News

The Ocean Infinity vessel Armada 78-04 (Call Sign: 9V8530) will be carrying Pipeline Inspection Operations between / along the locations noted below:

The DSV Boka Topaz is due to mobilise to execute the Decommissioning scopes at B Block within the Central North Sea. The vessel will be working at B-Block 500m safety zones. Upon completion of the offshore campaign, the vessel will demobilise in Aberdeen. 

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)

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

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

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

•            SSIV

•            Mooring buoys

In order to gain access to the pipeline ends, a dredger will be employed to gain access to the ends for cutting.  Two 20” tie-in spools of PL310 (41 m section at the Sean Romeo end and 50 m section at the Sean Papa end), three 30” tie-in spools (two 10 m sections at the SSIV end and one 65 m at the Sean Papa end) will then be cut and recovered.  The pipeline spools will be recovered to the vessel deck in 10 m sections.   Once recovered, the remaining pipeline ends will be remediated with two tonne rock bags. 

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 four (4) days.

No streamers to be towed for this survey.

Vessel to be on location for approx four (4) days.

No streamers to be towed for this survey.

See detailed map on our bulletin website

See detailed map on our bulletin website

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 17thApril 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.

Skandi Vega / Skandi Iceman & Skandi Skansen will conduct operations to hook-up 12 x mooring chains to the Rosebank FPSO when in location in the Rosebank field.

This will include tensioning of the mooring chains to establish 100 year storm safe.

Following this the excess mooring chain will be cut and recovered to deck.

Survey activities is a part of this scope.

Part of this scope will be to recover blast matts & turning bollards.

Once 100 year storm safe is established the Skandi Vega & Skandi Iceman will leave the field, however Skandi Skansen will remain until scope complete.

The Unexploded Ordinance (UXO) investigation will continue in the Eastern Irish Sea to identify potential UXO targets (pUXO) along the Liverpool Bay CCS Cable Construction Area (See Figure 1 and Table 1 within the attached notice)  

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 Below  

The Titan Discovery will predominantly work within Blocks I-J, the Argyll Explorer will concentrate work in Blocks A-D and later I-J. 

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 Titan Discovery is estimated to be on location for a further 14 days (weather dependant) and the Argyl Explorer is estimated to be on location for a further 21 days (weather dependant)  

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

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

Maintenance of the Navigational Aids (Cardinal Buoys) at the Banff and Kyle Field

The AHTS vessels:

Normand Prosper / Normand Sapphire / Skandi Minder / Skandi Saltfjord

are conducting the tow from Bergen, Norway of the Rosebank FPSO to the Rosebank Oilfield.

Once on location at the Rosebank field, all 4 vessels will conduct station keeping until the mooring chain hook-up is complete.

Details of AHTS conducting the hook up of anchors can be found in the Notice Titled - Hook-up and tensioning of Rosebank FPSO moorings

Perenco UK Limited is carrying out a pipeline disconnection (PL3731 & PLU3732) campaign using the Wagenborg Kingsborg The Kingsborg will act as the Diving Support Vessel (DSV) and will be on location in to carry out the pipeline disconnect activities using divers in 24hr operations. The pipeline disconnect campaign is scheduled to take place over a 10 days period. 

Irish Sea Pioneer is moving from Lennox Stanby position (Liverpool Bay) under tow to Blyth by the Tug 'Boka Summit'.

Pipeline survey using ROV.

Base case vessel is “Reach Remote 1” which is an unmanned vessel with 24/7 manning onshore.

Vessel Reach Remote 1 - n.b this is an unmanned vessel

Call sign  JXMQ

Water depth: approx. 70-150 m

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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.

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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.

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

All fishing vessels planning to operate in the survey area are requested to contact the Fisheries Liaison Officer (FLO) on board Ramform Atlas. Thor Alpha and Thor Omega are support vessels.   For more info, please contact Ramform Atlas or the support vessels on VHF ch 16 or 72 (working channel) FLO on email: bjarniba (at) gmail . com FLO on WhatsApp +47 413 97 983  

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.

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.

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.

Divers will be carrying out electical diagnotices at Triton and Guillemot West locations 

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.

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.

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See detailed map on our bulletin website

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.  

The Acoustic Spatial Capture- Re-Capture (ASCR) Array has now been temporarily removed for servicing and will be redeployed during this tranche of work (As-Laid coordinates will follow)  

An additional 2 Seabed Landers will be deployed within the Cardinal Buoys (Figure 1 and Table 2 of the attached notice) The deployment will be carried out by the by the BB Ocean estimated to take place ~ 2nd May 2026. These landers will only be deployed for 7 days (weather dependant) and will be marked by surface floats.  

Seabed moorings and Cardinal buoys remained in their original positions after servicing. Current positions of equipment are provided below.

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

 A full list of equipment details will be provided within the next notice once As-Laid positions are confirmed. 

Coordinates are provided in Table 1 and Table 2 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. 

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. 

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THe Vessel Deep Arctic will conduct diving operations at the BP WOSPS T location in 130m water depth to install a 40m (approx.) pipe spool & tie in assembly header into the existing West Of Shetland Pipeline System (WOSPS) and install GRP cover protection over the newly installed equipment. 

Mariners are advised that the Northern Endurance Partnership (NEP) will be undertaking an offshore Unexploded Ordinance (UXO) Investigation survey utilising an ROV (Remote-Operated Vehicles) within the southern North Sea. The survey is being conducted by the vessel Glomar Wave (see section 6 in the attached notice) and has been extended for a further 25 days due to weather conditions.  

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 Table of coordinates ) >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 has made a port call and a NFFO OFLO is now onboard to monitor fishing activities (contact details in section 7 of the attached notice) 

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 of the attached notice. 

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.On Swift 10 Navigation lights and Fog signals higher than 35 meters MHWS.

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 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.  

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. 

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.

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

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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

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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

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.

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

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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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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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.

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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.

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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.

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