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Please be advised that from 10 May 2022 the South Coast Dredging Association will be undertaking a geophysical and seabed sampling surveys along the South Coast region within the areas shown in the charts. The surveys will employ hull-mounted multibeam echo sounder and towed sidescan sonar systems to acquire seabed data and a Hamon grab and / or a seabed video system to acquired seabed samples.

The geophysical works will be completed by personnel from GeoXYZ on the Geo Ocean IV. The seabed sampling works will be completed by personnel from Eco Marine Consultants on the Aquatech Surveyor. Vessel details are presented in Table 1 below. The work is expected to take approximately 6 to 8 weeks in suitable weather conditions, although adverse weather conditions may mean that the total estimated survey time is spread over a longer period.

This notification is intended for circulation to all interested parties undertaking activities in the vicinity of the planned survey works.  Further details regarding the surveys can be obtained by contacting either the Liaison Programme Coordinator or the Fishing Liaison Representative using the contact details at the head of this communication.

Details are presented within the attached doucment and on the charts shown with this notice.

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Geophysical survey operations involving hull mounted multibeam echosounder and towed side scan sonar (SSS) of the Triton Knoll wind farm assets will commence in mid-June from the vessel Cerys Line (27m LOA).

The SSS will be towed up to 150m astern. A wide berth is requested at all times as the vessel will be restricted in her manoeuvrability. 

Environmental survey operations will commence in early-mid July, following completion of the geophysical survey.

Drop down video and sediment grab samplers will be deployed from the stern of the vessel, restricting manoeuvrability.

Cerys Line will exhibit lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

Mariners are advised that the following vessels continue to be active 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.

Local Notice to Mariners Recently

NtM 001-2022 (24th January 2022)

NtM 002-2022 (28th January 2022)

NtM 003-2022 (08th March 2022)

NtM 004-2022 (09th March 2022)

NtM 005-2022 (14th March 2022)

NtM 006-2022 (30th March 2022)

NtM 007-2022 (7th April 2022)

NtM 008-2022 (7th April 2022)

NtM 009-2022 (10th April 2022)

NtM 010-2022 (19th April 2022)

NtM 011-2022 (04th May 2022)

NtM 012-2022 (04th May 2022)

NtM 013-2022 (06th May 2022)

NtM 014-2022 (06th May 2022)

NtM 015-2022 (13th May 2022)

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 works will contain both geophysical and seismic surveys, carried out using towed equipment. The towed streamer(s) is up to 320 m behind the vessel.  It is therefore requested that all vessels maintain a minimum 1800m separation distance from the survey vessel and pass at reduced speed.

A detailed survey will be carried out along several corridors within the survey area. The survey work will be hull mounted Multibeam sonar and subbottom profiler work, along with towed Side scan sonar and piggy backed magnetometer-up (tow max 320 m).

During operations the Northern Franklin 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.

The development of the windfarm is made up of several elements - current ongoing elements include:

Export Cable Installation

The cable laying vessel, NKT Victoria, is currently in Karlskrona in Sweden, loading the second part of the export cable. On completion of loadout the NKT Victoria will return to site and continue the cable installation, joining the cable and continuing to lay towards the construction site.

Guard Vessels

Guard vessels are deployed along the export cable route.

Cable Burial

The trenching support vessel, Grand Canyon III, is currently conducting post-lay burial operations, including post-trench survey, on the Dogger Bank A export cable. The exact sequence of trenching and post trench survey will be subject to on-site conditions and operational planning, but in general is typically undertaken in 10-20 km blocks of alternating trenching followed by survey.

Inter Array Cable Boulder removal and route clearance

The Offshore Supply Vessel, WORLD PEARL, will perform the Route Clearance operations on Dogger Bank A Inter-Array Cables routes.

The operations include the relocation and/or removal of subsea objects, such as debris (e.g. steel wire) and boulders, by means of a subsea Grabbing Remoted Operated Vehicle (GROV) within the array cable routes.

Scour Protection Installation The fall pipe vessels Flintstone and Simon Stevin will supply, transport, and install scour protection at 95 monopiles foundations on Dogger Bank A.

For further details of current offshore construction activities, please contact the people below or see attached Weekly Notice of Operations.

See detailed map on our bulletin website

See detailed map on our bulletin website

As part of the Abigail project we will be installing a 12km 6”/10” pipe in pipe production pipeline with a piggybacked 3” gas lift pipeline. The pipelines will be installed between the Abigail drill centre (a new manifold will be installed and one production well initially) and the existing Greater Stella Area Main Drill Centre Manifold.  The pipelines will be installed using a reel lay vessel and will then be trenched and buried for protection.  The current project schedule indicates that the installation workscope is due to commence offshore in May 2022.

The pipeline coordinates for the start and end points are summarised in the table below.  The pipeline crosses the existing Ithaca Stella Gas Export Pipeline (trenched and buried), and the crossing will be rockdumped for protection, the location is also detailed in the table below.  The installation is planned to commence in May and conclude end of August/September.  The initial planned campaigns are structure installation early May, followed by pipeline installation, pipeline trenching, umbilical installation (into the trench) and then backfilling.  The Dive Support Vessel is the last workscope and mobilises in August to perform the spoolpiece tie-ins and leaktesting.

The pipeline installation is due to commence 26th May (mobilisation) and complete by 5th June (demobilisation).  The infield dates are 1st June to 4th June.

*coordinates are Universal Transverse Mercator (UTM) Zone 31 using international spheroid (ED 50), central meridian 3º East.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

 Scottish Hydro Electric Transmission Plc, will be undertaking diving operations at Noss Head to assist with cable pull-in for the Shetland HVDC Link. The works are located approximately 400m offshore in around 19m of water.

The Shetland HVDC link is a critical electricity transmission link and will form part of the electrical transmission grid that is essential to the transport of renewable energy between the locations where it is generated and areas of demand, and the delivery of both Scotland’s and the United Kingdom’s 2030 climate change targets.

Three Horizontal Directional Drilled (HDD) ducts were installed at the site in 2021. These ducts are currently protruding from the seabed. Diving operations are planned to be undertaken at the protruding duct locations between the 8th June 2022 and 6th of  August 2022 to assist with cable pull-in. A wider area, referred to as the ‘Mooring Area’, is the area in which the diving and cable pull-in operations will take place.   

Vessels are required to maintain a safe distance from the ‘Mooring Area’ until the estimated completion date of 09 August 2022.

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

 Operations are anticipated to mobilise from Lowestoft on 24 May 2022 with investigations targeting the Lowestoft Banks, Minsmere A and Minsmere B sites. The works will last for approximately 8 days, allowing for mobilisation, de-mobilisation and weather contingency.

A metocean buoy was deployed in Loch Ewe, hosting oceanographic instruments measuring meteorology, ocean physics and chemistry, and transmitting scientific and positional data in real time.  We would be grateful if all shipping keeps clear of the instrument.  The buoy has a beacon illuminated FL 5 Y 20 s, a radar reflector and St Andrew's Cross, and is painted yellow.

We have positioned a scientific buoy recording metocean variables for the study of atmospheric and ocean physics, and water chemistry in the South of Arran Nature Conservation Marine Protected Area.  Marine Scotland Science, Marine Laboratory Aberdeen, will be grateful if all shipping keeps clear of the instrumentation.

See detailed map on our bulletin website

The nearshore geophysical, geotechnical and environmental (benthic) survey of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project cable corridors will commence on the 1 June 2022. The survey involves the use of Multibeam Echosounder (MBES), Sub-bottom Profiler (SBP), Sidescan Sonar (SSS) and Magnetometer equipment, some of which will be towed approximately 50m astern of the vessel, during June. This will also include lowering equipment to the seabed to acquire environmental and geotechnical samples. Drop-down camera and grab samples will also be collected approximately every 1km during this period as well.

The survey area will cover areas inshore of the 15m water depth to approximately 2m. However, the survey vessel will only survey within a 1.5km width corridor within the survey area. The outline programme of works is provided below (not inclusive of weather delays).

All vessels are requested to maintain a safe distance (0.5 nm) from the survey vessel Titan Endeavour at all times. Vessels will display appropriate shapes and lights when surveying.

Contact details for the Fishing Industry Representative are provided below.

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.

The work will be performed from 25th of May 2022 up until approximately 30th of July 2022. Work will be continuous, 24 hours a day. Coordinates of the scour protection locations are presented in Table 1 in the attached NtM.

During operations, the Flintstone and Simon Stevin 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.

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

See detailed map on our bulletin website

The vessels will be limited in manoeuvrability therefore, vessels working in the area should proceed with caution within 1NM from the cable ship during operations and all activity should remain clear 250m either side of the vessel, 500m corridor in total.

For a further breakdown of operations, please don't hesitate to get in touch.

See detailed map on our bulletin website

The frame sits on the seabed in water of at least 35m depth, with no surface infrastructure such as buoys or markers. Vessels will be able to pass safely through the area and above the frame. Use of static or mobile benthic fishing gear in the immediate area should be avoided to avoid the risk of snagging.

See detailed map on our bulletin website

See detailed map on our bulletin website

Nature of Operations

Concrete mattresses will be installed on the Rhyl Flats cable crossing by the NP459. A cable repair will follow also executed by the NP459. The NP459 will be operating on an eight anchor mooring plan. Cable lay and recovery operations will be undertaken by the NP459.

The Sea Bravo and Forth Jouster will be anchor handling in support of the NP459.

The Zwerver III will be carrying out de-burial and burial operations before installing post cable lay concrete mattresses on the Rhyl Flats cable crossing. 

The Mareel Scarlet will support the other vessels executing the works.

The work will be carried out in the cable corridor route as shown in figure 1. We kindly ask that all vessels in the local vicinity observe at least 1000m stand off from the NP459 at all times because of her anchor spread and a 500m stand off from the other vessels involved in the work scope.

During the works, the vessels will display the lights and signals relevant to the operations and will be monitoring VHF Channels 16 and 12.

See detailed map on our bulletin website

The dive vessel Seven Kestrel will be installing spools at the Southwark platform and the connection point with the Thames pipeline.  Work will also be undertaken on the mechanical connector at the 24-inch manifold on the Blythe pipeline connection point.  Some protection work will also be undertaken on the umbilical at the Blythe platform.

During May/June 2022 the Geoquip Saentis, on behalf of IOG PLC, will undertake a geotechnical site survey prior to undertaking appraisal well drilling at both its Kelham and Goddard appraisal sites, and at the proposed Nailsworth development.

The geotechnical work will consist of a 50m borehole and a number of 35m CPTs.

The survey work is expected to take two to three days on each site. The vessel is scheduled to commence mobilisation circa 22nd May 2022.

The installation will be performed from the DP vessel Seven Borealis, expected to be on site 4th June to 11th June.  

Call-sign: C6YG8

IMO: 9452787

Length and breadth: 182m x 46m   

The vessel will be deploying a pipeline, which will restrict its ability to manoeuvre.  It is requested that all vessels operating within the area keep a safe distance (500m) and pass at reduced speed.

Operations will be conducted on a 24-hour basis.

Throughout the operations the vessel will be displaying the shapes and lights prescribed in the International Rules for the Prevention of Collisions at Sea (COLREGS) Rule 27, (Vessels not under command or restricted in their ability to manoeuvre).

Prior to the pipelay operation, the Anchor Handling Tug Siem Pearl will deploy the initiation anchor and pull wire.

The anchor and pull wire will be within the combined 500m safety zone of the Southwark Platform and the Nobel Hans Duel drilling rig.

Siem Pearl details:

Call-sign: LDZH

IMO: 9417684

Length and breadth: 91m x 22m     

The anchor is expected to be deployed around 20th May and recovered around 3rd July.

GVI, MBES, FMD, CP. all non intrusive and all ROV work. 

Metocean instrumentation and floating LiDAR instrumentation have been deployed within the boundary of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project sites in the Irish Sea.

The metocean instrumentation within the Mona and Morgan Project site were deployed successfully in November 2021. It should be noted that instrumentation is deployed on the seabed some distance from the surface buoy, so marine users are requested to maintain the safe clearance distances as outlined in Section 3 below. Further details on the mooring design are available in Section 7. Metocean instrumentation at the Mona (South) location has been temporarily recovered from site due to damage to the mooring; this is planned for redeployment during the w/c 16 May. A service visit of the Morgan metocean instrumentation is also planned during the w/c 16 May.

The floating LiDAR instrumentation were successfully deployed at the Mona Project site and the Morgan project site in March 2022. It should be noted that instrumentation is deployed on the seabed some distance from the surface buoy, so marine users are requested to maintain the safe clearance distances as outlined in Section 3 below. Further details on the mooring design are available in Section 7. The AIS on the Mona floating LiDAR is not currently operating, but all other safety measures remain active and functional – repair work is planned for the w/c 16 May. A service visit of the Morgan floating LiDAR is also planned during the w/c 16 May.

The equipment will be maintained in position via appropriate mooring systems and will gather metocean data to inform the proposed Project. Details of the devices and relevant Aids to navigation are provided below.

The metocean instrumentation and floating LiDAR equipment service visit planned for the w/c 16 May will be carried out by the Forth Jouster and is expected to take approximately 4 days. During the Floating Lidar servicing it will either be towed to port or landed on the deck of the vessel for servicing prior to redeployment.

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All vessels are requested to maintain a safe distance (500m) from the maintenance vessels (Forth Jouster, Vital or Vector) at all times. All vessels are requested to maintain a safe distance (400m) from the deployed monitoring equipment at all times.

Further details can be found within the attached NtM.

A-2-Sea Solutions Ltd will be operating the vessel 'Noortruck' on a 24-hr basis, sailing survey lines between 5-10 knots.

Noortruck will only be using hull mounted survey equipment.

Noortruck will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

A-2-Sea Solutions Ltd will be operating the vessel 'FPV Morven' on a 24-hr basis, sailing survey lines between 4-10 knots.

FPV Morven be towing survey equipment upwards of 100m astern in the two most southern survey areas (Area 393) . The northern most area (457) will only be using hull mounted survey equipment.

FPV Morven will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

A geophysical and environmental (benthic) survey of the proposed Morgan and Mona Offshore Wind Farm Project will commence on the 01.04.22 for approximately 2 months. The survey involves the use of Multibeam Echosounder (MBES), Sidescan Sonar (SSS) and Magnetometer equipment, some of which will be towed approximately 150 m astern of the vessel.

The extent of the planned survey is shown in Figure 1. The initial phase of the survey will cover the main offshore array areas, plus a larger buffer area (phase 1 survey). The survey vessel will start in the northern polygon and progress south. The second phase of the survey will cover the potential offshore cable corridors (phase 2 survey) up to the 15m water depth, with the vessel starting within the Mona potential cable corridor.

Coordinates of the offshore array are also provided below.

An Offshore Fisheries Liaison Officer (OFLO) will be present aboard the survey vessel – see details below.

Any at sea, operational issues should be directed towards the OFLO in the first instance.

More general queries about the survey and/or proposed Project can be directed towards the Fishing Industry Representative (FIR) and the Company Fisheries Liaison Officer (CFLO) – see details below.

All vessels are requested to maintain a safe distance (500m) from the survey vessel Ocean Observer at all times. Vessels will display appropriate shapes and lights when surveying.

The works will be performed in a single campaign, commencing on the 19th of May 2022 and continuing until approximately 3rd of July 2022. The works will be continuous, 24 hours a day. Charts of the DBA IAC routes are provided below.

The operations include the relocation and/or removal of subsea objects, such as debris (e.g. steel wire) and boulders, by means of a subsea Grabbing Remoted Operated Vehicle (GROV) within the array cable routes.

During operations, the WORLD PEARL 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 1.5Nm separation distance from the Offshore Supply Vessel and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor.

UP-DATED NOTICE OF SEISMIC AND UNMANNED SURVEY OPERATIONS – HAMILTON GAS FIELD AREA

LIVERPOOL BAY EASTERN IRISH SEA

SEISMIC SURVEY OPERATIONS by the 92 meter Seismic Survey Vessel ‘SW Bly’ remain ongoing and operational in the area of the  HAMILTON GAS FIELD.

ALL MARINERS PLEASE NOTE that survey operations will at times enter into the Liverpool Ports Limits during the next few days and during these periods ‘SW Bly’ will follow the Traffic Separation scheme also a Liverpool Pilot will be onboard

This survey will eventually cover both the ‘HAMILTON and the LENNOX GAS FIELDS’ but as previously advertised will first complete in the Westerly section of the survey area, the HAMILTON GAS FIELD.

Attached is an updated Notice to Mariners issued by Shearwater concerning this first part of survey with a slightly extended Greater Working Area. PLEASE READ THE NOTICE

Included in the notice is a small chartlet showing the slightly extended boundary of the survey area marked with the Lat and Long coordinates. There is also a picture of the survey vessel ‘SW Bly’ as well as diagrams of the towed equipment including the Source Floats, Front and Diverter Floats as well as the Seismic Cable Array and Yellow Tail Buoys. Pictures of the Support / Scout / Guard Vessels are also attached

PLEASE NOTE : AT ALL TIMES WHILE ON-SITE THE SURVEY VESSEL ‘SW Bly’ WILL BE OPERATING AS A VESSEL OF ‘RESTRICTED MANOUEVERABILITY’ WHILE MAINTAINING A SPEED OF AT LEAST 3 KNTS.  

FOUR SUBMERGED 3D SEISMIC CABLES ARE DEPLOYED AT A LENGTH OF 1.2 NUATICAL MILES ASTERN – EACH MARKED AT THE TAIL END BY A YELLOW BUOY

THEREFORE A WIDE BERTH 1ml ACROSS THE BOW, 1ml DOWN BOTH SIDES AND 2ml ACROSS THE STERN IS REQUESTED WHENEVER THIS VESSEL CAN BE OBSERVED ON SITE.

‘SW Bly’ will be assisted on-site by the support vessel ‘OCEAN DON’ and the Scout / Guard boats ‘LADY HELEN’ and ‘JULIA ANNE’, Pictures of all three vessels attached.

Further notices will be issued before survey operations move into the LENNOX GAS FIELD AREA

……………………………………………………………………………………………………………

UNMANNED SURVEY OPERATIONS

The third attachment is the latest up-date from XOCEAN concerning their UNMANNED SURVEY OPERATIONS and this update includes two small chartlets, the first one shows the general Operational Area while the second one shows the Operational Area divided into survey blocks, or zones. There is also a picture of the Guard Vessel ‘SILVER HARVESTER’ which is accompanying these vessels PLEASE READ THE NOTICE

Dependant on weather and conditions survey operations for this area could run into early or mid-May.

……………………………………………………………………………………………………………

An Offshore Fisheries Liaison Officer will be onboard ‘SW Bly’ to assist in any communications and the location of the areas of work.

Contact details for the Fisheries Liaison Officer :

Frank Mackie 

Mobile or WhatsApp 07742 604784 

E-mail……fmackie15@gmail.com

VHF Channel 16 : request to speak to the FLO

A listening watch will be kept on VHF Channels 16 & 12 and both the support vessel and the Guard / Scout boats can be contacted for information relating to vessel movements only.

PLEASE READ THE NOTICE and do not hesitate to contact me if you are unsure about any of the above or require any further information, also please pass this information to any of your colleagues who you think might be interested.

These notices are primarily aimed at fishermen who operate in the area of the survey but this information will also be of interest to all other mariners and users of the sea who operate in the Eastern Irish Sea.

If you know of any fisherman or any other user of the sea who works the area and does not receive this information or anybody else who would benefit from this information please let me know.

Please do not hesitate to contact me if you are unsure of anything or require any further information

Regards  :  Tom Watson

Tel……..…..Home 01253 875565

                   Mobile 07903 173 624

See detailed map on our bulletin website

Ithaca Energy (UK) Ltd is planning to use the COSLPioneer to drill UB05P well and suspend A2Y at Captain Drill Centre C.  The activity will last approximately 150 days (including anchor pre-lay).  The Captain platform ERRV will act as a guard vessel at the location from when the anchors are pre-laid until the COSLPioneer arrives.

The field lies within the United Kingdom Continental Shelf (UKCS) Block 13/22a, approximately 91 km North of Aberdeen and 191 km from the UK/Norway median line.

See detailed map on our bulletin website

See detailed map on our bulletin website

Redeployment and Operation Floating LiDAR System

To inform the engineering designs and Environmental Impact Assessments (EIA) for the proposed Valorous Floating Offshore Wind Farm (FLOW), a Floating LiDAR and associated mooring system has been successfully redeployed within the boundary of the proposed Valorous Floating Offshore Wind Farm (FLOW) project site.

The Floating LiDAR is maintained in position via appropriate mooring systems. The Floating LiDAR will remain at the location listed below for a 11-month period. Details of the device and relevant Aids to Navigation are provided within the attached NtM.

All vessels are requested to always maintain a safe distance (100m) from the Floating LiDAR.

The Floating LiDAR equipment will undergo regular scheduled maintenance during the operation period, further notice to mariners will be issued confirming the dates and maintenance activities

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

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

Geophysical Survey

It is expected that geophysical survey operations in the area will commence on Sunday 24th May for a period of 6 days. The survey will be conducted using the ‘Wessex Explorer’ using a vessel mounted multibeam echosounder.  Multibeam data will be acquired in nine small survey areas within the wider area detailed in this notice. ABPmer have completed these works successfully in previous years and understand the importance of working with the fishing industry and as such will always work around fishing gear and fishing activity.

Geophysical Survey Vessel

Wessex Explorer

MMSI: 235008166

Vessel Mobile: 07913 810292

Drop-Down Video Survey

Three one-day drop-down environmental video surveys will be conducted within the same survey areas (with the exception of area C). These will be conducted on w/c 23rd May OR w/c 5th June, w/c 4th July and w/c 18th July. The video will be towed up to 100m astern of the Littlehampton Harbour Board vessel, ‘Erica’.

DDV Survey Vessel

Erica

MMSI: 235080084

Littlehampton HM: 01903 721215

Survey work

Survey operations along the pipelines will be carried out by the vessel Mersey Discovery.  Survey operations will involve the use of both hull mounted equipment and towed sub-surface equipment which may extend up to 200m behind the vessel.  The survey is due to start on the 14th May 2022 and to last for up to 20 days, subject to weather and sea conditions.

The purpose of the survey is to examine the extent of burial and exposure of these pipelines along their route, identify any freespans, and to monitor the condition of the pipeline.

Vessel details

The Mersey Discovery is an 11.5m Redbay RIB with a grey superstructure.   The vessel details, including details on its current location can be accessed at the Marine Traffic website using the link below:-

• Mersey Discovery: survey vessel | Call sign MJIA2

During survey work the vessel will be restricted in the ability to manoeuvre.  It will display the appropriate day shapes and lights.  The vessel will actively transmit an AIS signal.  Survey speed will be around 3-4 knots.

Mariners are requested to give the survey vessel a wide berth and pass at a slow speed during these operations.

Location

A map showing the location of the survey work is provided in the Notice to Mariners that can be downloaded here.  The approximate landfalls of each pipeline are provided below for reference.

The Evelyn field is located within UK licence P1792 approximately 7.5km to the South West of the Dana Operated Triton FPSO. The development will consist of a single gas lifted production well EV01.

The 8" Pipeline route runs from the Evelyn valve skid (EVVS) drill centre tie-in structure in a north east direction to a comingling tie-in structure (GEEBB) which will comingle production fluids from Gannet E, Evelyn and Bittern. The GEEBB structure will be located outside the Triton swing circle, but inside its 500m safety zone. The 8-inch pipeline will be trenched and buried using trench backfill material. Areas which are not trenched at the Evelyn and Triton approaches will be protected from fishing gear interaction and/or dropped objects by a combination of rock placement and concrete protection mattresses.

The 3" Pipeline route runs in a south westerly direction between the GEEBB tie-in and distribution structure to the Evelyn valve skid (EVVS) drill centre tie-in structure. The GEEBB structure will be located outside the Triton swing circle but inside its 500m safety zone.  The 3-inch gas lift pipeline will be piggybacked to the larger 8-inch production pipeline and will be trenched and buried using trench backfill material. Areas which are not trenched at the Evelyn and Triton approaches will be protected from fishing gear interaction and/or dropped objects by a combination of rock placement and concrete protection mattresses.

The 9.5 km control umbilical will be installed from the EVVS to the umbilical riser base at Triton FPSO.  The umbilical will contain a total of 16 cores and will provide hydraulic, electrical and chemical supplies from the Triton dynamic umbilical at riser base SY9516A to the EVVS and wells

Staff from the Scottish Association for Marine Science (SAMS) will deploy and recover three scientific moorings inside the Hywind Scotland wind farm lease site, ~25 km offshore from Peterhead. Expected deployment duration will be several weeks, from as early as May 9, 2022, up until the end of June 2022.

Moorings will contain passive acoustic recording equipment intended to record sound produced by operational wind turbines. Moorings will be located within the Hywind Scotland lease area boundary, at 300 m, 600 m and 2,000 m from one of the wind turbines, at water depths of around 110 m. Moorings will extend up to 110m along the seafloor using weighted lines, and will not extend more than a few meters into the water column (there will be no surface expression). Deployment and recovery will take place using acoustic release-based methods, using Moray First Marine Ltd. vessels travelling from Peterhead. Deployment and recovery activities of all three moorings are expected to be completed within a single working day (again, weather permitting).

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The vessels Northern Wind and Northern Storm are performing multibeam survey in the area Fifeness to Montrose on behalf of UKHO/MCA. The aim of the survey is to update nautical charts.

The vessels use only hull-mounted equipment, no towed equipment is used. Please be advised that the vessels have limited manoeuvrability. The survey is performed as 24/7 operations if the weather permits and is estimated to be completed by end-June.

The survey area is divided into smaller blocks which can be seen in one of the attached figures. Which block Northern Wind will work in at a certain time depends on weather, number of anchored vessels, if day light operation is needed etc.

Northern Storm will work in block G, K and L.

The moorings support sound recording equipment, and / or acoustic loggers that record echolocation clicks of dolphins and porpoises. Where moorings are subsurface, they extend no more than 3 m vertically from the seabed. The recording equipment and moorings will remain at these locations for 6 months and should be retrieved in October 2022. 

Whether this is wreck 3044 or an uncharted wreck can however not be confirmed.

See detailed map on our bulletin website

Please be advised that Aspect Land & Hydrographic Surveys Ltd (on behalf of SHEPD) will be undertaking subsea and freshwater inspections of several cables within a defined corridor.

Given the different conditions and water depths anticipated at each site, a range of vessels will be utilized across the project. The inspection works will be centered on a 50m cable corridor.

Survey operations at these locations are expected to commence in May 2022, with start dates and anticipated durations given in the attached NtM.

VESSEL DETAILS All vessels to be used during the survey and inspection campaign are owned and operated by Aspect Land & Hydrographic Surveys Ltd. Operations will be limited to daylight hours only.

The vessels conducting these inspections will be restricted in their its ability to manoeuvre and will display the appropriate lights and shapes. Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m (COLREGs Rule 16 & 18) during marine operations.

All vessels will monitor VHF Channel 16 throughout survey operations. Mobile contacts for the vessels are listed at the end of the attached NtM.

A-2-Sea Solutions Ltd will be operating 'FPV Morven' on a 24-hour basis, sailing survey lines between 5-10 knots.

Equipment will not be towed and only a hull mounted multibeam echosounder will be used.

FPV Morven will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

Once installed in the Morlais demonstration zone the frames will sit on the seabed at depths of at least 30m, with no surface infrastructure such as buoys or markers. Vessels will be able to pass safely through the area and above the frames. Use of static or mobile benthic fishing gear in the immediate area should be avoided to avoid the risk of snagging.

The positions listed here are as deployed.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

During trenching operations and until the cable has been protected by means of burial or rock placement, the construction working corridor will remain closed for any static fishing, anchoring or use of other equipment with seabed intervention.

The trenching operations are planned to commence from the nearshore end of the cable route, beginning at the pre-cut trench at HDD exit, working towards the Offshore Platform. The exact sequence of trenching and post trench survey will be subject to on-site conditions and operational planning, but in general is typically undertaken in 10-20 km blocks of alternating trenching followed by survey. At existing third-party crossing locations (Langeled pipeline and SEAL pipeline), trenching exclusion zones of +/-20m shall be applied (no part of the trencher is to enter the exclusion zone).

During operations the Grand Canyon III 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 1.5Nm separation distance from the Grand Canyon III and pass at reduced speed.

Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor. In the period between cable lay and cable burial, or protection by rock placement, the cable will be exposed on the seafloor. During this time the cable is sensitive to any external impact and constitutes a snagging risk for anchoring, fishing gear or other equipment with seabed intervention.

To protect the cable in the 500m working corridor, guard vessels will be deployed along the route (described in a separate NtM). The guard vessels will contact vessels approaching within 1.5Nm.

See detailed map on our bulletin website

See detailed map on our bulletin website

We kindly request that ships and fishing vessels keep a distance of at least 1 nm from the cable installation vessel to ensure safe operations.  We also kindly request that any towed, set or drift gear, such as longlines, trawls gillnets, and seine nets be moved off the route by a distance of 1/2 nm on either side at the locations and during these periods noted above above in order to avoid gear entanglement. 

Vessel Name:                       CS DURABLE

Call Sign                                V7DI8.

VHF Working Ch.                  Monitoring 16 & 13

Activity:                                 Underwater Cable Operations

Location:                               West coast of Ireland, Rockall and UK EEZ in Atlantic waters (north to Iceland)

Activity Period:                     May 30 to August 15, 2022 [Subject to change]

24 hr. contact:                       Mobile +1 732 294 3058 when in cell range

Bridge VSAT:                       +1 346 201 5210

Office VSAT:                        +1 346 201 5209

EMAIL                                  csdrmaster@subcom.com

CSV Boa Sub C is due to mobilise in Sunderland on 4th May ’22 to undertake approx. a 21 day offshore campaign to execute the recovery of five (5) remaining suction anchors which were once used to moor the Voyageur Spirit FPSO – now off station. The vessel will be working in the former FPSO anchor pattern. On successful recovery of three suction anchors, the vessel will depart field to carry out an interim port call to offload in Blyth, before it will return to field to collect the remaining two suction anchors, returning to Blyth / Sunderland to demobilise.

See detailed map on our bulletin website

See detailed map on our bulletin website

Marine Scotland Science (MSS) intend to install 87 acoustic fish tracking moorings in the Beatrice and Moray East Offshore Windfarms areas (BOWL (38 moorings) and Moray East (49 moorings)) as part of the PrePARED programme of works. PrePARED is a collaborative research project coordinated by Marine Scotland Science which aims to concurrently study predator (seabird and marine mammal) and prey (fish) distribution and behaviour in and around offshore wind farms. The moorings hold research equipment that support hydrophone receivers. These receivers log the presence of fish, such as Cod, Haddock and Whiting which will be tagged with acoustic ID transmitter tag s (they will also record salmon and seatrout smolts migrating from Moray Firth Rivers tagged by the Atlantic Salmon Trust (AST) should they pass within range).

The moorings will be deployed from the 10th of April 2022 by a the Waterfall operated by Moray First Marine. The moorings will be removed by the 30th of August 2026.

Acoustic fish tracking moorings will not be surface marked and will be located on the seabed. The array moorings will extend vertically no more than 4 metres. The moorings will be serviced by boat, using the inbuilt acoustic recovery system. In the unlikely event of failure in the acoustic release system an ROV will be used from the same boat to service the mooring. Please note the acoustic fish tracking moorings are being deployed as close to the wind turbine generators as possible to minimise interference with fishing operations (50m), should these be accidently caught only the instruments are required to be returned and the location of the discarded weight should be supplied to MSS for recovery later.

Fish capture traps and timed-release cages (8 traps and cages in total) will be deployed in Moray East and Beatrice sites. These traps and cages will be used in the capture and managed release of fish needed for internal electronic tagging with acoustic ID transmitter tags. Traps and cages will be present at Moray East and Beatrice for up to 10 days commencing 13th of April. Traps and cages will move at 1 to 2-day intervals. All traps and cages will be marked with creel style floats and clearly marked “Marine Scotland Science” and be marked with an AIS beacon (visible as MARLAB 1 – MARLAB 8). Traps and cages will be at least 100 metres from turbine locations. Locations of traps and cages will be notified to the relevant windfarm Marine Control Centre as appropriate.

Contact details

All enquiries should be made to the Marine Scotland acoustics mailbox acoustics@scotland.gsi.gov.uk) marked for the attention of Robert Main. Switch Board Tel: 0131 244 2500

Mainland Orkney to Hoy North and Centre Cable Replacements: The projects are experiencing significant delays relating to offshore cable installation and no offshore operations will be taking place until further notice. The previous Notice to Mariners dated 1st April 2022 is now cancelled.

Please be advised that Global Offshore (on behalf of SHEPD) are conducting the installation of the replacement Mainland Orkney-Hoy North and Centre submarine electricity cables. The purpose of this notice is to outline the working area and operations for the vessels along the cable lay route. There will be three different vessels associated with the subsea cable installation process. In summary: 1. Cable Lay Vessel: Global Symphony (entire route) 2. Post-Lay Inspection of Cable: Global Symphony (entire route) 3. Post-Lay Stabilisation Works: C-Force (alternative vessels may be either C-Fenna or C-Odyssey) 4. Post-Lay Nearshore Survey of Cable: Delta 9151 (or equivalent vessel depending on availability)

Vessels carrying out the subsea cable works will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes. Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m from the construction vessels during marine operations (COLREGs Rule 16 & 18). Vessels associated with the works will monitor VHF Channel 16 at all times. Mobile contacts for the vessels are listed in the attached NtM. The vessels will be working 24 hours per day during these operations.

Cable Lay & PLIB Vessel Details The vessel that will be carrying out the crossing construction works, the cable installation works and also the cable post lay inspection operations is the Global Symphony.

Post Lay Stabilization Works Vessel Details The vessel that will be carrying out the post lay stabilization works on both North and Centre cable is the C-Force (or one of the listed alternative vessels).

Description of Installation Operations CLV Global Symphony will be installing concrete mattresses on crossing points and then lay the Mainland Orkney to Hoy North & Centre cables. The offshore post lay survey operations will be carried out by the Global Symphony immediately after completion of each cable lay operations. The construction vessel will be installing concrete mattresses and rock filter bags on both North and Centre cables at pre-determined locations as part of the post lay stabilization works. The nearshore sections of the marine cables will be surveyed using the Delta 9151 (or equivalent vessel). All above-described operations will involve ROV equipment deployed to seabed.

Fishing Liaison Officers (FLOs) Fishing liaison for the cable lay operations will be co-ordinated by Brown and May Marine (BMM). For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Alex Winrow-Giffin on 07760 160039, alex@brownmay.com or Meg Kalafat on 07702 710176, meg.kalafat@brownmay.com

The local Fishing Industries Representative (FIR) Chris Davidson (07810 305100), cad17@hotmail.co.uk will also be in place to liaise with the vessels and fishing operations in the area.

Carradale to Arran Subsea Cable Installation: The Project is experiencing significant delays relating to offshore cable installation and apart from works in Area A, no offshore operations are anticipated to be undertaken until further notice. The planned operation dates for Area A are now from the 15th May 2022 to the 15th July 2022.

This Notice to Mariners supersedes the original Notice to Mariners dated 1st April 2022.

Please be advised that Global Offshore (on behalf of SHEPD) are conducting the installation of the replacement Carradale-Arran submarine electricity cable. As part of the cable replacement project, along with the cable lay and burial operations, 2 off Horizontal Directional Drilling (HDD) operations will be carried out, with the aim to install 2 of 400mm SDR11 HDPE ducts that will allow the Carradale-Arran cable to reach the onshore connection point. The purpose of this notice is to outline the area for the duct installation works (Area A) as well as the working area for the cable lay and burial vessels along the cable lay route (Area B).

There will be multiple vessels associated with Carradale-Arran cable installation process. In summary: - AREA A: 1. Marine assistance to duct installation limited to the HDD punch out locations: C-Force (alternative vessels may be either C-Fenna or C-Odyssey). This will include diving ops being carried out at the HDD exit points.

- AREA B 2. Boulder Relocation – Global Symphony (entire route) 3. Cable Lay Vessel – Global Symphony (entire route) 4. Post-Lay Inspection Burial (PLIB): Global Symphony (entire route) 5. Post-Lay Nearshore Survey of Cable: Delta 9151 (or equivalent vessel depending on availability)

Vessels carrying out the above-mentioned subsea cable works will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes. Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m from the construction vessels during marine operations (COLREGs Rule 16 & 18). Vessels associated with the works will monitor VHF Channel 16 at all times. Mobile contacts for the vessels are listed in the attached NtM.

Ducts Installation Works Vessel Details The vessel diving works will be carried out on the ducts#1 and #2 from is the C-Force (or one of the listed alternative vessels).

Description of Duct Works After the HDPE duct is pushed into the bore, divers will install over the duct temporary ballast to keep the duct in position in preparation for the cable installation works. Once the duct is stabilized, divers will remove the bullnose and install a bell mouth on each duct. The duration of the operations is shown on table 1. All vessels will be limited in maneuverability. Other vessels should maintain an appropriate and safe distance of 500m when passing the vessels undertaking cable operations and should pass at the lowest speed to avoid vessel wash effects. The vessel will be working 24 hours per day during these operations.

Cable Lay & PLIB Vessel Details The vessel that will be carrying out the boulder relocation works, the cable installation works and also the cable post lay inspection and burial operations is the Global Symphony.

Description of Installation/PLIB Operations CLV Global Symphony will be relocating boulders in preparation for cable lay operations and will then lay the Carradale to Arran cable. The PLIB operations will be carried out by the Global Symphony immediately after completion of cable lay operations. The nearshore sections of the marine cables will be surveyed using the Delta 9151(or equivalent vessel). All above-described operations will involve ROV equipment deployed to seabed.

Fishing Liaison Officers (FLOs) Fishing liaison for the cable lay operations will be co-ordinated by Brown and May Marine (BMM). For any commercial fishery queries please contact the Company Fishing Liaison Officers (CFLOs) Alex Winrow-Giffin on 07760 160039, alex@brownmay.com or Meg Kalafat on 07702 710176, meg.kalafat@brownmay.com

The local Fishing Industries Representative (FIR) George White on georgewhite0@gmail.com (07761 873965). will also be in place to liaise with the vessels and fishing operations in the area.

See detailed map on our bulletin website

Pipeline route runs from the Gannet E Tie in Valve Skid (GETVS) structure at the drill centre in an easterly direction to a comingling tie-in the GEEBB manifold. 

The GEEBB manifold will be located outside the Triton swing circle, but inside the 500m safety zone.

The 9-inch flexible flowline will be trenched and buried using trench backfill material. Areas which are not trenched at the Gannet E and Triton approaches will be protected from fishing gear interaction and/or dropped objects by a combination of rock placement and concrete protection mattresses.

Methanol will be delivered from the Gannet E Manifold (GEM) to the Gannet E Tie-in Valve Skid (GETVS) via a dedicated 3/4" thermoplastic hose within the GEM to GETVS chemical/hydraulic jumper bundle.  The jumper bundle containing the methanol hose and will be protected from fishing gear interaction and/or dropped objects by a concrete protection mattresses and additional grout bags where concrete mattress placement is not practical. 

See detailed map on our bulletin website

The Evelyn Valve Skid (EVVS) is part of the Evelyn field development, consisting of a gas lift flowline piggy-backed onto a new production pipeline and a new umbilical for carrying control, power, hydraulic lines and chemicals from Triton FPSO to Evelyn. 

Evelyn will be connected to Triton via the existing Triton P1 Bittern production riser. 

The Evelyn valve skid (EVVS), will be installed at Evelyn, near the location of the EV-01 well, it will be connected to the EVVS from the EV01 xmas tree by the rigid production and gas lift spools pipeline and electrical and umbilical jumper bundles.  A 9.5 km control umbilical will be installed to the EV01 well via the EVVS to the umbilical riser base at Triton FPSO.  The umbilical will provide hydraulic, electrical and chemical supplies from the Triton dynamic umbilical at riser base SY9516A to the EVVS and wells.

The crater is known to be naturally backfilling with seabed sediment and is expected to continue to do so, particularly during winter months. The incremental risk posed by the 2 ft conductor stump is considered to be negligible.

See detailed map on our bulletin website

See detailed map on our bulletin website

We will be deploying three scientific Acoustic Doppler Current Profilers on the sea bed for 12 months from May 2022 to collect currents data for environmental monitoring and hydrodynamic model validation.  The instruments have no surface markers and will be recovered using acoustic releases.  Two of the instruments will be inside low profile trawl-resistant frame (Little Minch, west of Skye, and Linn Crowlin, east of Skye) and one inside a steel frame (Summer Isles).  See attachment for photos of the frames, a chart with their position and their positional details.

The Helix Seawell Light Well Intervention Vessel will be conducting works at the Bruce Field (Western Area Development). 

See detailed map on our bulletin website

A-2-Sea Solutions Ltd will be operating the vessel ‘Cerys Line’ and 'FPV Morven' on a 24-hr basis, sailing survey lines between 5-10 knots.

Cerys Line and FPV Morven will not be towing any equipment and only hull mounted mutlibeam echosounder will be used.

Cerys Line and FPV Morven will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

CNOOC Petroleum Europe Limited intends to install an 8” water injection pipeline, from the Scott (PD) Platform to the Telford water injection control structure, an 8” water injection jumper, and an electro-hydraulic umbilical from the central Telford manifold to Telford water injection control structure.

The works comprise:

Scott Field

• Installation of 10” NB water replacement injection flowline (PL6008)

• Disconnection of 10” failed water injection flowline (PL4567).

Telford Field

• Disconnection of failed water injection pipeline (PL2757) and its tie-in spools (PL2757JWF2/FG, PL2757JWH1/HA and PL2757JWH2/HB)

• Installation of 8” NB replacement water injection flowline (PL6010) and jumper (PL6009)

• Disconnection of failed umbilical (PL1284, PL1284.1, PL1284.2 and PL1284.3)

• Installation of replacement umbilical (PLU6011).

Vessels planned to execute the works are:

• Olympic Delta – ROV Support Vessel: Route/Pipeline Surveys; Concrete Mattress Installation; Pipelay Vessel Support.
• Normand Drott – Trenching Support Vessel.
• Apache II – Reel Lay Vessel.
• Deep Arctic – Dive Support Vessel: Umbilical and Flexible Lay from Reel Drive System; Pipeline System Tie Ins; Mattress Installation.
• Nordnes - Rockdumping.

For further information, please contact: Steven McKinney, Steven.McKinney@intl.cnoocltd.com

See detailed map on our bulletin website

Company: Outer Dowsing Offshore Wind

Contractor: GeoXYZ Limited

Survey vessel : Geo Ocean II

Survey vessel call sign: LXGP

Earliest start date: 26th March 2021 Latest finish date: 5th July 2022

It should be noted that the survey vessel is accompanied by a fishing vessel: Sorrento providing visual reconnaissance for any sea surface obstacles.

Company : Outer Dowsing Offshore Wind

Contractor : NFFO Services Limited

Support vessel : Sorrento

Support vessel call sign : 2XLE

During this survey the vessels will be deploying underwater survey equipment at which such times the survey vessel may have restricted ability to manoeuvre and approaching vessels are requested to pass at a safe speed and distance. Passing vessels are requested to give a minimum passing clearance of 300 m.

Project Description
Oceaniq Q&E route surveys will be conducted by MMT on behalf of Oceaniq, Global Marine Group. Global Marine are turnkey installation contractors to two fibre optic cable systems; Q&E North and Q&E South. A pre-installation geophysical survey with towed/tethered-equipment and sensors is scheduled between January and March 2022, with the installation is scheduled for 2023. The proposed subsea fibre optic cables are required to increase internet bandwidth capacity to meet rising demand. The International Cable Protection Committee (ICPC) notes that approximately 99% of the World’s communication are provided by such subsea cables.

Survey task
A detailed geophysical & geotechnical survey will be carried along the proposed cable route corridor of Q&E north and Q&E south.

• Q&E north is approximately 112 km long and a 500 m wide corridor.
• Q&E south is approximately 141 km long and a 500 m wide corridor.

The geophysical survey work will be conducted by vessels Deep Seapal & Marker with hull mounted MBES and SBP with ROTV mounted sidescan sonar, sub-bottom profiler and tethered magnetometer beginning January 2022.

Port of Operation
Deep Seapal and Deep Marker will mobilise in the port of Ramsgate, United Kingdom from 24th January 2022.
 

See detailed map on our bulletin website

See detailed map on our bulletin website

This is part of a wider deployment of three guard buoys and associated equipment from October 2021. The guard buoy replaces one previously lost buoy in January 2022. It will be installed at the same location using the same methods. The Forth Warrior is the planned deployment vessel. A notification will also be provided on Kingfisher Information Services.

Expected arrival on site is 14th to 30th April 2022 with the works completed the same day where possible, weather conditions permitting. Therefore, we would like the validity period for this Notice to Mariners to be the 14th April 2022 – 31st October 2022 to allow for any eventualities during installation operations and to cover any ongoing O&M activities throughout the deployment period.

Please see the attachment pdf for further details. 

Siem Stingray – This vessel will act as the Installation Support vessel, cable installation technicians will be deployed to the wind turbine generator foundation structures using the vessels’ motion compensated gangway system. The cable pulling equipment will be transferred onto the foundation structure and set up ready for the cables to be pulled into the structure and secured in the foundation basement. The motion compensated gangway system can be used for personnel and cargo transfers.

Seaway Phoenix – This vessel will lay the inter array cable between adjacent foundation structures. Once the cable has been pulled in and secured at the first foundation, the cable will be surface laid to the second foundation, pulled in and secured. On completion of this operation the cable will be trenched to a pre determined depth utilising a remotely operated trenching vehicle.

A geophysical survey of the proposed Morven Offshore Wind Farm Project will commence on the 11.04.22 for approximately 3 months. The survey involves the use of 2DUHR equipment, Multibeam Echosounder (MBES), Sidescan Sonar (SSS) and Magnetometer equipment, some of which will be towed approximately 150 m astern of the vessel. Drop-down camera and grab samples will be collected at approximately 86 locations during the survey, the timing of which is not yet confirmed; Cone Penetration Tests (CPTs) will be undertaken at approximately 150 locations during August; approximately 15 boreholes will be undertaken during September/October.

All vessels are requested to maintain a safe distance (500 m) from the survey vessel Ocean Geograph at all times. Vessels will display appropriate shapes and lights when surveying.

An Offshore Fisheries Liaison Officer (OFLO) will be present aboard the survey vessel – see details below.

Any at sea, operational issues should be directed towards the OFLO in the first instance.

More general queries about the survey and/or proposed Project can be directed towards the Company Fisheries Liaison Officer (CFLO) – see details below.

Following removal of the jacket structure below sea level, there remain a significant number number of seabed structures & items that are potential snagging hazards, within approx. 200 metres of the jacket position. These include:

• Jacket footings (to 46 metres above seabed)
• SSIV structure
• 12 impressed current anodes and associated cables
• Umbilicals
• Pipeline crossings, spans, exposed flanges/bolts
• Pipeline repair clamps with exposed bolts.

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

The Survey vessels Fugro Venturer and Fugro Galaxy will be used as main the vessels to carry out the MarramWind site investigation campaign. At this stage this campaign relates to the Offshore Windfarm (OWF) array area only. Vessel turning areas will extend up to 1km beyond the survey lines.

The Site Investigation campaign will comprise of the following surveys for the provision of the data outline below.

• Geophysical survey - consisting of a bathymetry survey using multi-beam echo sounding (MBES), hydro-acoustic positioning tracking USBL system, seabed mapping (side scan sonar (SSS), sub-bottom profiling (SBP), and seismic 2DUHR. The purpose of the geophysical survey is to identify the seabed and sub-seabed conditions within the survey area.
• Geotechnical survey - a sampling and testing programme within the survey area to evaluate the nature and mechanical properties of the superficial seabed sediments. The survey programme includes vibro-coring and piezocone penetrometer testing (PCPT).
• Environmental survey - to map the distribution and extent of marine benthic habitats. This will comprise a benthic sampling programme to collect drop-down video (DDV) footage and grab samples for the analysis of benthic fauna, particle size distribution, and sediment chemistry.

The MarramWind Offshore Wind Farm Site Investigation Campaign will commence from 11th April and run until the 30th November 2022 (including potential for weather delays/downtime).

Please be advised that Global Offshore (on behalf of SHEPD) are conducting the installation of the replacement Mull-Coll submarine electricity cable. The purpose of this notice is to outline the working area for the vessels along the cable lay route. There will be two vessels associated with the Mull-Coll cable installation and post-lay survey process. In summary:

1. Boulder Relocation – Global Symphony (entire route)

2. Cable Lay Vessel – Global Symphony (entire route)

3. Post-Lay Inspection Burial (PLIB): Global Symphony (entire route)

4. Post-Lay Nearshore Survey of Cable: Delta 9151 (or equivalent vessel depending on availability)

Vessels carrying out the subsea cable works will be restricted in their ability to manoeuvre and will display the appropriate lights and shapes. Other vessels are requested to pass at a safe speed and provide a minimum clearance of 500m from the construction vessels during marine operations (COLREGs Rule 16 & 18). Vessels associated with the works will monitor VHF Channel 16 at all times.

Description of Installation/PLIB Operations CLV Global Symphony will be relocating boulders in preparation for cable lay operations and will then lay the Mull to Coll cable. The PLIB operations will be carried out by the Global Symphony immediately after completion of cable lay operations. The nearshore sections of the marine cables will be surveyed using the Delta 9151 (or equivalent vessel). All above-described operations will involve ROV equipment deployed to seabed. The duration of the operations is shown on Table 1. All vessels will be limited in maneuverability. Other vessels should maintain an appropriate and safe distance of 500m when passing the vessels undertaking cable operations and should pass at the lowest speed to avoid vessel wash effects. The vessel will be working 24 hours per day during these operations.

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

Survey operations shall be conducted for Equinor ASA. The survey will involve survey vessel MV Ocean Endeavour conducting hydrographic and geophysical survey operations over sites as described below.  The surveys will consist of multibeam echo sounder, pinger, side scan sonar, magnetometer and seismic equipment. The side scan sonar will be towed up to 300m behind the vessel and 10m above the seabed with the magnetometer towed behind and the seismic equipment will be towed 150m behind the vessel. 

Boundary coordinates are as follows:-

During the survey, the vessel will display the prescribed lights and signals for survey operations and will be monitoring VHF Channels 16 and 12.

Mariners are advised that a hydrographic and geophysical survey will be conducted on the proposed Sheringham Shoal and Dudgeon Extension offshore windfarm on the North Norfolk coast starting around the 1st March 2022 and will continue for 120 days (estimated).

Survey operations shall be conducted for Equinor ASA. The survey will involve survey vessel MV Ocean Researcher conducting hydrographic and geophysical survey operations on sites as described below. The surveys will consist of multibeam echo sounder, side scan sonar and magnetometersonar, and towed magnetometer arrays. The side scan sonar and magnetometer arrays will be towed up to 300m behind the vessel and 10m above the seabed.

Boundary coordinates are as follows:-

During the survey, the vessel will display the prescribed lights and signals for survey operations and will be monitoring VHF Channels 16 and 12.

To provide the required coverage, approximately 15 guard vessels will be used in the period from the 12th April 2022 until the 14th August 2022. Durations at each location will depend on progress of the cable installation, trenching and rock placement operations. Not all the vessels are expected to be used concurrently.

The primary purpose of the guard vessels is to protect exposed cable along the Dogger Bank A Export Cable corridor by monitoring and issuing warnings to marine traffic operating within 6nm of the construction area with a Closest Point of Approach (CPA) < 1.5nm. More specifically, the focus will be on those vessels with potential to be engaging in bottom contact activities such as fishing and anchoring, as these activities pose a risk not only to the exposed cable bundle but also to the vessels themselves.

The guard vessels will be clearly marked and display a highly visible "GUARD" sign on each side. The vessels will operate 24hrs, in all but extreme weather. Exchange of vessels on site will ensure the relevant section of cable is never left unguarded.

In sections where cable protection has been completed, guard vessels will be released and sections will be opened up for fishing or use of other of equipment with seabed intervention. This may not necessarily be in a sequential order from shoreside outwards.

The work will be performed in two Campaigns, starting on the 14th April 2022 and continuing until approximately 2nd June 2022. The work will be continuous, 24 hours a day. Coordinates and chart of the route are provided below.

During the full Cable lay operation (including period when NKT Victoria has left site to pick up the campaign 2 cable) until the cable has been protected by means of burial or rock placement, the construction working corridor will remain closed for any static fishing, anchoring or use of other equipment with seabed intervention.

The first campaign will start with installation of concrete mattress at the Langeled pipeline crossing on the 14th April. The mattresses will be installed by NKT Victoria immediately prior to cable installation. A guard vessel will be in placed at crossing location as soon as the mattresses have been installed.

Starting from the landfall site, The NKT Victoria will then surface lay the export cable in a seaward direction to approx. KP70. After completing the first cable lay, she will leave site to pick up the second cable.

The second campaign will start around the 9th May 2022, with installation of concrete mattresses at the SEAL pipeline crossing. The cable laying operation will be initiated by jointing the campaign 1 cable to the cable in campaign 2, followed by cable lay towards Dogger Bank A Wind Farm. The end of the cable will be temporarily wet stored on the seabed until the installation of the offshore platform and later pull-in in 2023.   

During operations the NKT Victoria 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 1.5Nm separation distance from the Cable laying vessel and pass at reduced speed. fishing gear or other equipment with seabed intervention should not be deployed when approaching the working corridor.

An Offshore Fisheries Liaison Officer will be onboard NKT Victoria to provide support and coordination to fishing vessels, please see contact details below.

In the period between cable lay and cable burial, or protection by rock placement, the cable will be exposed on the seafloor. During this time the cable is sensitive to any external impact and constitutes a snagging risk for anchoring, fishing gear or other equipment with seabed intervention.

To protect the cable in the 500m working corridor, guard vessels will be deployed along the route (described in a separate NtM). The guard vessels will contact vessels approaching within 1.5Nm.

See detailed map on our bulletin website

Pickerill A former Platform Lat: 53° 32’ 57.0875” N Long: 01° 04’ 33.3425” E

The cardinal buoys will be deployed within the Pickerill 500 m zone at the following coordinates:

UPDATE: The latest version of the marine Licence accepts the 4 buoys final location is precisely as above.

The acoustic receivers have riser lines with scientific instruments and extend vertically no more than 2m (LAT). The moorings will be recovered in their entirety.
All enquiries should be made to the Atlantic Salmon Trust Tracking Co-ordinator (lorna@atlanticsalmontrust.org).

If you trawl or dredge up a receiver (see photos), please do not throw it back into the water. Please retain it and contact lorna@atlanticsalmontrust.org to arrange collection.

See detailed map on our bulletin website

See detailed map on our bulletin website

The dive support vessel Isle of Jura using a five-point mooring spread, including anchors, ground tackle, riser chains and mooring cans, continues to work at the DBA export cable HDD exit location. Each mooring can is fitted with a yellow marker light displaying a set flashing sequence The Isle of Jura will remain on station/site during the night and be manned 24 hours throughout.

Dive operations will be carried out from the Isle of Jura. These operations may continue during the hours of darkness. A short safety message will be broadcast on VHF CH16 announcing start and end of dive operations. Flag ‘Alpha’ and the appropriate lights will be displayed during dive operations. Vessels are requested to maintain a 500m safe passing distance at all times.

The MV Pulsar will be carrying out MBES surveys of the seabed and along the pre-cut trenches throughout the dredging activities. The survey gear will be positioned on a side mounted pole and extended into the water. MV Pulsar will make several passes over the area at a reduced speed. MV Pulsar will transit from Bridlington Harbour to the work site throughout the project. Vessels are requested to keep well clear and pass at reduced speed during survey works.

The dredger barge Abeko Server 3 will be carrying out spoil management, trenching and backfilling activities. The backfilling activities will commence once the submarine power cable has been installed. The Abeko Server 3 will remain on station/site during the night and be manned 24 hours throughout. A tug, the Sil Jeske B will remain with the Abeko Server 3 to assist in barge movements/relocation on site and towing to Port when required.

The CTV Celtic Mara will be carrying out crew transfer activities from Bridlington Harbour to the Isle of Jura daily.

All vessels will display lights and day shapes appropriate to their work scope.

See detailed map on our bulletin website

See detailed map on our bulletin website

The equipment will be located as close as reasonably practicable to the coordinates as provided within this Notice to Mariners.

The buoy was successfully deployed the 26th of March and the coordinates for the as laid main anchor position is updated.

Scheduled maintenance is planned in the autumn/winter of 2022, from September onwards.

Unforeseen maintenance may also be required. The mooring design is specific to each SWLB deployment and location. The equipment will be moored through a combination of steel chains, rope and rubber cord to approximately 3000 kg anchor weight at the seabed.

The equipment is an integrated Seawatch Wavescan buoy and ZX 300M LiDAR; the purpose of the equipment is to collect oceanographic and meteorological data using a single platform. The equipment is supplied and charged by an onboard power system which uses methanol fuel cells and solar panels to recharge onboard lead acid batteries.  

In order to minimise the risk to other sea users, the measures listed below will be adopted for this deployment:

The equipment will be equipped with a F1 (5) Y 20s light with 4-5 nautical mile range; the light will be mounted at the top of one of the masts, approximately 4 m above sea level.  

Dunlin Alpha topsides removal decommissioning activities are planned to be undertaken in 2 separate campaigns:

• The initial campaign is planned for April – May 2022 and will involve use of the Heerema HLV "Thialf" to separate and remove a number of platform modules.  These modules will be transported to the Vats facility in Norway for onshore recycling and disposal. 
• The second campaign is planned to commence on or around June 1st and will involve use of Heerema SSCV "Sleipner" to remove further platform modules and then lift and remove the Dunlin Module Support Frame (MSF). These will then be transported to the Vats facility in Norway for onshore recycling and disposal. 

The Dunlin Alpha - Aid to Navigation unit will be turned off at this time and the HLV / SSCV will act as mitigation to reduce navigational risk during this period. A temporary Aid to Navigation will be placed on the installation during any periods where a decommissioning vessel is not in attendance at location (ref: Consent to Locate permit CL/469/2 - attached).

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

A support vessel will escort the USV from the active ports to the port limits. Although the vessel is uncrewed, it is managed throughout the 24hour operation, piloted remotely using 360 degree cameras and other navigational aids.

Name    X-11 Uncrewed  X-14 Uncrewed X-15 Uncrewed

MMSI     232033343        232035680        232035682

Beam      2.2m                2.2m                2.2m

Speed     3.5 knots         3.5 knots          3.5 knots

Draught    1.5m              1.5m                  1.5m

Tonnage   750kg             750kg              750kg

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. 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 Seafarers are asked to avoid contact with the vessel and be aware of the operational area during this period. XOCEAN - Emergency Contact Details: Clodagh McAnerney (Project Manager) +353 87 676 8806 clodagh.mcanerney@xocean.com  JP Kearns (Marine Superintendent): +353 87 051 8601 jp.kearns@xocean.com Kevin Harnett (COO) +353 87 975 3797 James Ives (CEO) +353 87 123 5175

Please be advised that the operations are anticipated to mobilise from the 1st of April 2022 with investigations targeting the site. The works will last for approximately 70 days . The exact survey dates are dependent on mobilisation time, weather and work progress. Note that the vessels will have limited manoeuvrability and it is requested that all vessels operating near the survey vessels maintain a safe distance (at least 500m) and pass at minimum speed.

It is requested that anybody having knowledge of any potential objects submerged or moored on the seabed within the survey area that could be damaged or form a hazard to the survey vessel and its equipment advises Hornsea Three’s Onshore Fisheries Liaison of their position and nature.

Please see attached Notice to Mariners for further details.

This will include ROV, subsea rigging, winching and under-slinging operations carried out from work vessels and heavy lift barges. Throughout said operations, these vessels shall be restricted in their ability to manoeuvre and shall be marked/ lit as such. A wide berth is requested.

Prior to commencing operations, an all-ships safety call shall be broadcast on VHF Ch16 confirming vessels on site and times of operation. All vessels will be contactable on VHF CH16, DSC70 for further information or Working Channel VHF 17.

The work will be carried out by Keynvor Morlift Ltd, Unit 15, Falmouth Wharves, Falmouth, Cornwall TR11 2TF. Tel:+44 (0)7791642452  Fax: +44 (0)845 014 9735 info@keyvormorlift.co.uk  www.keynvormorlift.co.uk.

See detailed map on our bulletin website

NnGOWL is developing the NnG Offshore Wind Farm, jointly owned by EDF Renewables and ESB, which is located in the outer Firth of Forth, Scotland. The NnG wind farm area is 15 km east off Fife Ness and 29 km from the East Lothian coastline and covers an area of 105 km2

The wind farm consists of 54 no. wind turbines (WTGs) and 2 no. Offshore Substation Platforms (OSPs), with a total capacity of approximately 45 0MW. Water depths across the offshore wind farm area generally range from 40 to 60 m below LAT. The generated power will be transmitted to the grid via two subsea export cable circuits which will reach landfall at Thorntonloch Beach, East Lothian, Scotland. Specific details and location of activities within the Wind Farm Area and Export Cable Corridor will be provided via subsequent notices as work progresses.

Buoyage

Five special markers are now in position:

Four cardinal buoys are due to be deployed the week commencing 16th March. Planned deployment locations

A steel chain will be connected to each marker buoy, and the chain will be present through the water column, connected to an anchor placed on the seabed.

See detailed map on our bulletin website

Period: From 1 April until the notice is canceled in Efs, autumn 2022. Precautionary area: (1)

Vessels: "Skandi Skansen" (MAXR6): Installation of anchor system 1 April - 1 June.

"Skandi Iceman" (LFMY): Towing and installation of floating wind turbines from approx. 15 May until autumn 2022.

Note: To avoid damage to unprotected equipment on the seabed and in the water column, as well as on fishing gear, all fishing with bottom gear within the precautionary area is to be avoided. The area will also be monitored by the Equinor Operations Center, which can be reached on VHF channel 14 or on telephone +47 55 14 32 78. Until completion, this will be an extended precautionary area. We will provide an updated Notice to Mariners regarding the permanent precautionary area that will be established when the wind farm installation is completed. Charts: 304, 307.

See detailed map on our bulletin website

See detailed map on our bulletin website

On behalf of Seagreen Wind Energy Ltd, Petrofac will hook-up and commission the Seagreen offshore sub-station platform. To assist in this activity the Jack Up Barge Borr Ran will be positioned next to the sub-station platform to act as accommodation for those personnel involved. The Borr Ran Jack Up Barge will be assisted into position by an anchor handling tug and two support tugs. During final positioning a four-point anchor spread will be utilised. Once the barge is positioned the anchor spread will be removed. During the period the anchor spread is deployed there shall be a 750 metre exclusion zone centred around the sub-station platform, this zone shall apply to all vessels other than those involved in the operation.  

See detailed map on our bulletin website

See detailed map on our bulletin website

Mariners are advised that maintenance works on the five acoustic monitoring devices in an around the boundaries of the Seagreen Offshore Wind Farm will be undertaken. The Marine Scotland Science vessel Alba na Mara plans to service the 3 monitors outside the site boundary this evening 14th of March. The 2 monitors inside the site boundary will be serviced tomorrow, 15th March. These acoustic monitoring devices collect real-time noise measurements for a period of 36 months. The devices will be inspected and maintained at least every four months.

On behalf of Seagreen Wind Energy Ltd, MHI VestasOffshore Wind will commence the installation and commissioning of 114 wind turbine generators.There shall be four vessels utilised during thisoperation.The Jack up Vessel Wind Orca will be the main installation vessel. Wind Orca will transport the WTG components to site, jack up to the required height next to the foundation structure and install the WTG components.The Service Operation Vessel (SOV)Acta Centaurus will provide accommodation for the WTG commissioning technicians. Personnel will utilise the Acta Centaurus’s walk to work gangway system to access the WTG structures for commissioning activities.Two Crew Transfer Vessels(CTV’s), HST Euan and the HST Harri will support the above two vessels during installation and commissioning activities.The above vessels are expected to arrive at the Seagreen site on or around the 5thof December, WTG installation activities shall continue until late 2022.

See detailed map on our bulletin website

Ithaca Energy (UK) Ltd is planning to use the COSLPioneer to re-enter the currently suspended appraisal well (29/10B-8) to complete this as a production well (29/10B-P2W) at the Abigail drill centre.  The activity will last 74 days (including anchor pre-lay).  A guard vessel will be on location from the pre-laying of the anchors.

The field lies within the United Kingdom Continental Shelf (UKCS) Block 29/10, approximately 233 km south-east of Peterhead, 36 km from the UK/Norway median line and 13 km west of the Ithaca Energy (UK) Limited owned floating production facility, the FPF-1.

See detailed map on our bulletin website

**Update** The temporary buoy has been moved to a new location to tyhe South West of the work site while works are in progress

On completion of all the nearshore works, estimated for end July 2023, the temporary marker buoy will be removed from site.

This NtM supersedes LF500013-MIP-DOG-NOT005 Rev02, issued on the 26th Aug 2021

The marker buoy characteristics are: Yellow Special Mark, light pattern: Fl(Y)5s

Mariners are reminded to navigate with caution, keeping a safe passing distance from the temporary marker buoy and keeping a continuous watch on VHF Ch. 70/16 when navigating the area.

The HCF operations will commence around  8th March 2022 following the interface activities .The HCF campaign duration is 142 days and finish approximately 25th July 2022.

The navigation buoys are yellow pillar shaped special marks, exhibiting yellow St Andrews cross day shapes. The buoys are each fitted with a yellow navigation light with sequence: Fl Y 5s

The wave buoy at site MO2 is a 1.1 m diameter yellow spherical buoy fitted with a flashing antenna with sequence: Fl(5) 20s

It is advised to give 300m clearance to each mooring location
 

Rig are protected by a 500m safety zone and some may have anchors extending beyond this zone. 

The Maersk Innovator Drilling Rig is due mobilise from Denmark to the Catcher Area in February 2022 and should be on location at the Catcher North drilling template in early March 2022. 

The workscope comprises of several ROV Construction Support Vessels (CSV) performing the seabed clearance of the risers, Mid Water Arch, Riser Base Structure and surface laid spoolpieces, pipelines and umbilicals up to the point of burial.

Initially an ROV Construction Support Vessel (CSV) will perform the recovery of the concrete protection mattresses from over the surface laid spoolpieces, pipelines and umbilicals and will perform the cuts on these items up to their point of burial at full trench depth or start of rockdump. This will be followed by an Anchor Handling Tug (AHT) which will recover the Flexible risers and the surface sections of the flowlines and umbilicals before releasing the Mid Water Arch (MWA) and floating it to the surface. The MWA will then be towed to Lerwick in the Shetland Isles for disposal.

Finally another CSV will be in field to perform the recovery of the MWA clump weights, Riser Base Structure, rigid spoolpiece and pipeline sections along with any remaining concrete protection mattresses and grout bags. The 500m zone will then be surveyed for debris, the debris will be recovered and a final 500m zone MBES clearance survey will be performed to confirm the 500m zone is clear of any oil field related debris and that no snag hazards remain. An over trawl survey will then be performed by the SFF to confirm there are no snag hazards before issuing a seabed clearance certificate and opening up the area to fishing activity.

All the vessels will be positioned within the ex Northern Producer FPF 500m Zone during these activities with the AHT also towing the MWA to Lerwick along a predetermined tow route.

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.

See detailed map on our bulletin website

See detailed map on our bulletin website

As laid anchor pattern with rig in position attached, notice will be updated after rig departure to show only the remaining equipment.

At this location, the export cables are buried to the required depth and the trawl gear did not pass over any rock protection or any known boulders, as such the cause of the peak tension is unknown. This will be investigated by the project at the earliest available opportunity.

A-2-Sea Solutions Ltd will be operating vessel 'Noortruck' on a 24-hour basis, sailing survey lines between 5-10 knots.

Equipment will not be towed and only a hull mounted multibeam echosounder will be used.

Vessel Noortruck will exhibit the lights and shapes prescribed by the International Regulations for Preventing Collisions at Sea and will maintain a listening watch on VHF Channel 16.

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

The application is for the Active Dredge Zone in Area 464 to be removed and the Active Dredge Zone in Area 458 to be extended by an equal extent.

The changes are planned to come into effect after 22/02/2022.

See detailed map on our bulletin website

See detailed map on our bulletin website

10 mooring line trenches, varying in length from 70m to 180m; up to 8 metres wide and up to 9 metres deep. These trenches are steep-sided (in many cases vertical, cut into the clay seabed).

10 anchor scars, consisting of shallow trenches (20-90 metres long), shallow-sided depressions (less than 2 metres deep) but with areas of significantly disturbed seabed, including clay boulders up to 3 metres in size.

See detailed map on our bulletin website

The 7 units will have the following equipment:

Units 1, 3, 4, 5, 6 & 7 - Seabed Frame with attached acoutstic release mechanism & surface navigation buoy within 150m of the seabed frame

Unit 2 - Seabed Frame with attached acoutstic release mechanism & surface navigation buoy within 150m of the seabed frame. This unti will also have a second surface buoy attached to the seabed frame to measure additional information.

It is advised to give 200m clearance to these units

The approximate dimensions of the Debris Cap is 4.5m x 3.9m x 1.4m with a weight of approximately 3.5 tonnes. It is not known whether the Debris Cap is lying within a 500m zone of the well. A 200m x 200m area centred on the well has been searched, with no sight of it. Therefore the exact location of the Debris Cap is unknown. The loss of the Debris Cap leaves the NW Schooner wellhead more vulnerable to snagging from trawler/fishing nets. The approximate size of the tree with over trawl legs deployed is 7.8m x 7.8m x 6m high.

See detailed map on our bulletin website

Please find attached a chart showing the results of the Greater Gabbard OFTO export cable survey. The chart lists the changes to the exposures on the three export cables, on the inshore section between KP 3 and KP 5 with a free span remaining around KP 4. Between KP 36 and KP 38 there are some exposed sections as the cables enter the site. In addition, although listed as exposures on the chart, there are areas of shallow burial at KP10 and a cable exposure on the interconnector cable within the site.

The exposed/shallow burial areas are shown as the coloured dots on the cable route highlighted in a black box.  Equitix (Greater Gabbard OFTO) have asked that all Fishermen operate with caution when fishing anywhere on the cable route and particularly the areas that are shallow buried around KP10.’

Coordinates of exposed/shallow burial areas are shown on the attached chart.

The OFTO is updating its risk assessments to determine the extent of remedial measures that may be required. Equitix intend to provide an update on remediation after the risk assessment exercise is complete.’

The guard buoys are yellow pillar shaped special marks, exhibiting a yellow St Andrews Cross day shape and radar reflector.  The buoys are each fitted with a yellow light, flash sequence: Fl (5) Y 20s 

The metocean buoys are 1.1 m diameter spherical buoys, fitted with a navigation light, flash sequence: Fl (5) Y 20s. 

Further details, including vessel informaiton, will follow ahead of deployment operations. 

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

The Shetland HVDC link is a critical electricity transmission link and will form part of the electrical transmission grid that is essential to the transport of renewable energy between the locations where it is generated and areas of demand, and the delivery of both Scotland’s and the United Kingdom’s 2030 climate change targets. As part of the installation schedule Horizontal Directional Drilled (HDD) exit points have been installed at Noss Head by NKT, on behalf of Scottish Hydro Electric Transmission.

The HDD exit points are located approximately 400m offshore in around 20m depth of water. This Notice is issued to make mariners aware of the presence of three ducts protruding from the seabed at this location.

Three steel pipe ducts have been installed with trajectories that emerge from the seabed around 400m offshore. The ducts have been pushed out from each of the three HDD exit points and extend up to 4m into the water column at an angle of approximately 9º to the horizontal as shown in the diagram and illustrations within the attached Notice to Mariners.

The HDD installation operations are now complete, and the moorings and anchors used to assist with diving operations for the HDD installation activities have been fully recovered. Therefore, the HDD exit point area is no longer identified by marker buoys.

It is recommended that mariners make note of the HDD duct locations and remain vigilant of the seabed protrusions until June 2022, when further installation works are scheduled.

See detailed map on our bulletin website

See detailed map on our bulletin website

See detailed map on our bulletin website

The LiDAR buoy will measure the wind conditions to provide valuable meteorological data to the offshore community that is needed for offshore wind resource characterisation

All locations referred to are outlined in Table 1 and displayed Figure 1 within the Notice to Mariners (provided as an attachment to this notice). These locations are all within the Berwick Bank Wind Farm (BBWF) in the outer Firth of Forth on the east coast of Scotland.

Expected arrival on site is 5th to 22nd November 2021 with the works completed the same day, weather conditions permitting. Therefore, we would like the validity period for this Notice to Mariners to be the 01 November 2021 – 30 November 2022 to allow for any eventualities during installation operations and also to cover any ongoing O&M activities throughout the deployment period.

On behalf of Seagreen Wind Energy Ltd, Seaway 7 will install grout to the Wind Turbine Generator foundation suction caisson voids within the Seagreen Site Boundary. The vessel EDT Hercules will transport the grouting mix to site and set up at the requisite foundation location. A grout hose will be connected to the suction caisson with the grouting mixture being injected into the caisson void. A remotely operated vehicle (ROV) will also be utilised in this operation.

See detailed map on our bulletin website

The Northern Producer FPF has been removed from it’s moorings and towed to port for decommissioning but the subsea assets within the Northern Producer FPF 500m zone will remain in place on the seabed and could pose a snag hazard to fishermen therefore the Thistle Alpha Platform ERRV will act as a guard vessel until the 500m zone clearance is performed in 2022.

This includes the 8 No Risers draped over the Mid Water Arch (MWA), the MWA Clumpweight Guide Frame, the Riser Base Structure (RBS) and the surface laid pipelines / Umbilicals.  The MWA will remain in the water column at a depth of 112m and will remain tethered to the seabed via the clumpweight guide frame. The risers will remain draped over the MWA with one end on the seabed and the other end will remain connected to the RBS so that they remain stable. The existing stabilisation mattresses will remain in place over the surface laid pipelines/umbilicals.

On behalf of Seagreen Wind Energy Ltd, Seaway 7 will install seabed scour protection rock to the foundation structures within the site boundary. The Flexible Fall Pipe Vessel (FFPV) Bravenes will transport and install the rock on the seabed using its flexible fall pipe system. This allows the scour protection to be installed with a high degree of accuracy. An ROV at the end of the fall pipe will be utilised to control the flow of rock to the seabed.

See detailed map on our bulletin website

In conjunction with the commencement of wind turbine generator foundation installation activities, Seaway 7 will deploy a site Guard Vessel on behalf of Seagreen Wind Energy Ltd. The vessel will be deployed on or around the 01st October and will make six hourly VHF radio broadcasts containing information regarding the Seagreen development, including installation activity, safety zone information and site demarcation buoyage information. The first guard vessel to arrive will be the Renown FR246.

See detailed map on our bulletin website

See detailed map on our bulletin website

Fugro have deployed a SeaWatch LiDAR Buoy (SWLB); this is a sea state measurement instrument (referred to as ‘the equipment’). The deployment location is within the UK Sector of the North Sea off the north coast of Scotland.

• The equipment was deployed on 29 August 2021, and will be deployed for approximately one year.
• The equipment's location is provided within the attached Notice to Mariners.
• Scheduled maintenance of the equipment is planned every six months, but unforeseen maintenance may be required.
• The equipment has been moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.

The Seagull Field is located on UK licence P1622 Block 22/29C. 17km south of the Eastern Trough area Project (ETAP) Central Production Facility (CPF). Neptune will develop the Seagull reservoir as a subsea tie‐back to existing seabed infrastructure over the BP operated ETAP CPF. The development is high pressure and high temperature and Neptune is the Operator for the subsea development. Neptune will also drill and complete the Seagull Wells and shall retain overall Project responsibility.

The Seagull development will require installation of new subsea equipment as follows: Four Xmas Trees; a 4 slot manifold; a 17km control umbilical (including hydraulic, electrical and chemical supplies) direct from ETAP to Seagull; a 5km 10” production pipeline; a 5km 3.5” wash water pipeline from Seagull to the existing Egret manifold; and a Wye manifold adjacent to the existing Egret manifold, through which the new Seagull production pipeline will connect with the Heron cluster pipeline system connected back to the ETAP CPF. From ETAP CPF Seagull oil and gas will be exported to shore through the GAEL and FPS pipeline systems to the Kinneil Terminal onshore.

We already have an ODA established covering the Seagull drill centre and the Egret manifold and would like to request to extend the ODA to incorporate the entire Seagull works area. The extended Offshore development area will be required commencing from September 2021 ‐ March 2023.

See detailed map on our bulletin website

Significant free-spans have been identified along the PL1043 Dunbar to Alwyn pipeline : Please exercise caution in these areas

No overtrawlability trial done yet, rough ground may be experienced.

No overtrawlability trial done yet, rough ground may be experienced.