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Survey - White Cross Offshore Wind Farm



From the 29th of May 2022, N-SEA will be conducting geophysical, (limited) UXO and environmental surveys within the area. The offshore works will be completed by N-Sea personnel on the survey vessel ‘Braveheart Spirit’ and the ‘Geo Focus’.


Please be advised that from the 29th of May 2022, N-SEA will be conducting geophysical, (limited) UXO and environmental surveys within the area provided. The survey consists of an offshore windfarm location, and its export cable route corridor. The geophysical and UXO survey will employ MBES, SSS, High-resolution Sub-Bottom Profiler, Single Channel Sparker and Magnetometers. The environmental survey will acquire drop down video footage and grab samples. Sparker operations are limited to the OFW only.

 

The offshore works will be completed by N-Sea personnel on the survey vessel ‘Braveheart Spirit’ and the ‘Geo Focus’. Full vessel details are presented in the Notice to Mariners.

 

The ‘Geo Focus’ will arrive end of May in the field, while the ‘Braveheart Spirit’ is expected to join operations mid June.

All environmental sampling will be executed by N-Sea subcontractor Ocean Ecology.

 

The survey operations involve towed survey equipment (SSS, Magnetometer and Sparker), and no equipment will be left on the seabed.

This notification is intended for circulation to all interested parties undertaking or managing activities in the vicinity of the planned survey works.  If you would like further details regarding the surveys please contact the N-Sea project manager using the contact details at the head of this communication.

 

Liaison and General Operational Principles

  1. The survey contractor will ensure advance notice of survey works is provided to all marine users.
  2. As near-shore areas have the potential to hold higher densities of static fishing gear, all survey operations will be undertaken during daylight hours.
  3. Where considered appropriate, a Fisheries Liaison Officer will be used to provide advice to the survey contractors and facilitate liaison with the fishing industry.
  4. During liaison, should areas of high fishing density be identified, best efforts will be made to modify survey plans (either the location of survey sites or timing of operations) to avoid damage to both survey and fishing gear.
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Survey Operations - Morgan (North) & Mona (South) offshore wind farms project - Eastern Irish Sea



Nearshore Survey Operations - Eastern Irish Sea. Great Orme / Colwyn Bay - South Blackpool / Lytham St Annes


Attached is a Notice to Mariners issued by Marine Space concerning the GEOPHYSICAL, GEOTECHNICAL AND ENVIRONMENTAL (BENTHIC) SURVEYS of the proposed nearshore Export Cable corridors for the MORGAN and MONA ROUND 4 WIND FARM PROJECT. PLEASE READ THE NOTICE

 

The 14 meter survey vessel ‘TITAN ENDEAVOUR, currently in Barrow waiting on weather, will carry out survey operations of the Nearshore Area off SOUTH BLACKPOOL / LYTHAM ST ANNES as soon as weather and conditions improve. (picture of ‘TITAN ENDEAVOUR’ on page 2 of the attached notice)

 

This survey involves the use of Multibeam Echo Sounders (MBES), Sub-bottom Profiler (SBP), Side Scan Sonar (SSS) and Magnetometer equipment some of which will be towed approx. 50 meters astern of the survey vessel. It will also involve the lowering of equipment to the seabed to acquire environmental and geotechnical samples i.e. a Drop Down Camera with Grab Samplings collected at approx. every 1Km.

 

THEREFORE A WIDE BERTH, MINIMUM 500 METERS, IS REQUESTED AT ALL TIMES AROUND ‘TITAN ENDEAVOUR’ AND PASSING VESSELS ARE REQUESTED TO REDUCE SPEED IF POSSIBLE.

 

PLEASE NOTE

The survey will only cover areas inshore of 15 meters water depth and to approx. 2 meters water depth, the extent of the two planned survey areas are shown as two blocks on the small chartlet on page 3 of the attachment. The GREAT ORME / COLWYN BAY one is brown - The SOUTH BLACKPOOL / LYTHAM ST ANNES one is green , the co-ordinates are shown on pages 3 & 4. However it should be noted that survey operations will only take place within a 1.5Km wide corridor within each survey area or block

 

IT IS NOT INTENDED, OR EXPECTED, FOR THIS SURVEY TO INTERFERE WITH ANY FISHING OPERATIONS BUT IF ANY FISHERMAN HAS ANY GEAR DOWN IN THE AREAS OF SURVEY COULD THEY PLEASE MAKE SURE THAT THE GEAR IS CLEARLY MARKED AND SEND ME THE LAT. AND LONG. POSITIONS SO THAT I CAN PASS THEM TO THE SURVEY BOAT, OR THEY CAN CONTACT THE SURVEY BOAT DIRECT.

 

ANY INFORMATION GIVEN WILL BE TREATED IN THE STRICTEST CONFIDENCE.

 

PLEASE READ THE NOTICE and do not hesitate to contact me if you are unsure of anything or require any further information

 

A listening watch will be kept on VHF Channels 16 & 12 and ‘TITAN ENDEAVOUR’ can be contacted for information relating to vessel movement only.

 

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.

 

Regards  :  Tom Watson

Tel……..…..Home 01253 875565

                   Mobile 07903 173 624

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External Dive Works - Greater Gabbard Offshore Wind Farm



From 01st July 2022 for a period of approx. 5 weeks, external dive works will be conducted at the Greater Gabbard Offshore Wind Farm on 5 wind turbines and ROV works an 10 locations. Site work is planned to commence around 01st July 2022 using vessel MCS Kaver call sign:2GMB8 (subject to weather delays) and will be undertaken as weather permits, expected completion by 15th August 2022.


Description of works:
Works will include positions around the cable routes and entering the 50m exclusion zone on the following assets only.

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Disconnection of KIN-03 & Tow to quayside - Kincardine Offshore Windfarm



The floating wind turbine KIN-03 will be towed to a quayside facility for maintenance. The tow is due to commence on the 4th /5th July 2022. The site will have a guard vessel Genesis BF 505 call sign: MSDK3 on site from midnight on Sunday 3rd July 2022. The Guard vessel will be on site for 9 to 10 days.


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Geophysical and Unexploded Ordnance Survey



Seaway 7 will conduct a geophysical/unexploded ordnance survey within the boundaries of the Seagreen Offshore Wind Farm. On behalf of Seagreen Wind Energy Ltd. Seaway 7 will commence a geophysical/unexploded ordnance survey on four spare asset locations within the boundary of the Seagreen site. The survey vessel Mersey Guardian is expected to arrive at site on or around the 25th of June to commence calibrations and survey operations.


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Seagreen Offshore Windfarm - Diving Operations



Diving Operations will be carried out on SN-M10 foundation structure.


On behalf of Seagreen Wind Energy, Seaway 7 will conduct diving operations on SN-M10 wind turbine generator foundation structure. Operations will be conducted from the Dive Support Vessel Seven Kestrel which will arrive at the Seagreen site on or around the 29th of June to commence operations. During diving operations there shall be a strict 500m safety zone around the Seven Kestrel, all vessels are requested to give Seven Kestrel a wide berth at all times

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Offshore Construction - Dogger Bank A Offshore Wind Farm



Offshore Construction of the Dogger Bank A Offshore Wind Farm commenced on the 18th of March 2022. The development of the windfarm is made up of several elements - current ongoing elements  are described below in the 'full notice' and in the attached file. This notice will be updated weekly, giving information on the progress and resources involved in the offshore project.


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

 

Export 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. 

 

Export Cable Guard Vessels

Guard vessels are deployed along the export cable route.

 

Inter Array Cable Boulder removal and route clearance

The Offshore Supply Vessel, WORLD PEARL, will perform the Route Clearance operations on Dogger Bank B 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 vessel Simon Stevin will supply, transport, and install scour protection at 95 monopiles foundations on Dogger Bank A.

 

The Offshore Supply Vessel, KAMARA, will perform UXO Inspection operations within Dogger Bank A and Dogger Bank B Array construction areas

 

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

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Temporary marker buoy - Export cable ducts of the Dogger Bank A and Dogger Bank B export cables



This notice to mariners (NtM) relates to the location of a temporary marker buoy positioned between the export cable ducts of the DB A and DBB export cables


This revised notice to mariners (NtM) relates to the location of a temporary marker buoy positioned between the DBA and B export cable ducts.

 

The Nearshore works for DBA export cable have now been completed, with the cables and cable ducts now fully buried. The temporary marker buoy has now been moved back to a position between the DBA and DBB duct exit points. The buoy will remain in this position until the nearshore works for DBB commence in 2023.

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 Rev03, issued on the 19th December 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.

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Guard Vessel Deployment - Dogger Bank A Export Cable



Burial of the Dogger Bank A Offshore Windfarm Export Cable is ongoing. Guard vessels have been deployed to protect the cable bundle until the cable is adequately protected by means of trenching or rock placement. Update - Guard Zone 8 & 9 reached approved Dept of Burial. Guard Vessels have been released.


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.

 

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Dogger Bank B Inter-Array Cables Route Clearance



The Offshore Supply Vessel, WORLD PEARL, will perform the Route Clearance operations on Dogger Bank B Inter-Array Cables routes. The works will be performed in a single campaign, commencing on the 29th of June 2022 and continuing until approximately 3rd of August 2022. The works will be continuous, 24 hours a day.


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.

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Construction of Wind Farm - Triton Knoll



Activities related to the development of the Triton Knoll wind farm continue, as detailed below. For background information visit: http://www.tritonknoll.co.uk Mariners are advised that the asset installation phase of the Triton Knoll OWF is now complete. Post-installation commissioning and repair activity is continuing and it is anticipated that construction vessels required for repair work will be returning to site occasionally in early 2022 and further notices will be issued accordingly.


Mariners are advised that the following vessel will be commencing operations at the Triton Knoll Offshore Wind Farm (TKOWF) as outlined below:

 

The following vessel has commenced post construction survey operations within the Triton Knoll as outlined within previously issued NtM's 

 

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Cerys Line Utlility Vessel MGMR5 232025503 8228842 Grimsby 13/06/2022

 

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:

 

The following vessels continue to be active at the Triton Knoll as outlined within previously issued NtM's 

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Windcat 11 Crew Transfer Vessel 2BIS9 235066459 N/A Grimsby 14/12/2020
Esvagt Havelok Service Operations Vessel OYFR2 219026496 9878981 Grimsby 25/09/2021
Seacat Courageous Crew Transfer Vessel 2IDC9 235108711 9758052 Grimsby 01/05/2022
Seacat Intrepid Crew Transfer Vessel 2HWU6 235107284 9758040 Grimsby 05/05/2022
Jacobus Utlility Vessel MIVU7 232034467 9910284 Grimsby 17/06/2022
             

 

All vessels can be contacted via VHF channel 16 when operational in field.

 

Activities carried out over the previous 7 Days:

  • Ongoing activities at Offshore Sub Station Platforms East & West continues.
  • Ongoing activities at Offshore foundations continues.
  • Wind Turbine Generator Service and maintenance continues infield.
  • Arrival of Cerys Line and commenced Subsea Surveys
  • Arrival of Jacobus and commenced ROV operations

Activities planned for the next 7 days:

  • Ongoing activities at Offshore Sub Station Platforms East & West continues.
  • Ongoing activities at Offshore foundations continues.
  • Wind Turbine Generator Service and maintenance continues infield.
  • Onging Subsea Surveys undertaken by the Cerys Line
  • Onging ROV operations undertaken by the Jacobus

*** Note ***

 

All 90 WTG's have now been fully installed, whilst WTG commissioning and service continues.

All Export Cables are fully installed/buried and need to be deemed live/energised.

All Inter Array Cables are fully installed and buried and need to be deemed live/energised.

Whilst the main installation works have been completed, major construction commissioning works are continuing.

 

*** Note ***

 

Whilst TKOWFL is reopening the site to fishing from the 14th December 2021, TKOWFL kindly request that all fishermen intending to fish within the boundaries of the Triton Knoll wind farm, contact the Triton Knoll control room prior to entering and exiting the field, and inform them of their fishing intentions.

 

This precaution is requested to safeguard all vessels operational at the TKOWF site (including fishing vessels) and your cooperation, to ensure the safety of all parties is appreciated. The following contact details should be used when notifying the Triton Knoll control room of fishing activity:

 

Control Room Manager: Derek Whyte

Radio: VHF channel 16

Callsign: TK MCC

Phone: +44 1793 896250

Email: tkcr@rwe.com

 

*** Note ***

 

Application of Triton Knoll Wind Farm Safety Zones During Construction

The Secretary of State has granted the Application of Safety Zones on the Triton Knoll Wind Farm Project as follows:

  • 500m “rolling” safety zones around any structure where construction is being undertaken (as indicated by the presence of construction vessels).
  • 50m pre-commissioning safety zones surrounding partial structures or completed structures prior to commissioning.

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)

NtM 016-2022 (18th May 2022)

NtM 017-2022 (08th June 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.

 

Description of Target Latitude Longitude

Water Depth

(LAT) Metres

Required Exclusion

Zone (Metres Radius)

Archaeological - The item is thought to be an air-delivered bomb.  It appears to be in a stable condition and is resting on the seabed.  Marine growth and concretion cover the body, indicating it has been in situ for a significant duration. The tail section of the bomb is missing, which is typical of unexploded bombs from WWII found in these circumstances and there is a significant hole in the case. The dimensions and characteristics gathered are consistent with a 500kg German bomb. Considering the state of the bomb the Net Explosive Quantity of the bomb is likely to be <5kg. 53°31'50.249"N 00°47'45.908"E 20 10
Archaeological - The item is thought to be an air-delivered bomb.  It appears to be in a stable condition and is resting on the seabed.  Marine growth and concretion cover the body, indicating it has been in situ for a significant duration. The tail section of the bomb is missing, which is typical of unexploded bombs from WWII found in these circumstances and there is a significant hole in the case. The dimensions and characteristics gathered are consistent with a 500kg German bomb. Considering the state of the bomb the Net Explosive Quantity of the bomb is likely to be <5kg. 53°31'49.895"N 00°47'45.115"E 20 10
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White Cross - Floating LiDAR system deployment



Please be advised that from the 09th of July 2022, one Floating LiDAR system is to be deployed to the Celtic sea to record wind and metocean data.


Please be advised that from the 09th of July 2022, one Floating LiDAR system is to be deployed to the Celtic sea to record wind and metocean dataPosition and coordinates where the FliDAR buoy will be deployed are provided in the table and charts below. The buoy will be deployed from Padstow harbour. The buoys will be in situ for 12 months (but up to 24 months).

 

The FLiDAR equipment will undergo regular scheduled maintenance during the operation period estimated to be 4 times a year, further notice to mariners will be issued confirming the dates and maintenance activities.

 

Following system checks onshore, the buoys will be either towed into position by a small works vessel or be deployed from a vessel through lifting of the buoys from the deck into the water. Key stages of the deployment are listed below:

1. unit delivered by road and assembled ashore;

2. unit, concrete sinker and mooring system loaded onto multipurpose vessel and taken to site;

3. concrete sinker and mooring system deployed from the vessel; and

4. unit deployed from the vessel and then attached to the mooring system.

 

Floating LiDAR Description

The floating lidar buoy is approximately 5m in length, 3m wide and 4.75m in height, with an anchor (dead man) weighing 2500kg. The system is comprised of the measurement buoy itself and a site-specific single catenary mooring.

 

Liaison and General Operational Principles

  1. The survey contractor will ensure advance notice of the installation works is provided to all marine users and the location of the buoy once installed is provided.
  2. Where considered appropriate, a Fisheries Liaison Officer will be used to provide advice during installation of the buoy and during the full deployment period of 12 months. Name: Rhys Kibble         Email:  rhys.kibble@brownmay.com          Telephone: +44 (0) 7809 337 349  

Programme

Deployment Date

From the 9th July up to 23rd July 2022 dependent on weather conditions

This date is subject to weather permitting, and therefore there may be the potential for an extension to the work duration.

Operational period

1 Year (up to 2 years from)

 

 

Safety

Lighting System

Colour: Yellow

Location: Top side of the FLS

Height of light above water: 3 metres

Flashing Intervals ODAS FI(5) 20s (range 5 nautical miles)

 

24 Hour Emergency Contact Numbers:

AKROCEAN

Mathieu DADEN +33 (0) 6 78 03 72 15

Control room VALEMO +33 (0)5 47 30 20 60

 

EMERGENCY

112 / 999 ask for the Coast Guard

VHF Channel 16

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Site Survey and Target Investigation - Sofia OWF Export Cable Route & Array



All Mariners are advised that vessel Go Electra will commence mobilising on or around 30th June 2022 in readiness for commencing site survey and UXO target investigation works from early July 2022. The works will entail two phases.


Phase One: Investigating seabed targets that have the potential to be UXO or archaeological items of interest by means of a Work Class ROV (WROV) along the proposed route of the Export Cable and within the Sofia Array (Foundation and Wind Turbine Generator locations). - Go Electra will visit the location of the target to identify the nature of the target. - In the event UXO or archaeological targets are found both will be fully investigated and left in situ. - In the event there is debris that could cause disruption to site works the debris will be moved to a safe area.

 

- Phase one will be undertaken 24 hours per day.End of Phase One activities. Vessel returns to port for reconfiguration for Phase Two activities.

Phase Two: Removal / Relocation / Detonation (where required).

 

Phase two will be undertaken during daylight hours only. A UXO target will be assessed by Explosive Ordnance Disposal / UXO experts onboard the vessel. The condition, state of burial, size, etc. of the target is assessed. The options for UXO clearance are limited to: - Disposal (detonation) of the UXO. - Relocate the target using remote means to a suitable location. - Leave the UXO As-found.Note: Prior to any disposal by detonation, the following warning protocol shall be followed by the Go Electra: At Local Time minus four hours, thirty minutes and ten minutes, safety messages will be transmitted on VHF Channel 16 and as designated by the regional VTS authority if required. - Securite x 3, All Ships x 3. - This is Vessel “Go Electra” x 3. - I am conducting Explosive Ordnance Disposal Operations. - There will be a controlled underwater explosion in position: Lat:……… Long:……. At: (Local Time)

- All Vessels are requested to keep clear of position by one Nautical Mile. - This is Vessel “Go Electra”

 

NOTE: The final ten second countdown leading up to the detonation will also be transmitted on VHF Channel 16. It is always requested that all vessels maintain a minimum of 500m separation distance from the Go Electra, adhere to Collision Regulations and pass at reduced speed during phase one works when exhibiting the shapes / lights identifying the vessel as Restricted in her Ability to Manoeuvre. During phase two works, a minimum of one Nautical Mile clearance is requested when detonation activities are taking place as outlined by the above safety broadcast on VHF. Go Electra shall be supported in her activities by the presence of Guard Vessels named “Atlas B” and “Moremma”  

Note: - Fishing gear shall not be deployed within 500m either side of the centre line as detailed by the coordinates of the works area. - Go Electra will frequently deploy two Met-Ocean Buoys within 500m either side of the line created by the coordinates of the works area. The latest positions of the Met-Ocean Buoys can be requested locally from Go Electra. - During Phase Two works, Go Electra shall be deploying noise monitoring equipment on the seabed to support the works. The positions of the noise monitoring equipment can be requested locally from Go Electra.

 

The following vessels will commence operations on the Sofia OWF project, as detailed within project Notice to Mariners;

 

Vessel Name Vessel Type Call Sign MMSI Number Length Beam Draught Tonnage IMO Number
Go Electra Survey & Clearance Vessel V7ZR6 538005197 79.67m 16.4m 5.6m 4071 9545481
Atlas B Guard Vessel MPUD3 235001670 21.8m 5.2m 3.0m 173 8792415

Moremma

Guard Vessel MKHC6 235007170 22.95m 7.07m 3.0m 172 9545481

 

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Floating LiDAR buoys & metocean buoys - Morgan & Mona



Metocean and floating LiDAR instrumentation have been successfully deployed within the Morgan and Mona project sites.


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 now been successfully redeployed and will remain on location until planned recovery approximately November 2022. As-laid coordinates have been updated for the metocean equipment, following unplanned works which were undertaken during mid-June.

 

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 the attached NtM. The AIS on the Mona floating LiDAR is not currently operating, but all other safety measures remain active and functional; repair of this fault is planned for early July.

 

The previous Notice to Mariners indicated that an additional mooring was planned to be deployed at the Morgan site, however this is no longer planned.

 

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.

.

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.

 

Morgan

Name: Fugro Buoy WS188

MMSI: 992351368

 Mona

 Name: Fugro Buoy WS187

 MMSI:  992351369

 Morgan

 Name: Morgan 01

 MMSI: 992351367

 Mona

 Name: Mona 01

 MMSI:  992351366

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Pre-Construction Survey Greenlink Interconnector



Pre-Construction Geophysical Survey of the Greenlink Interconnector Route. The survey works will be conducted by the Geo Ocean V (call sign 5BWE3/MMSI 253754000): a multi-disciplined Offshore Survey Vessel with hybrid propulsion fitted for Geophysical and Geotechnical survey work. The vessel will have stern deployed equipment and will be restricted in manoeuvrability.


All vessels operating within this area are requested to keep a 500m distance and pass at minimum speed to reduce vessel wash. The vessel will always be listening to channel 16 but can set any other channel as required.

 

Throughout operations, the vessel will be displaying the appropriate lights and shapes as required under the COLREGS Rule 27(b)  

 

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Dogger Bank South Geophysical Site Investigation



Fugro will be undertaking geophysical and environmental site investigation on behalf of RWE Renewables within the proposed Dogger Bank South (DBS) Offshore Wind Farms array site and export cable routes.


The Fugro Frontier has commenced geophysical survey operations within the Dogger Bank South array sites which are expected to be continue until approximately the 31st October 2022. The Fugro Searcher is expected to join the Fugro Frontier within the array sites surveying from the 7th July until the 15th August 2022.

 

As the Fugro Frontier and Fugro Searcher will be towing survey equipment, vessels will require large turning circles and will be restricted in their ability to manoeuvre. All vessels operating within the array area are requested to keep their distance, maintaining at least the 1,000m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

 

Geophysical survey operations have commenced on the Export Cable Routes and being undertaken by the following vessels:

  • Fugro Discovery from the 11th June to the 20th July 2022 (15m water depth out to the array sites)
  • Valkyrie from the 14th June to the 20th July 2022 (Nearshore to 15m water depth)

The Fugro Discovery and Valkyrie operating on the export cable routes will be towing survey equipment and request that passing vessels maintain a 500m safety zone around the survey vessel.

 

Please note that the exact start and finish dates for all survey vessels will be dependent on the prevailing weather conditions and work progress.

 

Guard Vessel 'Rover Alpha' will maintain a presence along the export cable route during survey operations and can be contacted on VHF channel 16 for any project and / or fisheries related queries.

 

A continuous listening watch will be conducted on VHF Channel 16 by all survey vessels.

Survey operations will be conducted on a 24-hour basis.

 

Vessel Name Vessel Type Call Sign MMSI Number IMO
Fugro Frontier Array Survey Vessel C6BH4 311000263 9723667
Fugro Searcher Array Survey Vessel C6EI5 311000904 9504011
Fugro Discovery Offshore ECR Survey Vessel 3EKE6 372698000 9152882
Valkyrie Nearshore ECR Survey Vessel 2BWA9 235069806 n/a
Rover Alpha Guard / Scout Vessel MLAS2 235010380 n/a

 

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Geophysical Survey - Dogger Bank C Export Cable



The survey vessel, Northern Franklin, will conduct a geophysical Pre-lay survey along the Dogger Bank C export cable corridor in the Southern North Sea, between 9th March 2022 and approximately 1st July 2022. Survey operations will be continuous, 24 hours a day.


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.

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Cable Exposure - R100 Seg 2.03a



Please be advised that the R100 Seg 2.03a telecommunication cable has been wet stored and can be identified as a yellow surface buoy deployed at 59° 31.1880? N, 1° 32.3730? W and is unburied for approximately 5.5km along the proposed cable route.


This buoy is situated approximately 4km east of Fair Isle and consists of a yellow CRP600 buoy with radar reflector and 20m buoy tail c/w 10x polyform floats.  The removal of this buoy will be dependent on weather however it is likely to be removed within 1-2 weeks. Vessels should maintain a distance of at least ¼ NM from the deployed cable bouy. Please distribute this information accordingly so that other sea users are aware.  

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Geotechnical Survey - Hornsea Three



Mariners are advised that Orsted Hornsea Project Three (UK) Limited (hereafter ‘Orsted’) will be commencing a scope of Geotechnical survey works from the 2nd of July 2022. The survey is being undertaken for the purposes of geotechnical investigations of the Hornsea Project Three Offshore Wind Farm (Hornsea Three) project, located within the UK Sector of the North Sea, off the coast of East Yorkshire.


Please be advised that the operations are anticipated to mobilise from the 2nd  of July 2022 with investigations targeting the site.  The works will last for approximately 50 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.

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Summer Vessel Traffic Survey - Morgan & Mona



A marine vessel traffic survey is due to be undertaken for the proposed Morgan and Mona Offshore Wind Farm project. The survey will be undertaken from one survey vessel, MORNING STAR, and will involve the collection of data of detected vessels and marine users through use of onboard radar, AIS and visual survey methods.


The survey will collect data within the two proposed main offshore bidding areas for the Morgan and Mona projects within which the array for each project will be located. The extent of the areas in which the survey vessel may be located during the survey are shown in Figure 1 and Figure 2 of the attached NtM with accompanying coordinates. The survey vessel will roam and/or remain nominally static within the Morgan and Mona project areas for approximately 28 days (14 days in each area) depending on weather conditions. Dates may be subject to change. The survey vessel will operate on a 24hr basis and display appropriate day shapes (mast head signals visually indicating the status of a vessel to other vessels on navigable waters during daylight hours) and lights at all times during operations.

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Scottish Hydro Electric Power Distribution (SHEPD) Marine & Freshwater Subsea Inspections – 2022



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.


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 June 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.

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Visual surveys around Moray East Met Mast Gravity Base Structure



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake visual and geophysical surveys around the Met Mast remaining subsea structure location.


Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake visual and geophysical surveys around the Met Mast remaining subsea structure location. The survey vessel to be used is the Waterfall, detailed below. Activities are expected to commence on 27th June for approximately 5 - 7 days

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Survey within Moray East Windfarm site



Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake visual and geophysical surveys around the Met Mast remaining subsea structure location. The survey vessel to be used is the Waterfall. Activities are expected to commence on 27th June for approximately 5 - 7 day.


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Shallow Burial - East Anglia One Inter Array Cable



East Anglia ONE Offshore Windfarm request all vessels to strictly follow a 250m exclusion zone around EA1 Inter Array Cable between WTG B10 and WTG B09 when dropping anchor or using fishing equipment in the following areas due to shallow burial.


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Cable Installation - Notice to Mariners for Iceni and Mercator subsea cable systems



Cable Installation operations will be undertaken on the route of the Iceni system between Winterton, UK to Callantsoog, Netherlands. The works will be undertaken between 15 June and 14 August 2022. Cable Installation operations will be undertaken on the route of the Mercator system between Joss Bay, UK to Ostend, Belgium. The works will be undertaken between 20 June and 16 August 2022.


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Benthic Survey - Greater Gabbard Offshore Wind Farm



The ‘Wessex Explorer’ call sign: 2WWE will be carrying out a benthic survey with grab sampling, ROV and drop down camera in and around the Greater Gabbard offshore windfarm and cable routes. Works will include positions around the cable routes and entering the 50m exclusion zone on the Turbines IGE01 & GAA02. Operations are expected to commence 11 June 2022 for 8-10 days, excluding weather.


A 500-metre exclusion zone will be in force around the vessel at all times, if you need to approach the vessel please contact Wessex Explorer on Ch.16.

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Exposed Subsea Cable Position - Lowestoft Southern Approaches



Mariners and Port-Users are advised that the single orange marker buoy deployed at a section of subsea cable off Pakefield detailed in the previous NTM No. 24-2022, has now been removed. The subsea cable is still exposed along the route as shown in the below chart / table. Fishing, dredging, anchoring and all other sea bed activities are prohibited 500m North & South of this line/route. The guard vessels Shannon and CRC Loadstar are currently in the vicinity and are monitoring VHF ch 14 and 16


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Rock Placement Operations - Zeus Cable (A.K.A Circle North)



Cecon Contracting AS will conduct subsea operations on the "Zeus" fibre optic cable between Lowestoft and Zandvoort, for 2 days from 2nd June - 30th June 2022 using the rock placement Vessel Nordnes call sign: PHOG


Details:

  • The vessel will be conducting rock placement operations at 5 separate locations between Lowestoft, England and Zandvoort, Netherlands.
  • The operation is to place rock protection on parts of the Zeus cable, that was installed between Zandvoort and Lowestoft in May 2022.
  • The vessel will be severely restricted in its ability to manoeuvre, and other traffic is requested to stay well clear.
  • During the rock placement operation the vessel will be stationary on dynamic positioning.
  • The operation is weather dependent.
  • The operation will take in total 2 days. The earliest start date is 02nd June, and the latest completion date is 30th June 2022.

 Please note only one rock placement location in within UK waters (PL1026 PR Bacton to Zeebrugge 40" Gas)

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Geophysical and Environmental Survey - Salamander Offshore WindFarm



Salamander Offshore Wind Farm Geophysical and Environmental Survey window will commence 1st July and run until the 30th September 2022 (including potential for weather delays/downtime). Area includes 2km turning buffer for the survey vessel.


Salamander plan on undertaking geophysical survey and benthic drop-down video and grab survey activities. The survey window will commence on or around 1st July 2022 and, following a phased approach, is expected to take up to 42 days to complete to account for operational and weather delays. The anticipated survey window will run to 30th September 2022.

This survey will also aim to provide the necessary data to feed into the Environmental Impact Assessment (EIA) process. The Geophysical Survey will include Multibeam Echosounder (MBES), Acoustic MBES Backscatter (ABS), Side Scan Sonar (SSS), Magnetometer (MAG) and High Frequency Sub-Bottom Profiler (SBP) data at Windfarm Array Area (WAA) and Export Cable Route (ECR) locations. A coarse grid (1000 m x 1000 m line spacing) of Low Frequency SBP is also to be run at the WAA area and along the centreline of the ECR.

The geophysical scope of work will be divided in 3 main areas:

    • Offshore windfarm array area
    • Offshore section of export cable route
    • Nearshore section of export cable route

Water quality sampling will be required from the 8 m water depth contour up to the first 3 nm (from the shore) of the proposed ECR.

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Survey - Moray Offshore Windfarm (West)



Moray Offshore Windfarm (West) Limited (Moray West) will be carrying out geophysical site investigations from a survey vessel at the Moray West Offshore Wind Farm Export Cable Corridor close to shore. Whilst the Moray West wind farm site located on the Smith Bank in the Outer Moray Firth, approximately 22.5km from the Caithness coastline, the shore end of the export cable routes is close to the town of Portsoy. From 14th June until 12th July using the vessel Titan Discovery call sign: 2HCR3.


The works are anticipated to commence on, and no earlier than, 14th June 2022, and survey duration is expected to be approximately 3-4 weeks. Geophysical surveys are forecasted to be completed by 12 July 2022, but the exact survey duration and completion date will depend on weather and progress of the works.
 

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Geotechnical Survey - Morgan and Mona Offshore Wind Farm



The offshore geotechnical survey of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project array areas will commence on the 14 June 2022 and 19 June 2022.


The offshore geotechnical survey of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project array areas will commence on the 14 June 2022. The investigation involves the drilling, sampling and coring of 30 boreholes throughout the two proposed areas, utilising the vessel Fugro Synergy. The vessel will be stationary at each borehole location for up to 3 days to allow the samples and cores to be taken from the seabed.

 

In addition to the above, further offshore geotechnical survey of the proposed Morgan (North) and Mona (South) Offshore Wind Farm Project array areas will commence on the 19 June 2022. The investigation involves acquiring up to 120 Cone Penetration Tests (CPTs) (deep push) throughout the two proposed areas, utilising the vessel Normand Mermaid. The vessel will be stationary at each CPT location for up to 6 hours to allow the samples to be taken from the seabed.

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Dogger Bank A,B&C UXO Inspection Campaign



The Offshore Supply Vessel, KAMARA, will perform UXO Inspection operations within Dogger Bank A and Dogger Bank B Array construction areas and the DBC nearshore area.


The works will be performed in a single campaign, commencing on the 20th of June 2022 and continuing until approximately 31st August 2022. The works will be continuous, 24 hours a day. Charts of the DBA / DBB Array and DBC Nearshore areas including are provided below. The operations include the inspection of potential subsea Unexploded Ordnance (UXO) objects by means of a work class ROV (WROV).

 

During operations, the Kamara 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.

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2 x Metocean Buoy Deployments Blyth Met Mast – Floating Lidar Buoy Validation



Partrac are to deploy two Floating LiDAR FLS200 buoys (E03 and E13) at two locations , in close proximity to the ORE Catapult Blyth Met Mast. Once deployed, please maintain a 500m exclusion around each buoy. Deployment is expected to be carried out over one day from 22nd June 2022. The FLS200 buoys will be towed to the site by the vessel Tees Guardian. The two Floating LiDAR buoys will deployed under Marine Licence L/2020/00313/1.


METOCEAN BUOY

 

The metocean buoys record meteorological data and are anchored to the seabed by means of a mooring chain and a ground weight. The buoy has dimensions of 4m x 4m, and when deployed the tallest mast on the buoy sits approx. 4m above the water line.

 

The surface buoys will include: A day shape of yellow St Andrews Cross; radar reflector; and yellow navigation light.  The light will have a flash sequence 5Fl(20s).

 

VESSEL – TEES GUARDIAN

Call sign            2IJH2

IMO number      9759783

MMSI number    235110227

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Outfall Scour - Jarrow Staithes



The construction of an outfall scour below MHWS adjacent (just east of) Jarrow Staithes as part of a river water abstraction/discharge process to create energy for a district heating installation. The work will involve construction plant above MHWS, with workers on foot then assisting the positioning.


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Survey - Sheringham Shoal and Dudgeon Extension



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 using vessel Ocean Researcher starting around the 1st March 2022 and will continue for 120 days (estimated). UPDATE 08062022 - acquisition is continuing


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:-

Point

Latitude

Longitude

1

53°13'49”N

001°09'28"E

2

53°05'29"N

001°31'29"E

3

52°59'13"N

001°22'41"E

4

53°03'00"N

001°12'12"E

 

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

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Bridge Construction between Staithes and Riverbank



The construction of a bridge between the existing staithes at Jarrow and the riverbank as part of a river water abstraction process to create energy for a district heating installation. Abstraction Bridge Construction – programmed to commence Monday 13th June 2022 subject to obtaining of transport permits for the delivery of the bridge to site, and then to continue for a further period of 10 weeks.


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Mull – Coll Subsea Cable Installation



Mull – Coll: The project is experiencing significant delays for offshore cable install and no fishing gear clearance is required until further notice. The previous Notice to Mariners, dated 28th March 2022, is now cancelled. 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.


Mull – Coll: The project is experiencing significant delays for offshore cable install and no fishing gear clearance is required until further notice. The previous Notice to Mariners, dated 28th March 2022, is now cancelled. 

 

 

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.

 

 

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Geotechnical Survey - Berwick Bank Windfarm



SSE Renewables will be undertaking a geotechnical survey within the Berwick Bank Wind Farm and export cable route area. The survey is planned to mobilise between 15 -20 June 2022 for a duration of up to 2 months dependent on weather and downtime. Please note that SSE Renewables are not expecting fishermen to relocate gear - on this occasion the vessel(s) will work around any gear on location. A scouting/guard vessel will operate ahead of the survey vessel to ensure that this can be achieved.


The survey work is being undertaken by GEO and will be conducted from the vessel Northern Ocean. The scouting/guard vessel will be the Artemis.

 

The scope of work within the main array area will comprise approximately 100 seabed CPTs to a maximum depth of 30 m below the seafloor (bsf) and approximately 100 co-located vibrocores to a maximum depth of 6 m bsf. The scope of work along the export cable route will comprise approximately 80 seabed CPTs and 80 co-located vibrocores to a maximum depth of 6 m bsf.

 

During the survey campaign, the vessel(s) will be deploying underwater equipment to gather cores and also assess the geology in the area. As a consequence of equipment being deployed and the modes of operation, all mariners are advised to keep a safe clearance distance of no less than 500 m from the vessel(s).

 

For vessel and contact information, please see the attached Notice to Mariners document provided with this notice. 

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Cable Repair - Gwynt Y Mor Export Cable



Vessel change: The Forth Warrior has replaced the Forth Jouster. Please be advised of this notice advising mariners of the Gwynt Y Mor export cable repair. Work on site will be from 27/05/22 in the Gwynt Y Mor export cable corridor for approximately 55 days subject to weather. A barge, the NP459, will be assisted by two anchor handlers, Sea Bravo and Forth Warrior, to carry out a cable repair. Zwerver III and a crew transfer vessel, Mareel Scarlet, will support these operations.


Nature of Operations

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

 

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

 

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

 

The Mareel Scarlet CTV will support operations.

 

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 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.

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Shetland HVDC Cable Lay Works Campaign 1



Scottish Hydro Electric Transmission Plc, are due to commence the installation of Campaign 1 of the Shetland HVDC Link cable. Campaign 1 begins at Noss Head, North of Wick and runs to until approximately KP155, please see chart and coordinates provided below.


Planned Activities

 

The vessel, NKT Victoria, will be used to lay the cable on the seabed floor. Once the cable is laid on the seabed floor the vessel, Grand Canyon III, will be used to trench the cable to the required burial depth in the seabed. Any sections along the cable route that cannot be trenched, rock placement will be undertaken to achieve the required protection. The rock placement works will be completed in two campaigns. All works will be continuous, 24 hours a day.

 

Within the Noss Head Marine Protected Area the cable will be surface laid and protected by a cable protection system.

 

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. For this reason, the cable corridor will remain closed for any fishing that interacts with the seabed, anchoring or use of other equipment with seabed intervention.

 

Please be aware that vessels NKT Victoria, Grand Canyon III and Grane R will be restricted in their ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972). Masters of vessels are therefore requested to maintain their vessels at a minimum safe passing distance of 500 metres. NKT Victoria, Grand Canyon III and Grane R will display the appropriate shapes and lights in accordance with COLREGs Rules 16 and 18.

 

Co-ordinates of the cable corridor and charts of the working area are provided below. 

 

Guard Vessels

 

To protect the cable during installation activities Guard Vessels will be placed at approximately 15km intervals along the cable route. To provide the required coverage, approximately 7 guard vessels are expected to be utilised. The primary purpose of the Guard Vessels is to guard any unprotected cable along the cable route. The Guard Vessels will operate on a 24hr / 7 day per week basis. Any exchange of vessels shall be on site and coordinated so the unprotected cable is never unguarded.

 

It is requested that all vessels maintain a minimum of 500m safe distance from the installation vessels and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the cable corridor.

 

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Survey - Hornsea Three Offshore Wind Farm



Mariners are advised that Orsted Hornsea Project Three (UK) Limited (hereafter ‘Orsted’) will be commencing a scope of Geotechnical survey works from the 15th of June 2022. The survey is being undertaken for the purposes of geotechnical investigations of the Hornsea Project Three Offshore Wind Farm (Hornsea Three) project, located within the UK Sector of the North Sea, off the coast of East Yorkshire


Please be advised that the operations are anticipated to mobilise from the 15th of June 2022 with investigations targeting the site.  The works will last for approximately 91 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.

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Landfall Works at Boygrift - Viking Link Project



Mariners are advised about landfall works at Boygrift, Lincolnshire (English Landfall) being undertaken for the Viking Link project which is an HVDC electricity transmission interconnector between Denmark and England, a joint venture between National Grid and Energinet. The cable landfall works include cable burial work, diving operations and soil reinstatement with expected completion in UK waters by the end of August 2022.


The marine landfall works area is shown. Currently round Norwegian marker buoys are marking areas where spoil is temporarily left in place and poses a hazard to navigation.


The works will be managed by Prysmian PowerLink and operations will resume from August 2022. In the meantime, a dedicated guard vessel will be in position to guard the area at the landfall up to approx. 1km from the shore. 

 

Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain a safe distance, approximately 1000m from the areas identified. Dive works will be ongoing and during the works the vessel will have restricted manoeuvrability as it completes its work scope.


The Communication between the vessels will be through CH67 & 72.


VHF CH 16 will be monitored at all times and will be used to contact the coastguard in the event of an emergency
 

 

 

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Cable Lay Operations - Zeus (Circle North 2) Cable System



ENSHORE will be utilising the vessel Seadog call sign: MNSY6, which will be carrying out cable lay operations from shore to approximately 4.5km offshore along the corridor route. To support the cable lay operation at the UK nearshore section, the guard vessel (GV) Shannon call sign: YJQC6 will be on site from the 30th April 2022 for a period of approximately 8 weeks, until the cable is buried.


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Deployment of FliDAR Buoys - Celtic Sea



Two FliDAR systems are to be deployed to the Celtic sea to record metocean data.The FliDAR buoys will be deployed to position Zone 1A(English water) & Zone 5(Welsh water)Both buoys will be deployed from Falmouth harbour successively.The buoys will be in situ for 12 months(up to 36 months)The floating lidar buoy is approx.5m in length,3m wide &4.75m in height,with an anchor(dead man)weighing 2500kg.The system is comprised of the measurement buoy itself and a site-specific single catenary mooring.


The FLiDAR equipment will undergo regular scheduled maintenance during the operation period estimated to be 4 times a year, further notice to mariners will be issued confirming the dates and maintenance activities.

 

Following system checks onshore, the buoys will be either towed into position by a small works vessel or be deployed from a vessel through lifting of the buoys from the deck into the water. Key stages of the deployment are listed below:

  1. unit delivered by road and assembled ashore;
  2. unit, concrete sinker and mooring system loaded onto multipurpose vessel and taken to site;
  3. concrete sinker and mooring system deployed from the vessel; and
  4. unit deployed from the vessel and then attached to the mooring system.

Deployment Date:

  • Zone 1A: 1st June (up to the 20th June dependent on weather)
  • Zone 5: Following deployment of Zone 1A (within window June 1st – 20th)

Lighting System
Colour: Yellow
Location: Top side of the FLS
Height of light above water: 3 metres
Flashing Intervals ODAS FI(5) 20s (range 5 nautical miles)

 

24 Hour Emergency Contact Numbers:
AKROCEAN
Marine COLIN +33 (0) 7 89 08 05 19

Control room VALEMO +33 (0)5 47 30 20 60
EMERGENCY
112 / 999 ask for the Coast Guard
VHF Channel 16

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PrePARED Fish Tracking Array - Beatrice and Moray East Offshore Windfarms



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 MSS which aims to concurrently study predator (seabird and marine mammal) and prey (fish) distribution and behaviour in and around offshore wind farms. Deployed: 10 April 2022. Removed: 30 August 2026.


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

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Shallow Burial - Amitie Cable System



Alcatel Submarine Networks UK Ltd (ASN) was contracted to carry out construction activities for the AMITIÉ cable system. The AMITIÉ cable system spans nearly 6,600 km in total with the UK landing point in Widemouth Bay, near Bude, Cornwall. Shallow burial areas and short sections of surface laid/exposed cable in UK territorial waters. The areas of shallow burial and surface laid cable are due to hard ground or rock, where cable burial to the target depth was not possible.


The construction activities in the area shown were completed nearshore on 7th July 2021 using the vessel “Viking Energy”, and offshore on 24th August 2021 using the vessel “Ile de Brehat”. Post-lay inspection and burial (PLIB) works were completed on 29th November 2021 using the vessel “Ile d’Aix”.


This notice is issued to inform of as-laid shallow burial areas and short sections of surface laid/exposed cable in UK territorial waters. The areas of shallow burial and surface laid cable are due to hard ground or rock, where cable burial to the target depth was not possible. No further burial or protection works are planned for the AMITIÉ cable at this time.


It is requested that all vessels operating in this area keep their distance and avoid any works near the cable position. In view of the serious consequences resulting from damage to submarine cables, vessel operators should take special care when anchoring, fishing, mining, dredging, or engaging in underwater operations near areas where these cables may exist or have been reported to exist. In order to minimize the risk of such damage as much as possible, vessels should avoid any such activity at a minimum distance of 0.25 nautical mile, on either side of submarine cables.
 

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Exposed and Free Span - Greater Gabbard Offshore Wind Farm



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.


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.’

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Seabed instrumentation frame deployments - South Stack Irish Sea



A seabed instrumentation frame with associated ground line and clump weight is deployed and will be recovered in a suitable weather / tidal window. The ballasted frame weighs around 370kg, measures approximately 1.5m x 1.5m x 1.5m and is connected to a 100kg clump weight and remotely actuated pop-up buoy via a 100m wire ground line. Note: two frames were deployed initially, but one of these has been recovered already.


Inside the Morlais demonstration zone the frame sits on the seabed in more than 30m of water, 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 position listed here is as deployed.

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Seabed instrumentation frame deployment - Yell Sound



A seabed instrumentation frame has been temporarily deployed in Yell Sound and will be recovered in a suitable weather / tidal window. The ballasted instrumentation frame weighs around 370kg, measures approximately 1.5m high x 1.5m wide x 1.5m long  and is connected to a 100kg clump weight via a 100m wire ground line.


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.

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Rampion Wind Farm Component Exchange: June 2022



RWE Renewables UK Wind Ltd at Rampion windfarm would like to inform mariners that we are carrying out essential maintenance on the wind turbines. This work is due to commence on 10th June 2022 within the Rampion OWF Area, depending on weather.


RWE Renewables UK Wind Ltd at Rampion windfarm would like to inform mariners that we are carrying out essential maintenance on the wind turbines.

 

This work is due to commence on 10th June 2022 within the Rampion OWF Area, depending on weather.

 

The works involve; Using a jack up vessel to exchange large components in the nacelle of the turbine at L04, F06 & G11 location using the vessel crane.

 

The current outline planning is as follows:

 

Start Date: 10th June 2022

 

Vessel Name: Ziton Wind Server

The vessel will require a 200m exclusion Zone from their location at L04, F06, G11.

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Geophysical Survey - Triton Knoll



A-2-Sea Solutions will be carrying out a geophysical and environmental survey of the Triton Knoll infrastructure including WTG's, array cables and export cables.


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.

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Exposed power cable in free-span (up to 2 metres off the seabed)



A recent survey has detected a 17m long cable suspension (free-span), that is up to 2 metres high, on the BritNed Interconnector HVDC cable. This poses the risk of entrapment of trawling gear; all vessels fishing are advised to keep well clear. At its maximum height, the suspension is in the order of 1.5 - 2m clear of the seabed. BritNed are actively looking at remedial options, but in the meantime all fishing vessels are advised to give this location a wide berth.


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Diver Works Noss Head - Shetland HVDC HDD



Scottish Hydro Electric Transmission Plc, as part of the Shetland HVDC Link Project will be undertaking diving operations at Noss Head. The works will commence on the 8th of June and are located approximately 400m offshore in around 19m of water.


 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.

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Dogger Bank A Boundary Buoy Installation - as installed locations



The Trinity House Buoy Installation Vessel, Galatea, has installed the Dogger Bank A boundary Demarcation Buoys in the Southern North Sea.


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.

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Scour Protection Installation - Dogger Bank A



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


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.

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R100 Telecom Cable Installation



Global Marine will be conducting the installation of the R100 telecommunications cables on behalf of British Telecommunications plc between May and September 2022. Timings are dependent upon weather and other operational conditions. Works will utilise the C S Sovereign and Normand Clipper vessels.


 

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.

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Geophysical and environmental survey - Morgan and Mona Offshore Wind Farm Project



A geophysical and environmental (benthic) survey of the proposed Morgan and Mona Offshore Wind Farm Project will commence on the 02.04.22 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.


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.

 

Vessel Name:

Ocean Observer

Vessel Type / LOA(m):

Multi-Role Survey Vessel / 80.4 m

Vessel Function:

Survey vessel

VHF Call Sign:

GHXX

MMSI:

232217000

Vessel Operator Telephone:

+44 2039 917 728

+44 7584 686 311

 

  1. Project Contact Details

Offshore Fisheries Liaison Officer:

 

Chris Emerson (NFFO)

 

Email: nffo-flo@hotmail.com

 

Telephone: +44 750 748 4314

Fishing Industry Representative:

 

Tom Watson (NFFO)

 

Email: tomwatsonfleetwood@btinternet.com

 

Telephone: +44 790 317 3624

Company Fisheries Liaison Officers:

 

Beth Owens (MarineSpace)

 

Email:

yellow1-2cflo@marinespace.co.uk

 

Telephone: +44 783 355 7808

 

Jonny Lewis (MarineSpace)

 

Email:

yellow1-2cflo@marinespace.co.uk

 

Telephone: +44 781 764 4284

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Redeployment (Floating LiDAR Redeployment) - Valorous



The redeployment of the Floating LiDAR system within the proposed Valorous Floating Offshore Wind Farm project site, following recovery in January 2022, has been successfully undertaken.


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

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Loss of Clump Weight - MarramWind



On the 6 May 2022 at 17:12 UTC, during sea acceptance trials for the MarramWind Site Investigation Surveys, a Sound Velocity Probe (SVP), Ultra Short Baseline (USBL) acoustic positioning system beacon and clump weight were lost. The lost equipment measures 100cm x 30 cm x 30cm. The depth of water where incident occurred is 125m. The Project is working to recover the object. Marine operators are advised to be aware of this object during any operations they undertake.


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Mooring and scientific equipment installed - Moray West offshore windfarm site



Mariners are advised that the University of Aberdeen has completed the installation of the moorings and equipment listed in the current notice. Moorings support sound recording equipment, and / or acoustic loggers that record echolocation clicks of dolphins and porpoises. Subsurface moorings 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.


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Dogger Bank A Export Cable Burial Operations



The trenching support vessel, Grand Canyon III, will perform post-lay burial operations, including post-trench survey, on the Dogger Bank A export cable in the Southern North Sea. The work will be performed in a single Campaign, starting on the 3rd May 2022 and continuing until approximately 29th July 2022. The work will be continuous, 24 hours a day.


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.

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IRIS Fiber-Optic Submarine Telecommunications Cable Installation



Please be advised that the cable laying ship CS DURABLE will be conducting telecommunication cable installation operations for the IRIS undersea cable system between Galway Bay, via Rockall, to Iceland, work is scheduled to be carried out between approximately 30th May and completing approximately 15th August 2022.


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

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Subsea Cable Installation - Mainland Orkney to Hoy North and Centre



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.


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.

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Power Cable Installation - Carradale to Arran



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.


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.

 

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Subsea Foundation Inspection - Moray Offshore Windfarm (East)



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence subsea Remotely Operated Vehicle (ROV) foundation inspections at all locations within the bounds of Moray East Offshore Windfarm on the 1st April 2022 for 100 days. This includes scour visual inspections at all jackets, and Cable Protection Systems entering substructures at selected locations. The area of Operation is shown in Figure 1 below and will be carried out using the GXS Viking.


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Export Cable Corridor Survey - Outer Dowsing Offshore Wind Farm



Outer Dowsing Offshore Wind (a joint venture between TotalEnergies and Green Investment Group) shall be conducting a 3.5 month offshore geophysical survey between the 26th March and 15th July 2022 using vessel Geo Ocean III call sign: LXGP. The survey vessel shall be towing a cable up to approximately 75m behind the vessel (the end marked by a tail buoy) at depths of up to 3m below sea level. The survey vessel shall have limited maneuverability so please allow a safe distance.


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

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Cable Route Survey - Oceaniq Q&E North and South



Mariners are advised that survey vessels and equipment will be used in the offshore areas and coastal sea waters between UK, France and Belgium. Further nearshore and landfall survey work will be concentrated around Ramsgate,UK, to Oostende,Belgium on the Northern Q&E route and Newhaven,UK to Cayaux-surMer, France on the Southern Q&E route. The nearshore geophysical surveys work will be conducted by DeepBV using survey vessels Deep Seapal and Deep Marker the 24th January 2022 to 31st July 2022.


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.
 

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Guard Buoy Deployment - Berwick Bank OWF



Mariners are advised that a guard buoy associated with a bottom mounted ADCP device recording metocean data within the proposed Berwick Bank Wind Farm array area will be deployed.


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. 

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Inter Array Cable Installation - Seagreen Site Boundary



On behalf of Seagreen Wind Energy Ltd, Seaway 7 will install and trench inter-array cabling between the wind turbine generator foundation structures and offshore sub-station platform within the Seagreen site boundary. Operations will commence with cable lay and trenching between wind turbine generator foundation structures, inter array cables will also be installed into the Offshore Substation Platform at a date to be confirmed. Two vessels will be involved in the operation.


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.

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Geophysical survey - Morven offshore wind farm



A geophysical survey of the proposed Morven Offshore Wind Farm Project will commence on the 11th April 2022 for approximately 3 months. The survey involves the use of 2DUHR equipment, Multibeam Echosounder, Sidescan Sonar and Magnetometer equipment, some of which will be towed approximately 150 m astern of the vessel. There will also be drop-down camera, grab samples, Cone Penetration Tests and boreholes undertaken.


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.

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Lost Grapnel equipment - Shetland HVDC



MV SIMA has been undertaking PLGR works as part of the Shetland HVDC subsea cable link project.  During operations part of the Grapnel hook used to recover debris from the seabed along the cable route was lost. The piece of equipment is diamond shaped and  measures 0.5 x 0.5 m and is approx 50mm thick. Marine operators are advised to be aware of this object during any operations they undertake.


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Site Investigation Surveys - MarramWind Offshore Wind Farm



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).


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).

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Survey - West of Orkney Wind Farm



This geophysical survey shall take place from 2 April 2022 to 31 August 2022 and will occur in three phases: 1) Course survey lines over the offshore option agreement area and single survey lines along potential cable routes to Caithness; 2) Detailed survey in the offshore option agreement area. This phase is divided into three sub-sections and; 3) Detailed survey of potential cable corridors to Caithness. The Relume will carry out the work and the port of operation is Scrabster.


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Completion of works - Moray East Offshore Transmission & Offshore Substation Platforms



The works associated with the Offshore Transmission (OfTI) and Offshore Substation Platforms (OSPs) were completed on the 13th January 2022. Overall care, custody and control of the works has been handed over to the Moray East Operations and Maintenance Team.  Please note, construction works associated with the Windfarm Infrastructure remain ongoing.  


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WTG Installation and Commissioning - Moray East Windfarm



Moray Offshore Windfarm (East). Now that installation is complete. The commissioning of the 100 WTGs has now been completed and no construction activity is planned for the period 24th January 2022 to 31st January 2022. Some construction works remain outstanding and will take place prior to the final commissioning of the development.


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Deployment of a SeaWatch LiDAR Buoy (SWLB) - Awel Y Mor Offshore Wind Farm



Awel Y Mor Offshore Wind Farm Limited are planning the Deployment of 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 off the North Wales coast at Liverpool Bay. The equipment will be deployed within the Awel Y Mor Offshore wind farm array limits and will be deployed for approximately twelve months from March 2022.


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.  

 

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Dropped object - Eastern Irish Sea



The seabed frame of the Mona metocean buoy has been lost in the Eastern Irish Sea. The last known location was: 53°40.268' N, 003°53.773' W. However, it seems likely that is has been dragged off location, potentially approx. 200m in a NW direction. The Mona buoy and accompanying chain have been recovered, but the seabed frame and approximately 30m of the combi rope groundline attached to the sea frame is lost. The Project is working to recover the object.


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Anchor Block Removal - Wave Hub Site - Hayle, Cornwall



Mariners are advised that between 4th March and 15th August 2022, subject to suitable weather windows, operations will take place to remove redundant concrete and steel anchor blocks.


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.

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Construction of Wind Farm - Neart na Gaoithe Offshore Wind Farm Limited



Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) will commence construction work for Neart na Gaoithe (NnG) Offshore Wind Farm, from the 9th August 2020, with the start of casing and pile installation operations on the wind farm site.


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:

 

Name Location

SP 1 - Special Mark - Fl Y 5s light character

56°18.180'N 02°12.075'W

SP 2 - Special Mark - Fl Y 5s light character

56°15.643'N 02°09.329'W

SP 3 - Special Mark - Fl Y 5s light character

56°12.294'N 02°15.796'W

SP 4 - Special Mark - Fl Y 5s light character

56°14.038'N 02°18.975'W

SP 5 - Special Mark - Fl Y 5s light character

56°18.924'N 02°18.951'W

 

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

 

Name Location

NNG - North Cardinal - Quick (Q) white light character

56°20.425'N 02°14.617'W

NNG - East Cardinal - Q (3) 10 s white light character

56°14.329'N 02°08.558'W

NNG - South Cardinal - Q (6) + Long (L) FL 15 s white light character

56°12.294'N 02°09.760'W

NNG - West Cardinal - Q (9) 15 s white light character

56°17.057'N 02°21.084'W

 

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.

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Hywind Tampen installation



Activity: Installation of 11 floating wind turbines with anchor system on Hywind Tampen, in the area between Snorre, Visund and Gullfaks. Two export cables will also be installed from Hywind Tampen to Snorre and Gullfaks.


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.

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Offshore Sub-station Hook Up & Commissioning Activity - Seagreen Offshore Windfarm



A period of hook-up and commissioning activity will commence at the Seagreen Offshore Wind Farm Sub-Station platform.


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.  

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Seagreen Offshore Wind Farm – Maintenance of Acoustic Monitoring Devices



Maintenance works will be undertaken on the five acoustic monitoring devices located in and around the Seagreen Offshore Wind Farm site.


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.

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Seagreen Offshore Wind Farm –Installation & Commissioning of Wind Turbine Generators



Installation of wind turbine generators (WTG) will commence within the boundaries of the Seagreen offshore wind farm.


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.

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Deployment of Two Metocean Buoys, with Co-Located Guard Buoys - Dogger Bank



Partrac are to deploy two metocean buoys at two locations within the Dogger Bank South Project Area in January 2021, for a period of 6 months. The metocean buoys will be deployed alongside two guard buoys which will be co-located ~200 m NNW from the Metocean Buoys. Please maintain a 500 m clearance from the deployed equipment.


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. 

 

 

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Shetland HVDC Link - Presence of HDD Exit Ducts at Noss Head



This notice is issued to make mariners aware of the completion of the HDD operations and the presence of three ducts protruding from the seabed at Noss Head.


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.

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Deployment of Floating LiDAR Buoy - Berwick Bank Wind Farm



Mariners are advised that SSE Renewables will be deploying a floating LiDAR Buoy within the proposed Berwick Bank Wind Farm array area.


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.

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Seagreen Offshore Windfarm - Foundation Grout Installation



Grout will be installed in the Wind Turbine Generator foundation suction caisson voids within the Seagreen site boundary


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.

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Carradale - Arran North and South Subsea Cables Charting Errors



The charted locations of the Carradale to Arran subsea electricity cables in the Kilbrannan Sound may be inaccurate and are being reviewed. Any corrections required will be issued as soon as possible. Mariners should be aware that the true cable locations may be up to ~300m from the presently charted positions. The location of this hazard notice is not indicative of any true cable location and is for information only.


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Seagreen Offshore Wind Farm - Scour Protection Installation



Subsea Scour Protection rock installation will commence on the Seagreen Offshore Windfarm foundation structures within the site boundary.


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.

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Seagreen Offshore Windfarm - Deployment of a Guard Vessel



Due to construction activity commencing within the Seagreen development site a guard vessel will be deployed.


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.

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Construction work - Seagreen Offshore Windfarm



On behalf of Seagreen Wind Energy, Seaway 7 will commence installation of 114 three legged suction caisson foundation structures. The foundations will be towed from Nigg,Cromarty Firth.On arrival at site the foundations will be installed by the Heavy Lift vessel Saipem 7000.The tug Nicobar will assist the Heavy Lift vessel with barge mooring operations.Foundation grouting operations will take place from the vessel EDT Hercules. Installation is expected to commence on or around 1st October 2021.


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Wave Buoy Deployment - London Array Offshore Wind Farm



A Wave Rider Buoy will be deployed onsite from 24th September until further notice as part of ongoing monitoring of offshore conditions to support operations. Spectrum Offshore will be engaged to deploy the buoy. Description of wave rider buoy: Yellow spherical buoy, transparent top dome with solar panels and flashing light. Weight: 197kg Size: 1.10m Diameter. The buoy is connected to a subsea weight on a surface line. Vessels are requested to always maintain a 250m clearance around the buoy.


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