in the attached notice) 

Pre-Lay Trenching activities will take place within Blocks A, and D-G only.

The works include use of a Remotely Operated Vehicle (ROV) and a Subsea Cable Trencher which will be deployed at the rear of the vessel. The vessel will have restricted manoeuvrability and speed while the equipment is deployed.  

 Mariners are advised to always maintain a safe distance (of at least 600m) from the Ndeavor at all times. 

 The vessel is estimated to arrive on location ~ 17th April working 24 hours a day for ~ 21 days. 

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

The activities will be carried out in the Eastern Irish along the Liverpool Bay CCS Cable Construction Area (See Figure 1 and Table 1 in the attached notice) 

The construction area has been divided into ten separate Blocks listed Blocks A-J to enable clear engagement and communications to all relevant stakeholders.

Boulder relocation activities will take place within Blocks A –J with boulders being replaced ~ +6.5m from their original position.  

Mattress lay will take place within Blocks C – F. The as-laid positions of mattresses will be shared on the Kingfisher Bulletin Service once finalised.      

The vessel is estimated to arrive on location ~ 10th April working 24 hours a day for ~ 16 days. 

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

For further information, contact details for the Company Fisheries Liaison Officers are provided.

Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking a nearshore Unexploded Ordnance (UXO) investigation survey in the southern North Sea, utilising divers. The survey will be conducted by the vessel DSV Curtis Marshall (see section 6)

The scope will include targeted investigation of potential UXO targets within NEP Pipeline and Cable Construction Area Block 1 (see Figure 1 and Table 1 below) in water depths of ≤10 m. Where required, clearance activities will be undertaken. Clearance methods may include deflagration (low-order disarming), and the relocation of debris away from the pipeline route and associated exclusion zone. In addition, the vessel will undertake nearshore sediment sampling within the same work area. Relevant permissions in place are provided in Section 2.

The vessel is estimated to arrive on location on ~3rd April 2026.The investigation is expected to take ~14 days to complete (weather dependant). Mariners are advised to maintain a safe distance (of at least 500m) from the survey vessel locations at all times.

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

Survey carried out by the vessel “MV Ocean Reliance”

The MV Ocean Reliance will acquire a standard site survey over the given area. The vessel will during its acquisition-period tow two streamers of 1200 m length in N-S and in E-W direction.

During the survey period the vessel will also perform Cone Penetrations tests (CPT’s) for geotechnical measurements of the seabed.

During the seismic acquisition period and during the CPT measurements the vessel will have restricted manoeuvrability.

MV Ocean Reliance will be the only operating vessel, no support or guard vessel will be active:

MV Ocean Reliance:

Call Sign HP6391 - IMO 8616609

opm@reliance.gardline.com

+44 (0) 2038 682 090

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A78-02 shall be conducting ROV based geophysical surveys at approximately 1.5 knots using multibeam echosounder and sidescan sonar. The survey shall also comprise an environmental survey, of up to 12 stations. At each station the vessel shall complete ROV video transects and grab samples  

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

The Titan Endeavour will be conducting MBES, sidescan sonar and magnetometer surveys along the intedned route. Environmental day grab and camera operations will be conducted at 1km intervals along the route.

Perenco are planning to undertake modifications to the topsides and install a conductor at Hoton utilising the HAEVA Jack-Up Barge (JUB). The HAEVA JUB will be positioned at Hoton, interfacing with the platform from the 5th April at the earliest (weather dependent). The Project is expected to last for a duration of 50 days. The HAEVA JUB occupies a much larger footprint that the Hoton installation, therefore, whilst the HAEVA JUB is on location, the HAEVA JUB Aids to Navigation (AtN) will be the sole AtNs for the duration of deployment and the Hoton platform will be blacked out. The positioning of the HAEVA JUB will require four mooring anchors which will be positioned at the following locations (ED50 UTM Grid Zone 31):

•    Starboard Bow: E 382 609, N 5 963 278•    Starboard Aft: E 382 056, N 5 962 750•    Port Aft: E 381 446, N 5 963 440•    Port Bow: E 382 038, N 5 963 924

Location Coordinates (WGS 1984):

Hoton: Latitude (WGS84):  53° 48' 10.0" N, Longitude (WGS84):  01° 12' 22.6" E HAEVA Working Position: 53° 48' 13.106" N, 001° 12' 28.308" E

A survey will be performed with survey vessel Miranda. 

The survey will be performed at the following locations:

• Wingate NUI platform
• Route from the Wingate NUI platform up to the D15-FA-1 platform
• A6-1
• A6-2
• L6-B1
• D12-B
• D12-3

Each location we need to survey a 500x500 meter box from the centre location (positions given in the activity location)

The survey will also include towing of survey equipment and a grab sampling campaign near the Wingate NUI platform.

The activity will take place within Blocks A – G, Welsh Channel to Douglas (see block coordinates in Table 1 in the attached notice) along the Liverpool Bay CCS Cable Survey Blocks (See Figure 1 in the attached notice)  

The corridor has been divided into ten separate Blocks listed Blocks A-J to enable clear engagement and communications to all relevant stakeholders. 

 This activity will take place within the Welsh Waters only Blocks A – G     

 The Voe Vanguard is estimated to arrive on location ~7th April working 24 hours a day for ~ 12 days. 

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

 For further information, contact details for the Company Fisheries Liaison Officers are provided in Section in this notice 

The Well-Safe Protector will mobilise from Aberdeen to the Seven Seas (48/7c-13y) location to undertake P&A activities, on or around the 15th April 2026.  Operations are expected to take a total of 40 days and to be complete by the end of May 2026.  Following this activity, the rig will move to Grove G5 (49/10a-4) location to undertake P&A activities. It is expected to be at Grove G5 for 30 days.  All activities are expected to be complete by the end of July 2026. This date is subject to change depending on weather and operational requirements.

Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking a nearshore dredging and dredge area maintenance campaign in the southern North Sea, utilising seven vessels. These vessels will be mobilising from the port of Hartlepool and working 24hrs a day.

The scope will include removal and temporary storage of dredge material within the NEP Pipeline and Cable Construction Area Block 1. Relevant permissions in place are provided in Section 2

The vessels are estimated to arrive on location on ~27 March 2026. Initial dredging activity is expected to take 71 ~ days to complete (weather dependant) and continued monitoring and maintenance of the dredge area will continue until pipelay activities begin. Updates will be issued via regular NEP Notice of Operations during the activity.

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

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

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

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Activities to be Undertaken during the Campaign

Arthur - Remedial Cutting at former wellheads, former manifold and umbilical

Gawain E&A Well 49/29a-7 - Backfill over mattress

Leman 27 J - PL206 & PL207 Subsea Cutting

Inde 18A - PL76 Remedial Cutting & Inde 18 A Debris Removal

Davy North & East - Remedial Cutting & Debris Removal

Ravenspurn North Gas Compression Deck concrete base gravity structure - Structure inspection

Amethyst A1D - Rig Pre Work

Trent - Jacket Inspection

Durango - General Visual Inspection

Wenlock - Subsea cutting & Rig Pre Work

Garrow - Subsea cutting & Rig Pre Work

Kilmar - Subsea cutting & Rig Pre Work

Decommissioning P&A Pre Works will be conducted at Leman Southwest in the Southern North Sea. The campaign has started in March but the visibility at the location has been poor. The MSV will continue to attend the location in order to carry out the pre work.

The proposed pre works will utilise the Wagenborg Kingsborg to clean and prepare the well in advance of the P&A activity expected in Q2 2026.

This notice is issued as a follow on to the active notice "Weather Buoy Installation – Rosebank Offshore Development Area" 

The vessel Deep Explorer will mobilise to the previously installed weather buoy location in order to recover the buoy, which has been weather damaged.Once recovered a replacement meteorological buoy will be deployed at a new location, as detailed below:

New Buoy Deployment Position:Latitude: 60° 00'.45.84" N Longitude: 003° 49'.27.89" W

All vessels are requested to maintain a safe distance from the Deep Explorer during recovery operations and from the replacement buoy once deployed.Once operations are complete, the original notice "Weather Buoy Installation – Rosebank Offshore Development Area" will be updated to reflect the new buoy position.

Pressure testing of newly installed gas export pipeline

Connect downline from vessel into gas export PLEM and pressure test with filtered dyed seawater

Mariners are hereby advised that the Northern Endurance Partnership (NEP) is continuing to undertake an Offshore Passive Acoustic Monitoring (PAM) Survey within the Southern North Sea. This survey deployed of a series of PAM moorings to support ongoing environmental monitoring activities. 

Servicing of the equipment will be carried out by the BB Ocean estimated to take place on the 30th March 2026.  

Seabed moorings and Cardinal buoys remained in their original positions during servicing. Current positions of equipment are provided below in Tables 1 and Figure 1 and 2 in the attached notice. As -Laid positions will be provided post servicing.  

The 11 PAM recording stations at the fixed locations (via moorings anchored to seabed) will be serviced and replaced to original their positions. All moorings will remain in place throughout the remaining ~6-month monitoring period. 

Equipment details are as follows: 

• 1 x Acoustic Spatial Capture – Re-Capture (ASCR) Array: 7 x moorings deployed in a closely spaced configuration (~50 m separation between ARUs) 

• 2 x Localisation Arrays: 2 x seabed landers, within the ASCR array 

• 3 x Standalone Devices: 3 x moorings, distributed across the survey area for wider spatial coverage 

• 4 x cardinal marker buoys 

Coordinates are provided in Table 1 and are illustrated in Figures 1 and 2 below. Mariners are advised to maintain a safe distance from the deployment locations at all times. 

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

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. 

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Vessel has undertaken some of the works, and ha snow left location, with view to returning at later date.

Survey works to last 14 - 21 days.

A single solid streamer of approximately 1,350 m in length will be towed behind the survey vessel during the 2DHR seismic operations.

For A4, this involves disconnecting the well from the Gas Injection / Lift system at the MDS manifold, and tying the well back to the production system, teeing into the A14/A6 production system (PL4863) at the MDS.  6” rigid spools shall be installed and leak tested. For A2y, this involves disconnecting the well from the Gas Injection / Lift system, and tying the well back to the production system, teeing into the A12/A1 production system (PL4004) at the A12 T-piece. 6” rigid spools shall be installed and leak tested. Gas Lift supply is to be maintained by connecting together the 2.5-inch (PL2858) and 6-inch (PL4813) flexibles (previously disconnected from A2y) using a 1.5m long, 6”x2.5” reducing spool. These flanged connections shall be leak tested.

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The Odfjell Drilling operated Deepsea Atlantic mobile offshore drilling rig will be conducting drilling and well operations in the Rosebank field development area over various subsea templates for a period of approximately 18 months. 

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

Deepsea Atlantic call sign is 2CEV5. 

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The Harris and Barra fields and located in Block 201/24a of the UKCS, 160km to the East of Shetland and apprcximately 500km North- North East of Aberdeen. The water depth in the area varies from approximatety 150msw to 165msw. The Western Isles production storage and offshore vessel (FPSO) has been been disconnected and no longer in the area. The Well Enhancer will be working on Wells at the North and South Drill Centres with ROV support, plus possible diving operations if required. There will be SIMOPS with the CSV Boka Nothern Ocean that will be in the Dana Western Isles area carryout decommissioning operations with ROV only support.

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The mooring piles will be cut below seabed level and the cut sections recovered.

Risers, tie-in spools, manifolds and mid-water arches will be recovered from the seabed. The surface laid pipeline bundles serving the North and South drill centres will remain in place until a decommissioning option is finalised. Wellheads will be left in place with existing fishing protection structures subject to a separate well plug and abandonment campaign, which will commence in 2026.

New rock armour will be deposited to protect exposed pipeline bundle ends at the North and South Drill Centre and North and South Riser Base locations.

Work will re-commence from 15th March 2026.

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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

Survey works to last 14 - 21 days.

A single solid streamer of approximately 1,350 m in length will be towed behind the survey vessel during the 2DHR seismic operations.

TAQA (duty holder) will be conducting decommissioning activities at the East Brae installation commencing between the 12th of May 2026 and 11th June 2026 for circa 60 days. This work will include preparation works for Topside and Conductor removals.

Vessels will be operating within the 500m safety zone of the platform and on occasion, will be at stand-by, near to the boundary of the 500m zone.

Vessels in attendance will be the Balder and Sleipner for the work scopes.

The ERRV Vos Traveller will be performing standby duties.

Activity 1: An Unexploded Ordinance (UXO) Investigation survey utilising an ROV (Remote-Operated Vehicles) 

The survey will carry out targeted investigations of potential UXO targets (pUXO) within NEP Pipeline and Cable Construction Area Blocks 1 to 5 (See Figure 1 and Table 1 in the attached notice) >10m water depth.  

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

The vessel is estimated to arrive on location ~27 February working 24 hours a day for ~ 45 days. 

 Activity 2: Once the UXO identification campaign is completed the Olympic Taurus will begin a targeted Boulder Re-location campaign > 10m water depth within NEP Pipeline and Cable Construction Area Blocks 1 to 5. An update to this notice will be provided once this activity is schedule to begin along with any re-defined boulder re-location activity area coordinates.  

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

 The position and extent of the NEP Pipeline and Cable Construction Area Blocks (See Figure 1 and Table 1 in the attached notice) are currently under review and will be updated once the review is complete. 

For further information, contact details for the Fishing Industry Representative and the Company Fisheries Liaison Officer are provided within this bulletin. 

Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking an offshore Unexploded Ordinance (UXO) Investigation survey utilising ROV (Remote-Operated Vehicles) within the southern North Sea. The survey will be conducted by the vessel Glomar Wave (see section 6 of the attached notice) 

 The survey will carry out targeted investigations of potential UXO targets and conduct clearance of the targets if required within NEP Pipeline and Cable Construction Area Blocks 1 to 5 (See Figure 1 and Table 1 within the attached notice) >10m water depth. The position and extent of the NEP Pipeline and Cable Construction Area Blocks are currently under review and will be updated once the review is complete.   

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

 The vessel is estimated to arrive on location on the 1st March, working 24 hours a day. The investigation is expected to take ~ 60 days to complete (weather dependant)  

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

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

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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 zoneEstimated duration of acquisition is 12 hours, not including weather standby. 

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Harris and Barra fields are located in Block 201/24a of the UKCS, 160km to the East of Shetland, and apprcximately 500km North-North East of Aberdeen. The water depth in the area varies from approximately 150m to 165m. The Western Isles production storage and offshore vessel (FPSO) has been disconnected and offstation, but production trees and water injections trees via 9-off flexible risers, 2 -off dynamic umbilical's, 2 -off bundle systems with associated spools and jumpers, 2- off mid-water arches (MWA), FPSO mooring piles, concrete mattressess remain on location. Boka Northern Ocean will carryout some of the decommissioning works commencising in early April for up to 90 days on location, note only ROV's operations from the CSV Boka Northern Ocean for this part of the project.

The Swift 10 will arrive arround January 27th to Plug and Abandon the wells and pull the conductors on the Sean Papa manned platform.  The platform and rig will work in combined operation.The process will involve the MODU being towed to location, it will be  positioned temporarily at stand-off position then anchors will be run to move MODU into final position.

The Swift 10 is a MSC SEA-2750 self-elevating unit .  Aids to Navigation are listed as:- AIS, DSC MF/HF, VHF System, ER VHF Portable and RT/DSC, EPIRB,GPS/DGPS, Inmarsat C/ECG, GMDSS PRINTER, VSAT, LRIT, NAVTEX, SART, SSAS

The Rig Move procedure is in conjunction with the Marine Operations manual.  Required rig move notifications will be made prior to the move. 

The navigation lights on the Swift 10 are not able to be synchronised with the Sean PP. Navigation lights for both the Swift 10 and Sean Papa platform will remain turned on.

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UKCS Block ID: 211/13a and 211/14a 

Water Depths refer to Lowest Astronomical Tide (LAT) with all depths quoted in metres. 

No visible marker (marker buoys) will be deployed. 

Schematic drawing has been attached.

The cut-point of PL24 is exposed and is protruding significantly from the seabed; approximately 6m from the seabed at its highest point and overhanging approximately 18m long from where the line makes contact with the seabed again. This creates an increased risk of snagging of trawling equipment, or similar, compared to a regular freespan.

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Continuation of Jackdaw Installation 2025/2026

New SSIV, tie-in spools and associated protection will be installed in the Jackdaw 500m zone between the Jackdaw Wellhead Platform and the new pipeline which was installed in 2024.

Sleipnir with associated barge and tugs working in and around the Jackdaw 500m safety zone. 

New electro-hydraulic umbilical and associated protection will be installed between Jackdaw Wellhead Platform and New Jackdaw SSIV.  Cooling Loop may be cleaned if required.

Sat 1st of November 2025 - The Deep Arctic vessel will carry out 4 hours of DP trials.

See detailed map on our bulletin website

14 off Marine riser sections remain on the seabed at the location identified on the attached layout drawing. Their positioning has been secured utilising a combination of methods involving the following deployed equipment:

• 24 off gabion bags (2 te each),
• 24 off (6m x 3m mattresses),
• 14 off horizontal nets and 
• 1 off clump weight.

Plans are underway to retrieve all items during a single campaign scheduled for 2026 following which this notice will be retracted/updated to confirm full removal.

The Marine Riser was cut up, relocated and subsequently stabilised via a Marine Licence (ML/1100) issued by OPRED.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

An 8 inch oil production flowline will be installed (trenched and buired) from the exisiting GEEBB manifold (at Triton FPSO) to the new Belinda Valve skid located approx 5km south east of Triton. A 3 inch gas pipelines (piggy backed with the 8 inch) will also be was installed the same trence. 

A servise umbilical will be installed from the existing Evelyn valve skid to the Belinda valve skid located 7km north east of Evelyn. 

The works shall comprise the installtion of the following subsea pipeline or cable, or system of subsewa pipelines and cables:

- Bittern WI pipeline replacment and tie in spool

Dana intend to reinstate water injection at the Bittern field through installation of a new 12” water injection pipeline between the Triton FPSO and Bittern WA and WB XTs. The pipeline will be deployed by way of a pipelay vessel and laid on the seabed. The pipeline will subsequently be trenched and buried using a jet trencher. The pipeline will be accompanied by a number of jumpers and spools to tie-in to the water injection system. Rock placement, grout bags and mattresses may be required over the length of the pipeline.

As part of the system, they intend to install a 33.3 m tie-in spool connecting the new water injection pipeline (PL6609) to the WB XT. A combination of grout bags and concrete mattresses will be used to protect the pipeline.

The Works shall be located at: 57 04' 58.69" N, 00 53' 20.47" E Block 21/30.

The structure will be loaded onto the installation vessel in Peterhead and seafastened before undertaking the short transit to the field. Upon arrival, the seabed will be prepared by the temporary installation of transponder beacons to allow accurate positioning. The ship's crane will pick up the structure and overboard it clear of any subsea assets. The vessel will then step into the desired location and lower the structure to the seabed. The ship's ROV will disconnect installation rigging and recover all transponders and a structure based gyro.

As the structure is required to be located within the FPSO swing circle, heading control will be arranged for the FPSO to maintain a safe clearance between the FPSO and construction vessel. Once installed no further navigation aids are required.

See detailed map on our bulletin website