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Debris Clearance Geophysical Seabed Survey - Seven Seas
Spirit Energy intend to conduct a debris clearance geological seabed survey at the Seven Seas well 48/7c-13y on or around 15th February 2026.
Spirit Energy intend to conduct a debris clearance geological seabed survey at the Seven Seas well 48/7c-13y on or around 15th February 2026. The survey will be undertaken by the Ocean Researcher MV and is expected to take approximately 2 days. This date is subject to change depending on operational requirements.
See detailed map on our bulletin website
NEP- Offshore ROV UXO & Crossing Investigation - Temporary Pause in Activity
Mariners are advised that the Northern Endurance Partnership (NEP) offshore Unexploded Ordinance (UXO) Investigation, within the southern North Sea which was being conducted by the vessel 4-Winds will be temporarily paused until further notice.
The 4- Winds has de-mobilised and is no longer on site.
The survey area is shown within Figure 1 and Table 1 of the attached notice.
The survey is still expected to extend into March 2026, a new notice of activity will be issued once information becomes available.
See detailed map on our bulletin website
Debris Clearance Geophysical Seabed Survey - Grove G5
Spirit Energy intend to conduct a debris clearance geological seabed survey at the Grove G5 well 49/10a-4 on or around 15th February 2026.
Spirit Energy intend to conduct a debris clearance geological seabed survey at the Grove G5 well 49/10a-4 on or around 15th February 2026. The survey will be undertaken by the Ocean Researcher MV and is expected to take approximately 2 days. This date is subject to change depending on operational requirements.
See detailed map on our bulletin website
Multibeam Bathymetric Survey - Irish Sea Pioneer, Liverpool Bay
Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of ENI UK Ltd) will be undertaking a seabed survey adjacent the Irish Sea Pioneer, Liverpool Bay. Please refer to the attached NtM for more details.
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Vertical Seismic Profile - Elgin Platform
Elgin Platform deployed seismic source for 1-well Vertical Seismic Profile (VSP)
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.
See detailed map on our bulletin website
Weather Buoy Installation – Rosebank Offshore Development Area
A tethered meteorological weather buoy will be installed at the given coordinates. Vessels are requested to keep safe distance.
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Rig - Deepsea Atlantic
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - COSL Innovator
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - COSL Promoter
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Valaris Stavanger
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.
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Rig - Seafox 4
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Danger - Protruding Isolation Plugs on End of Live Pipeline - Galahad
Following the removal of the Galahad monopod structure Perenco UK is warning mariners of protruding isolation plugs on pipeline PL1166, which is connected to the live/operational Lancelot Area Production System. An Isolated Danger Marker Buoy has been installed at the site of the former Galahad structure to mark this hazard.
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NEP Nearshore UXO Identification and Clearance ~ Delayed
A diver coordinated UXO identification and clearance activities for the Northern Endurance Partnership (NEP), was planned to begin on the 3rd February 2026. This activity has now been delayed by ~ 3 weeks. A new notice will be shared when asap.
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Failure of Navaid on Dunlin Alpha
The solar-charged battery-powered Navaid on the Dunlin Alpha gravity based substructure has lost functionality. Primary lights are not operational. Racon may be subject to intermittent outages. Thistle Alpha ERRV is maintaining marine surveillance and broadcasting regular text safety warnings by VHF. Full functionality is expected to be restored over coming weeks as day light hours lengthen. Change-out of the Navaid is scheduled for 2Q'26.
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Upcoming Diving Ops in Dana Bittern & Gannet E Fields in late February 2026
The DSV Seven Kestrel will be carrying out diving operations at the Dana Bittern DCB manifold to change out an CICM plus diving operations at Gannet E Well GE01 to isolate a flowmeter.
THe DSV Seven Kestrel is due to mob round about 24th Februay 2026 for about 4 days works in the Dana Bittern and Gannet E fields.
See detailed map on our bulletin website
West Cardinal buoy unlit - Banff Field
The Banff field west cardinal buoy is currently unlit due to storm damage affecting power supply. No AIS signal available from buoy. Buoy has been visually confirmed in correct location, with radar reflector in place.
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DSV Activity - Thistle Platform
DSV operations within Thistle 500m zone conducting decommissioning operations.
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Stena Don in Penguin Field in Northern North Sea
Stena Don in Penguin Field in Northern North Sea at Pan NW. Pre-lay anchors will be installed initially, rig will moor up immediately after anchors are installed. Rig will be on location for approximately 120 days, the anchor spread could remain until 31st October.
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Remedial & Recovery Campaign - Central North Sea
Perenco will conduct a Remedial and Recovery Campaign at various locations in the Southern North Sea. The campaign will start from 04th February and be completed by the end of April 2026.
Arthur - Remedial Cutting at former wellheads, former manifold and umbilical
E&A Well 49/29a-7 - Mattress Recovery
Leman 27 J - PL206 & PL207 Subsea Cutting
Inde 18A - PL76 Remedial Cutting & Inde 18 A Debris Removal
Davy North & East - Remedial Cutting & Debris Removal
See detailed map on our bulletin website
Geophysical & Environmental Survey
Geophysical & environmental survey at various locations in the Southern North Sea. The proposed surveys will utilise the N-Sea Geo Ranger vessel and include a combination of bathymetric multibeam echosounder (MBES), side scan sonar (SSS) and magnetometer, benthic grabs and camera drops.
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Decommissioning - Pickerill A
The OBANA Heavy Lift Vessel will undertake jacket removal activities at the Pickerill A installation.
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Decommissioning - Wenlock
The OBANA Heavy Lift Vessel will undertake topside and jacket removal activities at the Wenlock installation.
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Environmental Survey - Don
Environmental and Geophysical survey operations carried out by the vessel A78-02, on behalf of bp, shall commence approximately 29th of December. Survey operations are expected to last a duration of 7 days subject to any delay due to adverse weather.
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.
See detailed map on our bulletin website
Environmental Survey - Miller
Environmental and Geophysical survey operations carried out by the vessel A78-02, on behalf of bp, shall commence approximately 29th of December. Survey operations are expected to last a duration of 7 days subject to any delay due to adverse weather.
A78-02 shall be conducting an environmental survey in the Don Field. The survey shall comprise:
- ROV based geophysical surveys at approximately 1.5 knots using multibeam echosounder and sidescan sonar. This survey shall cover the former 500m zone and pipeline corridor between Don and Thistle.
- Environmental survey, of up to 24 stations. At each station the vessel shall complete ROV video transects and grab samples.
- ROV general visual inspection at the former Don Platform location.
Throughout the duration of the survey, the vessel shall have restricted ability to manoeuvre.
See detailed map on our bulletin website
Subsea Decommissioning - Western Isles Locations
Dana Petroleum (E&P) Limited has contracted Boskalis Subsea Services (BSS) for the Western Isles decommissioning project using the CSV Boka Northern Ocean.
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.
See detailed map on our bulletin website
Swift 10 MODU to move on location on the Sean Papa Platform current date for rig move 26th January.
The Swift 10 is contracted to ONE-Dyas to plug and abandon wells on the Sean Papa platform as part of the Sean Field decommissioning in the Southern North Sea for approximately 120 days. The rig will move from L8-P4 platform (NLCS) to Sean Papa (UKCS).
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.
See detailed map on our bulletin website
Survey Activity - Kyla Field
Fugro Searcher to undertake high res 2D seismic survey at proposed drilling location.
Survey works to last 14 days.
A single solid streamer of approximately 1,350 m in length will be towed behind the survey vessel during the 2DHR seismic operations.
See detailed map on our bulletin website
Decommissioning - Amethyst B1D
The OBANA Heavy Lift Vessel will undertake jacket removal works at Amethyst B1D.
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Rig - Safe Caledonia
The semisubmersible floatel Safe Caledonia is currently located at the Captain Field, positioned on the west side of the WPP platform. The unit is secured in place using a 10-point mooring system. While the floatel itself remains well within the WPP 500-meter safety zone, the majority of its mooring lines extend significantly beyond this boundary. These mooring lines are composed of chain, fiber, and rig wire, and are supported by intermediate buoys.
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Planned Rig Move – Dolphin PBLJ
This is to advise of the upcoming planned rig move for the Dolphin PBLJ. The rig will relocate from the Joanne Field to the Balmoral Field to undertake P&A operations. • Departure from Joanne Field: 21 January (Estimated) • Estimated Duration on Location: Approximately 140 days • Scope: Five well P&A campaign
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Rig - Valaris 120
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.
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Rig - Transocean Norge
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Linus
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Swift 10
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Prospector 1
This oil & gas drilling rig has moved to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Hazardous structure - Frigg
Large T section frame approximately 14 x 7 meters
Large t section frame of approximately 14 x 7 meters located during ROV seabed inspection
See detailed map on our bulletin website
Rig - Noble Resolute
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Offshore Development Area - Penguins Redevelopment Project
NOTE: The Penguins Field has been granted an extension to 31/05/26. The project includes extending the life of the existing wells and addition of eight new wells. The new wells will be tied into the existing Penguins infrastructure and connected into a new FPSO. The pipeline system will be split into a North and South production pipeline, with the FPSO positioned close to the centre of the field.
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.
See detailed map on our bulletin website
PL24 Cut-point Freespan - North Sea
The cut-point of PL24 is exposed and is protruding significantly from the seabed; approximately 18m long and 6m high. This creates an increased risk of snagging of trawling equipment, or similar, compared to a regular freespan.
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.
See detailed map on our bulletin website
Rig - Deepsea Aberdeen
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Safe Caledonia
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Irish Sea Pioneer
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Valaris 72
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Nordkapp
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble Innovator
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rigmove - Valaris 121
Oil & gas rigs are protected by a 500m safety zone and some may have anchors extending hundreds of metres outside this zone.
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Rig - Deepsea Stavanger
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Bollsta
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig Move - COSL Pioneer
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Askeladden
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Deepsea Yantai
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble Integrator
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Askepott
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble Lloyd Noble
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Buoy - Pierce Area #2
Yellow surface float with a diameter of 1 metre.
WGS84: 57° 09' 09.792''N, 002° 15' 28.554'' E
Clump weight: 500 kg steel ballast with mooring line attached
Deployment date: 02/10/2025
See detailed map on our bulletin website
Metocean Buoy Installed - Pierce Area #1
A yellow spherical anchored wave buoy
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
See detailed map on our bulletin website
Rig Move - Maersk Inspirer
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Valaris 122
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Paul B Loyd Junior
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - West Elara
This oil & gas drilling rig has moved to this new position. Rigs are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Noble Invincible
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Ensco 92
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Rig - Valaris 123
This oil & gas drilling rig has moved to this new position. Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone.
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Jackdaw Development - North Sea
The Jackdaw field is an ultra-high pressure/high temperature (uHPHT) reservoir that will be developed with a not permanently attended Wellhead Platform (WHP). Four wells will be drilled at the Jackdaw WHP. The export system consists of a subsea pipeline to the Shearwater platform. Vessels for 2025/2026: Deep Arctic or Deep Discoverer, Sleipnir, Seven Kestrel .
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
All Asset Inspection Campaign - Northern North Sea
The Vessel Armada 78 will be carrying Inspection Operations (Wells, Subsea Structures & Pipelines) in the vicinity of and between the locations noted below: UPDATE - MOB DELAYED Dates Now = 18th September to 27th November 2025 (Approx 70 Days) UPDATE: Project running over schedule : Now extended until Feb 2026
The Vessel Armada 78 will be carrying Inspection Operations (Wells, Subsea Structures & Pipelines) in the vicinity of and between the locations noted below:
UPDATE - MOB DELAYED Dates Now = 18th September to 27th November 2025 (Approx 70 Days))
UPDATE: Project running over schedule : Now extended until Feb 2026
See detailed map on our bulletin website
Metocean Buoy Installed - Penguins Area
A yellow spherical wave buoy with a diameter of 0.9 meters was installed in the Penguins Field. The buoy has a clump weight of 500kg (steel ballast with chain) and has a radius cone of 300m. LED light: 5 flashes in 10 s 20 s repetition 360° around for 4 Nm distance
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Western Isles infield subsea infrastructure decommissioning
Infield pipelines and manifolds associated with the Western Isles Development will be decommissioned
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 have appurtenances removed from their upper surfaces, but will remain in place until a decommissioning option is finalised. Wellheads will be left in place with existing fishing protection structures pending a future plug and abandonment campaign.
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 is on hold over Winter 2025/2026. A guard vessel will remain on site (weather permitting) over this period. Work will resume in Spring 2026.
See detailed map on our bulletin website
Infill Drilling - Cygnus Field
The Valaris Norway is adjacent to the Cygnus Alpha, operating within the 500m zone. Anchors may extend beyond this point. *Please note that there is a slight delay between Cygnus A and Valaris Norway navigational aid activation, following assessment a dispensation has been approved under CL/63/8*
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204/20a Schiehallion NW Drill Centre Wet Parked Marine Riser
In Q2 2024, a Semi-submersible Mobile Offshore Drilling Unit incurred an unexpected release of the Lower Marine Riser Package, and the associated Marine Riser. This fell to seabed in the Schiehallion NW drill centre. Subsequent works were undertaken to cut the riser into manageable sections, relocate them to a wet park area outside the 500m zone at Schiehallion NW. Stabilisation material was then installed to secure their position pending retrieval to surface and subsequent on-shore disposal.
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
Subsea structure with missing roof panels - PL873 "PDF" tee structure
PL873 "PDF" tee structure - roof panel not present.
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Wellhead Protection Structure - Abbey A02
32 ton fishing friendly wellhead protection structure, protruding approximately 6m above the sea bed with a 7m square footprint, protecting the Abbey A02 Wellhead.
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Foinaven Buoyant Risers within Water Column
Subsea Risers which left in the water column at Foinaven following the removal of the FPSO. These buoyant risers are now covered by 3 new 500m safety zones but do still pose a significant snagging hazard due to their size, number (13x) and height above seabed (160m at highest point). There is no surface infrastructure in the area hence this notification to supplement the 500m zones
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Plug and Abandonment Operations - Otter Wells
Noble Patriot to complete plug and abandonment operations at the Otter wells. Positioned with 8 x anchors within the radius of 61 30 52.206 North 00 57 4.215 East. Consent to Locate permit reference number: WIA/1727 CL/1556.
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Marine Installation Operations – Rosebank Development Area
Multiple vessels will be carrying out pipeline and subsea structure installation activities within the charted Rosebank Development Area. Other vessels are requested to keep safe distance.
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Nelson Platform Derrick & Substructure Removal Operations
Derrick & Substructure Removal Operations. Removal operations in advance of platform decommissioning.
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Solan platform has commissioned a Solar Navaid system
The Solan platform has commissioned a Solar Navaid system which is monitored by Trinity House.
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Noble Innovator - Mungo
Please be advised that the Jack-up rig 'Noble Innovator' is alongside the Mungo Platform, and will remain in this position for the foreseeable.
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Pipeline and Umbilical Installation (Subsea) - Belinda
Installation of oil production flowline, gas lift pipeline and service umbilical.
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.
See detailed map on our bulletin website
Bittern WI Pipeline replacement and tie in spool works - North Sea
Notification of commencement of Bittern WI Pipeline replacement and tie in spool works as per the condition of the Consent to Locate permit.
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.
See detailed map on our bulletin website
Bittern Valve Skid (BIVS) - North Sea
Notification of the commencement of the Bittern Valve Skid (BIVS)Works as per the condition of the Consent to Locate permit.
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
Valaris V121 over Shearwater Alpha
Valaris V121 MODU jack-up rig will be situated over Shearwater Alpha platform. Valaris V121 MODU will be on location at Shearwater until June 2026.
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