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Morgan and Mona Offshore Windfarms - Metocean operational status, system maintenance and recovery



Permanent recovery of metocean instrumentation from the Mona (South) location is planned for the upcoming weather window on 28 January 2023.


The floating LiDAR instrumentation at Morgan and Mona sites are scheduled to remain in place until 2024.

 

All metocean instrumentation including the seabed frame, ballast weight, marker buoy and associated mooring will be removed from the site (refer to mooring diagram provided in Section 7). Operations are expected to require one day on site to complete.

 

The floating LiDAR systems deployed at the Mona (South) and Morgan (North) locations will continue their deployment (refer also to mooring diagram provided in Section 7). The metocean instrumentation at the Morgan location will also remain deployed until a suitable weather window is identified for recovery of this system.

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Geophysical Survey at G13 & H05 Moray Offshore Windfarm (East) Limited



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake geophysical surveys around Wind Turbine Generator (WTG) ME-G13 and H05. The geophysical survey is covering an area of 270m x 270m centred on the WTG. The survey vessel to be used is the Waterfall, detailed below. Activities are expected to take place between 02/02/2023 and 28/02/2023.


Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to undertake  geophysical surveys around Wind Turbine Generator (WTG) ME-G13 and H05. The geophysical survey is covering an area of 270m x 270m centred on the WTG.  The survey vessel to be used is the Waterfall, detailed below. Activities are expected to take place between  02/02/2023 and 28/02/2023.

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



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 January 2023, with start dates and anticipated durations listed against each individual location in the attached NtM. Start dates are subject to change due to weather.

 

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 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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Nearshore Marker Buoy Installation – Moray Offshore Windfarm (West) Limited Offshore Export Cable



This notice to mariners is to inform that Moray Offshore Windfarm (West) Limited (Moray West) will install a nearshore HDD marker buoy on or around 2nd February 2023. Details of the buoy and its location are provided below. A further NtM will be issued when the buoy is removed.


Once the nearshore marker buoy is installed during the initial HDD diving works by Isle of Jura, it will stay in position until the Offshore Export Cables (OEC) installation works at nearshore area are fully completed. Forecasted to be completed around 31 December 2023, but the exact duration and the nearshore marker buoys recovery date will depend on overall project progress.

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Nearshore Weather Buoy Installation– Offshore Export Cable



This notice to mariners is to inform that Moray Offshore Windfarm (West) Limited (Moray West) will install a nearshore weather buoy on or around 2nd February 2023. Details of the buoy and its location are provided in the description. A further NTM will be issued when the buoy is removed.


Once the nearshore weather buoy is installed during the initial HDD diving works by Isle of Jura, it will stay in position until the Offshore Export Cables (OEC) installation works at nearshore area are fully completed. Forecasted to be completed around 31 December 2023, but the exact duration and the nearshore weather buoy recovery date will depend on overall project progress.

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Major component repairs at Moray East Wind Farm – Safety Zones



Moray East Offshore Windfarm are planning major component repair activities on several Wind Turbine Generators (WTGs). The list of potential WTGs where works may take place are listed below. These activities will be undertaken using the Jack-up vessel Wind Orca, expected during the period between 1st February and 2023 and 3rd March 2023.


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UXO geophysical surveys within the EA HUB Offshore Wind Farm area



Scottish Power Renewables UXO geophysical surveys within the EA HUB OWF area. Scottish Power Renewables (SPR) has contracted Fugro GM Marine Limited (Fugro) to carry out UXO surveys located on their site east of Lowestoft, United Kingdom, in the southern North Sea and covers an area of approximately 5,900 km2 for the East Anglia HUB offshore windfarm.


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Dogger Bank A Asset Preservation Campaign



The Offshore Supply Vessel, VOS Start, will carry out Asset Preservation operations within Dogger Bank A construction site. The works will be performed in a single campaign, commencing on the 6th of November 2022 and continuing until approximately 30th September 2023. The works will be continuous, 24 hours a day. The operations will include visual inspections and maintenance at installed wind turbine foundation locations.


During operations, the VOS Start 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 500m 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 area.

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Dogger Bank A Export Cable Reduction to Charted Depth



During the campaign to lay and bury the Dogger Bank A export cable, it has been necessary to install rock berm protection over the cable in locations where it has not been possible to trench bury the cable


In the section of cable shown in Figure 1 of the attached NtM, the rock berm installation has been installed to a maximum height of approximately 0.6m above seabed level. In these locations, this represents a reduction in depth at Lowest Astronomical Tide (LAT) of approximately 5%.

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Dogger Bank B: Export Cable Trenching Trial Operations



The cable laying vessel, NKT Victoria, will perform trenching trial operations within the DBB Export Cable Corridor. NKT Victoria will be testing a newly built jet plough within the locations provided. At each trial location, the proposed sequence of activities includes: Pre-Lay Survey of selected site; Demonstration burial of the cable with NKT Jet Plough (Max length of 1 km); As-Buried Survey; and Recover cable back to NKT Victoria.


The trenching trials will commence on the 01 February 2023 for approx. 2 weeks. The work will be continuous, 24 hours a day.

 

NKT Victoria will be testing a newly built jet plough within the locations provided. At each trial location, the proposed sequence of activities includes:

  • Pre-Lay Survey of selected site;
  • Demonstration burial of the cable with NKT Jet Plough (Max length of 1 km);
  • As-Buried Survey; and
  • Recover cable back to NKT Victoria.

 

All equipment used for the trials will be removed upon completion of the test.

 

During operations the NKT Victoria will be restricted in its ability to manoeuvre as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972) and will display the appropriate day shapes and lights. The vessel will also transmit an Automatic Identification System (AIS) message.

 

It is requested that all vessels maintain a minimum of 1.5Nm separation distance from NKT Victoria and pass at reduced speed. Fishing gear or other equipment with seabed intervention should not be deployed when approaching the working area.

 

An Offshore Fisheries Liaison Officer will be onboard NKT Victoria to provide support and coordination to fishing vessels

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ECR Landfall Scouting Survey



Data acquisition nearshore along the coastline between Banff/Macduff to Fraserburgh, Scotland. Assisting with the selection of a suitable landfall site for an Export Cable Route as part of an upcoming wind farm development.


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White Cross Offshore Windfarm - Floating Lidar Service Visit -Update



Please be advised that from the 05th of December 2022, the Floating LiDAR deployed in Celtic sea to record wind and metocean data for the White Cross offshore wind farm will undergo a service visit at the offshore deployment location.


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. An image and schematic of the floating lidar buoy is provided below.

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Metocean Buoy Deployment - Caledonia Offshore Wind Farm



Caledonia Offshore Wind Farm will be deploying a metocean buoy to collect meteorological and oceanographic climate data from the Caledonia OWF site.


The OSIL Fulmar Data Buoy is anticipated to be deployed by Briggs Marine Contractors Ltd no earlier than the 9th of January 2023 (weather dependent). The buoy will remain in situ until May 2023.

 

Buoy specifications and more details of the works can be found within the attached NtM.

 

*NtM V4 attached 20/01/23 - extension to deployment period & change of vessel

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



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.


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Shetland HVDC Project - Pre-Lay Grapnel Run



NKT, on behalf of Scottish Hydro Electric Transmission Plc, are due to commence a pre-lay grapnel run (PLGR) along the Shetland HDVC link cable route from KP160 to KP0 Weisdale Voe, Shetland. The operation will be performed by JD-Contractors with the vessel Sima.


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.

 

The PLGR will be completed using a grapnel towed from the vessel Sima. The grapnel will be deployed to retrieve any potential debris that could pose a hazard to cable installation.Penetration for the grapnel rigs,  shall range from 0.5 to 1.8m into the seabed.

 

The attached NtM details the proposed works, co-ordinates and a chart describe the working area.

 

Please be aware that vessel, Sima, will be restricted in her 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.

 

Sima will display the appropriate shapes and lights in accordance with COLREGs Rules 16 and 18

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Dogger Bank B Boundary Installation Campaign



The Trinity House Buoy Installation Vessels Patricia and Galatea, will be installing the Dogger Bank B boundary demarcation buoys in the Southern North Sea in two tranches - THV Patricia Tranche 1 29th December 2022 to 01st January 2023 and THV Galatea Tranche 2 02nd February 2023 to 06th February 2023


The 20 construction boundary demarcation buoys will remain in location until the windfarm construction activities have been completed and handed over to the Operations and Maintenance teams.

 

Once the permanent Aids to Navigation (AtoN) have been installed on the WTGs, Trinity House will approve the permanent AtoN and the boundary buoys will be removed.

 

If anyone finds a buoy that is off station or encounters a buoy location where it is not functioning or is missing, they should report this to the Dogger Bank Duty Marine Coordinator as soon as possible.

 

The first tranche of buoys have been deployed, these are East Cardinal E1 and Special Mark(s) SP6 to SP9 inclusive.

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Survey - Norfolk Offshore Wind Farm



Please be advised that Fugro will be undertaking a geophysical and geotechnical site survey on behalf of Vattenfall Wind Power over the Norfolk future wind farms in the North Sea.


MV Fugro Quest (geotechnical vessel) is performing site investigation activities on the Norfolk Boreas site from the second half of December 2022 until February 2023. Vessel shall work on geotechnical investigation locations where they will remain stationary for period of 4-24 hours.

 

MV Atlantis Dweller (ROV support vessel) will be performing survey activities on the Norfolk Boreas, Norfolk Vanguard and Cable Crossing sites from approximately 17 January 2023 for approx. 2 weeks. The vessel shall deploy an ROV for surveys alongside seabed infrastructure.

 

 

Contact Details – Fisheries Liaison

Jonathan Keer; jonathan@brownmay.com; 07850 604851

Freya Sandison; freya@brownmay.com; 07857 500609

 

Contact Details – Vattenfall

Rory Anderson; rory.anderson@vattenfall.com

Richard Brewer; richard.brewer@vattenfall.com

Matina-Christina Sougle - matina-christina.sougle@vattenfall.com

Emma Merryfield - emma.merryfield@vattenfall.com

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Survey Equipment Trials - Liverpool Bay



Gardline propose to conduct equipment trials during Feb 2023 within UKCS Quads 110 and 113 (Option1) or UKCS Quads 109 and 110 (Option2). We intend to perform trials to test a new 6 streamer deployment system from MV Ocean Geograph. The trials package will consist of dual sparker sources, 6 streamers, MBES, USBL, Side scan sonar and dual frequency SBES. Trials programme will be SV dip, 6 streamer and dual sparker deployment and function tests.


Equipment trials are expected to take 7 days within a two month window, subject to weather conditions on site. The trials will have towed equipment comprising 6 x Short Streamers, varying from 24-48m in length, 2 x Sparker sources and Side Scan Sonar.

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Unmanned Surface Vessel (USV) Survey - Hartlepool



Activity: Operations of remotely piloted Uncrewed Surface Vessels (USVs) are planned out of Hartlepool during January & February 2023. The vessels will be engaged in survey activities.


Dates: Operations will take place subject to weather and other operational factors from 9th January 2023 for up to 4 weeks.

A support vessel will escort the USV from the active ports to clear water. 

 

Although the vessel is uncrewed, it is crewed throughout the 24 hour operation, piloted remotely using 360 degree cameras and other navigational aids.

The survey area boundary is indicated in Table 1 below also. In addition to the survey area, the USVs will transit from one of the named ports above to site.

 

Table 1: Area Boundary

Point

Latitude

Longitude 

1

54.796272

-1.31112

2

54.871667

-1.353383

3

54.82037

-1.09621

4

54.914414

-1.189275

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Floating LiDAR and Metocean Survey - Muir Mhòr Offshore Wind Farm



Metocean instrumentation and a floating LiDAR system (FLS) are planned for deployment within the boundary of the proposed Muir Mhòr Offshore Wind Farm Project site in the North Sea. All instrumentation is planned for deployment by Green Rebel from the Port of Aberdeen to the Muir Mhòr Project site in January 2023. Deployment vessel information will be included in a subsequent update to this notice. MARINE USERS are requested to maintain a safe clearance distance of 500m.


All instrumentation will be deployed at a single deployment location within the project site. The purpose of the instrumentation is to gather Metocean and wind data to inform the proposed Muir Mhor Offshore Wind Farm Project.

 

The FLS mooring comprises of a surface visible buoy moored to the seabed through a combination of rope and chain via two mooring points.  Two guard buoys will be located at a distance of 40m from the main FLS buoy in a North/South orientation, with the mooring spread covering a 315m radius. There is also a seabed frame for current measurements contained within the overall deployment footprint.

 

The FLS light characteristics are Fl (5) Y 20s with 5nm range. The guard buoys’ light characteristics are FI Y 5s with 3nm range and include a yellow St. Andrew’s Cross topmark. The FLS will be designated as “Miur Mhor Floating Lidar” on AIS, with MMSI number 992351400.

 

Details of the surface visible buoy, guard buoys, seabed frame and mooring arrangement are provided in the attachments.

 

MARINE USERS are requested to maintain a safe clearance distance of 500m.

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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.


Mariners are advised that the vessel outlined below is expected to commence operations at Triton Knoll Offshore Wind Farm for work within the Triton Knoll Offshore Wind Farm site.

 

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

NOS Maker Crew Transfer Vessel 0ZJD2 219026749 9802346 Grimsby 07/01/2023

 

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:

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

 

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

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.

*** 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.

 

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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Moray West - Construction / Nearshore Horizontal Directional Drilling (HDD) / Diving Works



Moray Offshore Windfarm (West) Limited (Moray West) will be commencing construction works of the Moray West Offshore Wind Farm Offshore Transmission Infrastructure (OfTI Marine Licence MS-00009813) no earlier than 22 January 2023, with the first construction works being carrying out nearshore horizontal directional drilling (HDD) diving works from a vessel at the Moray West Offshore Wind Farm Export Cable Corridor.


Moray Offshore Windfarm (West) Limited (Moray West) will be commencing construction works of the Moray West Offshore Wind Farm Offshore Transmission Infrastructure (OfTI Marine Licence MS-00009813) no earlier than 22 January 2023, with the first construction works being carrying out nearshore horizontal directional drilling (HDD) diving works from a vessel at the Moray West Offshore Wind Farm Export Cable Corridor.

 

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.

 

The HDD diving vessel works are to take place within the blue boundary shown in the figure in the attached NtM.

 

The works are anticipated to commence no earlier than, 22 January 2023, and HDD diving works duration is forecasted to be completed around late April 2023, but the exact HDD diving works duration and completion date will depend on weather and progress of the works.

 

Nearshore HDD works

Scope of work to include deployment of the diving vessel four-point mooring system to support two HDD duct ends preparatory works at nearshore, utilising the diving vessel Isle of Jura (supported by Dalby Don as the crew transfer vessel) and will remain in place until all nearshore HDD diving works are complete.

 

On completion of the HDD diving works, the weather buoy will be deployed by Isle of Jura in DP mode.

 

General Safety Advice

Please be aware that, during the HDD work activities, by virtue of its mode of operation the Dive support vessel Isle of Jura will be Restricted in her Ability to Manoeuvre (RAM) and will also display the flag ALPHA and appropriate day shapes while diving operations are taking place as defined under COLREGs (International Regulations for Preventing Collisions at Sea 1972, Rule 3). Masters of vessels are therefore requested to maintain their vessels and gears at a minimum safe passing distance from the vessel of 500 metres when it is undertaking work and showing the appropriate shapes and lights in accordance with COLREGs Rule 27 In order to not compromise the safety of the Isle of Jura and their crew, and the ability to undertake its contracted works.

 

Vessel Information

Nearshore HDD diving operations will be carried out by the diving vessel Isle of Jura.

Isle of Jura will carry out the two HDD duct ends preparatory works at nearshore utilising onboard diving spread moored at HDD duct ends punchout locations by deploying the vessel four-point mooring system.

 

The diving vessel Isle of Jura will be supported by Dalby Don as the crew transfer vessel.

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Notice to Mariners - Mainland Orkney-Hoy North and Centre Installation



Please be advised that Briggs Marine Contractors (on behalf of SHEPD) shall be undertaking the following subsea cable installations: • Mainland Orkney to Hoy North • Mainland Orkney to Hoy Centre


Please be advised that Briggs Marine Contractors (on behalf of SHEPD) shall be undertaking the following subsea cable installations: • Mainland Orkney to Hoy North • Mainland Orkney to Hoy Centre

 

Both cables are to be installed in close proximity to each other within the corridor shown in Fthe attached NtM.

 

Vessel Operations

The work utilises cable ship Elektron for the cable installations.

DSV Forth Warrior will be conducting diving operations within the cable corridor.

Elektron will be assisted at the shore ends by Celtic Guardian, Celtic Mara, Celtic Nomad and Celtic Trader, regularly passing inside the working corridor for crew transfers and supporting nearshore cable landing operations.

Support vessel, Athenia will be carrying out pre-lay and post lay surveys of the cable route.

Operations are expected to commence on the 25th January for a period of approximately 4 weeks.

 

Work Description

During operations the vessels Elektron, Forth Warrior and Athenia will be restricted in ability to manoeuvre. Whilst operations will seek to minimise disruption on the width of the main navigation channel, some disruption may be unavoidable during operations within the working corridor.

Cable laying operations may be conducted on a 24-hour basis. ROV and Dive operations will be 12-hour basis.

Should any vessel wish to come within 500m of the vessels, then direct communication with the Master / Operator is required.

The vessels will display the appropriate lights / day shapes for their operations.

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Seabed Activity Bluemull Sound (Shetland) – Subsea Tidal Array



The purpose of the operation is to conduct work on a subsea tidal energy array in the Bluemull Sound, Shetland.


A multicat vessel the Leask Marine C-Odyssey, call sign 2ETW7, will conduct offshore and subsea operations. Works will include loading and preparatory work at Cullivoe Harbour and Belmont Pier. Operations could take place during the day or at night. Operations will be conducted within the works area bounded by points A/B/C/D below (vessels should keep well clear e.g. 100m) and up to 50m either side of the cable corridor route. Equipment may be temporarily stored just offshore of the new Cullivoe Marina breakwater in 5-7m water depth, marked with a yellow buoy and single Fl Y 5s (one yellow flash every 5 seconds) light. See coordinates below.

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SHETLAND HVDC Link - Weisdale Voe Landfall Works



NKT, on behalf of Scottish Hydro Electric Transmission Plc, will be undertaking trenching operations at Weisdale Voe to assist with the installation of the Shetland HVDC Link cable.


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.

 

NKT plans to install two polyethylene (PE) ducts in preparation to protect the Shetland HVDC Link cable. One duct will be used for the HVDC cable bundle and a second duct for cable redundancy. Trenching operations will be completed by an onshore excavator on tracks, the trench will start from KP0.00 to KP0.022.

 

Prior to trenching and backfilling operations, a silt screen will be installed. The silt screen will be approx. 100m long. By installing the silt screen the work area will be a confined area, reducing sediment dispersal to the wider area.

 

The trench will be 1.8m deep and 2m wide at the base, as the trench will have sloping sides it will be wider at the top. Once the PE ducts are installed the trench will be backfilled with rock. The seabed and beach will then be reinstated with the excavated material to return to the original profile as close as reasonably practicable.

 

The works will be carried out during day light hours based on a 12-hour working day (6 days a week).

 

The works are due to commence on the 09.01.2023 and have an estimated completion date of 20.02.2023

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Subsea Cable Installations Carradale – Arran Mull - Coll



Please be advised that Briggs Marine Contractors (on behalf of SHEPD) have undertaken subsea trenching operations along sections of the following cable routes: • Carradale to Arran • Mull to Coll The trenching operations are now complete and the remaining workscope involves installation of cable protection at the Arran, Mull & Coll shore landings. This NtM has been updated to remove exclusion zones from a majority of the cable routes. Please see Vessel Operations below.


Please be advised that Briggs Marine Contractors (on behalf of SHEPD) have undertaken subsea trenching operations along sections of the following cable routes: • Carradale to Arran • Mull to Coll The trenching operations are now complete and the remaining workscope involves installation of cable protection at the Arran, Mull & Coll shore landings. This NtM has been updated to remove exclusion zones from a majority of the cable routes. Please see Vessel Operations below.

 

Vessel Operations The trenching operations utilising the Grand Canyon 3 for the ROV jet trenching is now complete.

Split pipe installation will be carried out by Divers from the Forth Jouster.

Split pipe operations are expected to commence 4th January for a period of 6 weeks, weather dependent.

 

Work Description The DSV Forth Warrior will be positioned on spud legs acting as a working platform for diving operations. Split pipe will be installed from the shore towards open sea, along the cable.

Divers will be in the water and may not be visible on the surface. Should any vessel wish to come within 500m of the vessels, then direct communication with either the Master / Operator or the guard vessel stationed nearby is required.

The vessels will display the appropriate lights / day shapes for their operations.

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Subsea Electricity Cables – Ullapool-Altnaharrie



Mariners should be aware that the subsea electricity cable between Ullapool-Altnaharrie has now been installed.


Mariners should be aware that the subsea electricity cable between Ullapool-Altnaharrie has now been installed. Charts and other datasets will be updated to reflect this new cable route once final as-laid positions have been received. In the meantime the attached design RPL for this cable can be used as guidance for the cable's approximate location.

 

Please also be aware that there are areas of cable exposure along this route, and mariners are requested to exercise caution when operating within the area.

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Subsea Electricity Cables – Mull-Coll and Carradale-Arran



Mariners should be aware that the subsea electricity cables between Mull to Coll and Carradale to Arran have now been installed.


Mariners should be aware that the subsea electricity cables between Mull to Coll and Carradale to Arran have now been installed. Charts and other datasets will be updated to reflect these new cable routes once final as-laid positions have been received. In the meantime the attached design RPLs for these cables can be used as guidance for the cables’ approximate locations.

 

Please also be aware that there are areas of cable exposure along these routes, and mariners are requested to exercise caution when operating within the area.

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Dogger Bank A & B OSP Dredging and Scour Protection Installation Campaign



Trailing Suction Hopper Dredger (TSHD) Pedro Alvares Cabral and Fall Pipe Vessel (FPV) Simon Stevin will perform dredging and subsea rock installation at the OSP locations of both DBA & DBB


TSHD Pedro Alvares Cabral will be performing her scope from mid-January till mid-February, planning her activities around a suitable weather window during this period. Following the dredging works, FPV Simon Stevin will install the rock foundation at both OSP locations. Start date will depend on the progress made by TSHD Pedro Alvares Cabral though the expected installation period for the Simon Stevin will be throughout February. Work will be continuous, 24 hours a day. 

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Geophysical survey - Kattegatt



Geophysical survey in the Kattegatt area using M/V Northern Wind call sign: 2IOX2 & Northern Storm Call sign: MISA7 from 15th December until 28th February 2023.


Please see attachment.

  • VESSEL: M/V NORTHERN WIND Call sign: 2IOX2
  • MANEUVERABILITY: LIMITED
  • EQUIPMENT: MULTIBEAM (HULL MOUNTED) SOUND VELOCITY PROFILER (TOWED)
  • TIME: 15TH OF DECEMBER 2022 TO 2ND OF JANUARY – 2023
  • AIM: HYDROGRAPHIC CONDITIONS FOR A WIND FARM

MV Northern Wind Calls sign: 2IOX2 Bridge: +46 8 558 030 39 Email: master-nw@clinton.se Contact person at Clinton Marine Survey: Notice to Mariners Martin Wikmar CEO +46 708 79 90 20 Philip Ljungström Project Manager +46 708 79 90 26

  • VESSEL: M/V NORTHERN WIND Calls sign: 2IOX2, M/V NORTHERN STORM Call sign: MISA7
  • MANEUVERABILITY: LIMITED
  • EQUIPMENT: MULTIBEAM & SUBBOTTOM PROFILER (HULL MOUNTED) SOUND VELOCITY PROFILER, SIDESCAN SONAR, MAGNETOMETER (TOWED)
  • TIME: 2ND OF JANUARY 2023 TO 28TH OF FEBRUARY – 2023
  • AIM: HYDROGRAPHIC CONDITIONS FOR A WIND FARM

M/V Northern Storm Calls sign: MISA7 Bridge: +46 31 30 11 132 Email: master-northernstorm@clinton.se Contact person at Clinton Marine Survey: Notice to Mariners Philip Ljungström Project Manager +46 708 79 90 26 Martin Wikmar CEO +46 708 79 90 20

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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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Celtic Sea FliDAR Deployments



Deployment of 2x FliDAR buoys in the 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) and Zone 5 (Welsh water), refer to locations in the coordinates table and chart below. Both buoys will be deployed from Falmouth harbour. The buoys will be in situ for 12 months (but up to 36 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. 
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Floating LiDAR buoys & metocean buoys - CampionWind



Mariners are advised that from the 10 September 2022, for a period of 13 months, two Floating LiDAR buoys and one Seawatch Midi metocean buoy with an Acoustic Doppler Current Profiler (ADCP) seabed mooring will be deployed within the CampionWind offshore wind farm array. Please maintain a 400 m clearance from the deployed equipment. Deployments will be carried out over 3 days from 10 September 2022; weather permitting. Operations will be completed by the Fishing vessel ‘Elizabeth’.


From the 10 September 2022, for a period of 13 months, two Floating LiDAR buoys and one Seawatch Midi metocean buoy with an Acoustic Doppler Current Profiler (ADCP) seabed mooring will be deployed within the CampionWind offshore wind farm array to record wind and metocean data.

All locations referred to are outlined in Table 1 and displayed in Figure 1 within the Notice to Mariners (provided as an attachment to this notice). These locations are all within the CampionWind offshore wind farm off the east coast of Scotland.

 

The Seawatch Midi metocean buoy and the FLiDAR buoys are yellow in colour and will exhibit a navigation light according to IALA standards: five (5) flashes at one (1) Hertz, every twenty (20) seconds (Fl (5) Y 20s). The ranges for the lights on the buoys are 5 nautical miles for both Seawatch Midi and the FLiDAR Buoys. All vessels are requested to maintain a safe distance (400m) from the deployed equipment at all times.

 

The secondary flidar buoy, SWLB060, see map and coordinates in the Notice to Mariners, has lost its AIS signal. As a result, the buoy is not actively transmitting its location, and is showing its position through lights and radar reflectors.

 

Further details can be found within the attached Notice to Mariners.

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Metocean Equipment Deployments at 3 sites within the SSE Ossian OWF



Partrac deployed the following array of metocean equipment at 3 sites within the Ossian floating offshore wind farm off the East coast of Scotland in August 2022: + Floating LiDAR buoy at sites 1 & 3 + Guard buoy at site 2 + Datawell Waverider buoy at sites 1,2 & 3 + Subsea mooring at sites 1,2 & 3 Metocean equipment will be deployed until August 2024, and maintenance visits will be undertaken every 3 months. Please maintain a 500m exclusion around each position.


FLOATING LIDAR BUOY The floating LiDAR buoys deployed at sites 1 and 3 records 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 lantern will have a flash sequence Fl (5) Y 20s. Please maintain a 500m exclusion around each buoy.

 

WAVEBUOY

The wavebuoy deployed at each site is a 1.1 m diameter yellow spherical buoy fitted with a flashing antenna with sequence Fl (5) Y 20s.

 

GUARD BUOY

The guard buoy deployed at site 2 comprises a yellow St Andrews Cross, radar reflector, and yellow navigation light. The light will have a flash sequence Fl (5) Y 20s.

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MCRP - MM - DOC - 0007 Morlais Scientific Activity Notification - SMRU PAM deployment



As part of the Marine Licence ORML1938 granted to Menter Môn Morlais, we are writing to you to notify you of the commencement of scientific activity where notification is required on the below date: DYDDIAD / DATE: 28/11/2022


Passive Acoustic Monitoring (PAM) - St Andrews University Sea Mammal Research Unit (SMRU) deployments in the Morlais tidal energy demonstration zone.

SMRU has installed equipment (Passive Acoustic Monitoring or PAM) on the seabed to gather acoustic data.

This document provides information on the PAM deployments for the local fishing industry and other sea users in the area.

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Foundation Installation Campaign - Dogger Bank A



The Offshore installation vessel, HLV Seaway Strashnov, has completed the second part of the monopile foundation installation campaign. Currently the HLV Seaway Strashnov is undergoing scheduled drydock maintenance.


The works will re-commence in March 2023, continuing until approximately Q3 2023 The works will be continuous 24 hours a day. Charts of the DBA construction area and foundation locations are provided.  A running list of the next locations to be installed and completed foundation locations will be presented in the Weekly Notice of Operations.

 

During operations, the HLV Seaway Strashnovwill 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.

 

During operations, a Statutory Safety zone of 500m radius will be in place around the HLV Seaway Strashnov during the installation of foundations.  The safety zones will be monitored by a guard vessel. The primary response will be to warn passing traffic of the ongoing works and any active safety zones, and to alert any vessels where an infringement may occur or has occurred.

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Survey - Llyr Offshore Wind Farm Nearshore



A geophysical and environmental survey will be carried out between 1st December and 28th February. The geophysical survey will employ Multi-beam Echo Sounder (MBES), Side-scan Sonar (SSS), High-resolution Sub-Bottom Profiler (SBP) and a single magnetometer. The environmental survey will acquire a drop down video footage and grab samples. All geophysical survey operations involve towed survey equipment (SSS, Magnetometer and SBP).


Please be advised that from the 1st of December 2022, N-SEA will be conducting geophysical and environmental surveys within the area shown in Chart 4, by the survey vessel ‘MV Coastal Observer’. Full vessel details are presented in paragraph 5 below. The survey will be carried out within the inshore section of the offshore export cable corridor starting at 3.0m physical depth and working out to -10.0m LAT.

The geophysical survey will employ Multi-beam Echo Sounder (MBES), Side-scan Sonar (SSS), a single magnetometer and Sub-bottom Profiler (SBP)[JHM5] [GL6] . All geophysical survey operations involve towed survey equipment (SSS and Magnetometer). During geophysical survey the vessel will be restricted in manoeuvrability All vessels which are operating within this area are requested to keep a 200 m distance from the MV Coastal Observer when it is restricted in its ability to manoeuvre and pass at minimum speed to reduce vessel wash.

The survey vessel will always be listening to VHF Channel 16 but can set any other channel as required. Throughout survey operations, the vessel will be displaying the appropriate lights and shapes as required under COLREGS Rule 27(b).   All mariners are reminded of their responsibilities under the International Collision Regulations and are reminded of Marine Notice No 17 of 2007 which gives general advice in relation to the activities of vessels engaged in survey work for hydrographic, seismic, fishing research and underwater operations.

All nearshore activities will be undertaken during daylight hours.

Fisheries liaison is being carried out by SeaSource Offshore, whose details are provided. If you would like further details regarding the geophysical and/or environmental surveys, please contact the Fisheries Liaison Officer using the contact details in Paragraph 6.

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Survey - Llyr Offshore Wind Farm



A geophysical and environmental survey will be carried out between 1st December and 28th February. The geophysical survey will employ Multi-beam Echo Sounder (MBES), Side-scan Sonar (SSS), High-resolution Sub-Bottom Profiler (SBP) and a single magnetometer. The environmental survey will acquire a drop down video footage and grab samples. All geophysical survey operations involve towed survey equipment (SSS, Magnetometer and SBP).


The notification is intended for circulation to all interested parties undertaking or managing activities in the vicinity of the planned survey works.

Please be advised that from the 1st of December 2022, N-SEA will be conducting geophysical and environmental surveys within the area shown in Chart 4 by the survey vessel ‘Braveheart Spirit’. Full vessel details are presented in paragraph 5 below. The survey consists of an offshore windfarm location, and its northern export cable route corridor. The geophysical survey will employ MBES, SSS, High-resolution Sub-Bottom Profiler, and a single magnetometer. The environmental survey will acquire drop down video footage and grab samples.

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

All geophysical survey operations involve towed survey equipment (Sidescan sonar (SSS), Magnetometer and Sub-Bottom Profiler (SBP)). During geophysical and environmental surveys when equipment is deployed the vessel will be restricted in manoeuvrability. All vessels which are operating within this area are requested to keep a 500 m distance from the Braveheart Spirit when it is restricted in its ability to manoeuvre and pass at minimum speed to reduce vessel wash. The survey vessel will always be listening to VHF Channel 16 but can set any other channel as required. Throughout survey operations, the vessel will be displaying the appropriate lights and shapes as required under COLREGS Rule 27(b). All mariners are reminded of their responsibilities under the International Collision Regulations and are reminded of Marine Notice No 17 of 2007 which gives general advice in relation to the activities of vessels engaged in survey work for hydrographic, seismic, fishing research and underwater operations.

All nearshore activities will be undertaken during daylight hours. All offshore activities will be undertaken on a 24 hour basis.

Fisheries liaison is being carried out by SeaSource Offshore, whose details are provided. If you would like further details regarding the geophysical and/or environmental surveys, please contact the N-Sea project manager using the contact details in Paragraph 6.

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Surface Laid Cable - The Whitley Bay Stub Route (2)



The installation of the Havhingsten fibre optic telecommunication Whitley Bay Stub Route has been completed. Due to challenging soil conditions and rocky seabed, there are sections of surface laid cable and areas with shallow burial. No further operations to bury this section of cable are planned due to the presence of rock. The cable is protected by the armoured cable type and from the BMH up to kilometre point (KP) 0.474 the cable is additionally protected by Articulated Pipe.


Please be advised that installation of the Havhingsten fibre optic telecommunication Whitley Bay Stub Route has been completed.

 

The supplier of the Havhingsten cable is Alcatel Submarine Networks (ASN). Intertek are the environmental and permitting consultants.

 

The Whitley Bay Stub Route has been installed between the Beach Man Hole (BMH) and the territorial sea limit but it will not yet be connected to the telecommunication network. This cable is to provide infrastructure for the network to expand relatively easily when demand is required within the next 10 - 15 years.

 

Due to challenging soil conditions and rocky seabed, there are sections of surface laid cable and areas with shallow burial (less than 0.20m burial depth), coordinates can be found below. No further operations to bury these sections of cable are planned due to the challenging soil conditions. The cable is protected by the armoured cable type and from the BMH up to kilometre point (KP) 0.474 the cable is additionally protected by Articulated Pipe.

 

Coordinates for the surface laid cable and shallow burial areas are provided in the attached Notice to Mariners.

 

Post-Lay Inspection & Burial (PLIB) by jetting for the section of surface laid cable close to the territorial sea limit was completed on the 1 November 2022.

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Surface Laid Cable - The Whitley Bay Stub Route (1)



The installation of the Havhingsten fibre optic telecommunication Whitley Bay Stub Route has been completed. Due to challenging soil conditions and rocky seabed, there are sections of surface laid cable and areas with shallow burial. No further operations to bury this section of cable are planned due to the presence of rock. The cable is protected by the armoured cable type and from the BMH up to kilometre point (KP) 0.474 the cable is additionally protected by Articulated Pipe.


Please be advised that installation of the Havhingsten fibre optic telecommunication Whitley Bay Stub Route has been completed.

 

The supplier of the Havhingsten cable is Alcatel Submarine Networks (ASN). Intertek are the environmental and permitting consultants.

 

The Whitley Bay Stub Route has been installed between the Beach Man Hole (BMH) and the territorial sea limit but it will not yet be connected to the telecommunication network. This cable is to provide infrastructure for the network to expand relatively easily when demand is required within the next 10 - 15 years.

 

Due to challenging soil conditions and rocky seabed, there are sections of surface laid cable and areas with shallow burial (less than 0.20m burial depth), coordinates can be found below. No further operations to bury these sections of cable are planned due to the challenging soil conditions. The cable is protected by the armoured cable type and from the BMH up to kilometre point (KP) 0.474 the cable is additionally protected by Articulated Pipe.

 

Coordinates for the surface laid cable and shallow burial areas are provided in the attached Notice to Mariners.

 

Post-Lay Inspection & Burial (PLIB) by jetting for the section of surface laid cable close to the territorial sea limit was completed on the 1 November 2022.

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Metocean Survey - West of Orkney Offshore Windfarm



The survey will commence on the 14 October 2022 and run through to 31 October 2023 using the vessel Green Isle and C-Force. The total duration for survey activity is expected to take 375 days, and additional days have been included in the duration to account for unforeseen operational and/or weather delays.


Contact details:

  • Onshore FLO: phone: +44 (0) 7926418820, email: OWPLFisheries@xodusgroup.com;
  • Offshore: T: +44(0)1856 851966 (office) M: +44(0)771 056 2605 (mobile)

 

  • Name of vessel carrying out the work and equipment used: Green Isle
  • Two floating Light Detection and Ranging (LiDAR) Systems (FLS);
  • One Wave Buoy; and
  • One Acoustic Doppler Current Profiler (ADCP).
  • Port of operation: Stromness, Scotland
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Deployment of Floating LiDAR Buoy and Subsea Metocean Mooring



On behalf of Floating Energy Allyance, Partrac Ltd. has deployed a Floating LiDAR Buoy and Subsea Metocean Mooring within the Buchan Offshore Wind Project site, located off the East coast of Scotland. The deployment was carried out on 28th November 2022, using the vessel Isle of Jura. The metocean equipment will be deployed for 2 years (24 months), and maintenance visits will be undertaken every 3 months.


FLOATING LIDAR BUOY: The floating LiDAR buoy records meteorological data. It is 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 (Figure 2). The lantern has a flash sequence Fl (5) Y 20s.

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



Partrac are to service and redeploy two metocean monitoring buoys near co-located guard buoys at two separate locations within the Dogger Bank South Project Area, approximately 65 miles and 80 miles east of Whitby, UK. Servicing operations are estimated to be carried out over three days from 29th November to the 1st of December 2022, weather permitting. 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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Floating LiDAR buoys & metocean buoys - MarramWind



Mariners are advised that from the 10 September 2022, for a period of 13 months, two Floating LiDAR buoys and one Seawatch Midi metocean buoy with an Acoustic Doppler Current Profiler (ADCP) seabed mooring will be deployed within the MarramWind offshore wind farm array. Please maintain a 400 m clearance from the deployed equipment. Deployments will be carried out over 3 days from 10 September 2022; weather permitting. Operations will be completed by the Fishing vessel ‘Elizabeth’.


From the 10 September 2022, for a period of 13 months, two Floating LiDAR buoys and one Seawatch Midi metocean buoy with an Acoustic Doppler Current Profiler (ADCP) seabed mooring will be deployed within the MarramWind offshore wind farm array to record wind and metocean data.

All locations referred to are outlined in Table 1 and displayed in Figure 1 within the Notice to Mariners (provided as an attachment to this notice). These locations are all within the MarramWind offshore wind farm off the east coast of Scotland.

 

The Seawatch Midi metocean buoy and the FLiDAR buoys are yellow in colour and will exhibit a navigation light according to IALA standards: five (5) flashes at one (1) Hertz, every twenty (20) seconds (Fl (5) Y 20s). The ranges for the lights on the buoys are 5 nautical miles for both Seawatch Midi and the FLiDAR Buoys. All vessels are requested to maintain a safe distance (400m) from the deployed equipment at all times.

 

Further details can be found within the attached Notice to Mariners.

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Shetland HVDC - Wet stored cable



Scottish Hydro Electric Transmission Plc, are installing the Shetland HVDC Link cable. As part of Campaign 1 installation activity, there is currently in place, a section of wet stored cable that is sensitive to any external impacts and constitutes a snagging risk for anchoring, fishing gear or other equipment with seabed intervention.


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

 

Fishing gear or other equipment with seabed intervention should not be deployed within the wet stored cable area from KP148.9 to KP156.3. Please see coordinates and chart attached.

 

Within the area KP148.9 to KP156.3 approx. 700m of the wet stored cable has a shallow burial depth of <40cm and a section of surface laid cable, a submerged buoy is attached to the end of the wet stored cable to aid retrieval of the cable. The wet stored cable will remain in place until completion of installation Campaign 3, expected in July 2023.

 

 

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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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Establishment of AIS AtoN at Moray East Met Mast Caisson



Please be advised that an Automatic Identification System (AIS) Aid to Navigation (AtoN) has been established to indicate the Moray East Met Mast Caisson.


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Morven Offshore Wind Farm Floating LiDAR and Metocean Survey



Metocean instrumentation and a floating LiDAR system (FLS) are planned for deployment within the boundary of the proposed Morven Offshore Wind Farm Project site in the North Sea. All instrumentation is planned for deployment within the Morven Project site in September 2022 until further notice.


Instrumentation was succesfully deployed on 19th October 2022 at the Morven Project site. A total of 2 metocean instrumentation moorings and one FLS mooring were deployed at each of two deployment locations within the Project site (known as Morven North and Morven South).

 

The metocean moorings comprise of one directional waverider buoy (DWR) which will is visible on the water surface, moored to the seabed through a combination of rope and rubber cords. The second metocean mooring is a subsurface ‘stumpy’ mooring which will not be visible at the water surface but will float approximately 5 m above the seabed. The FLS mooring comprises of a surface visible buoy moored to the seabed through a combination of rope and chain via a single point mooring.

 

Marine users are requested to maintain the safe clearance distances of 500m.

 

All equipment will be maintained in position via appropriate mooring systems and will gather metocean data to inform the proposed Project. Details of the surface present devices and relevant aids to navigation are provided in the attached NtM. 

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SSER Berwick Bank Offshore Windfarm - Geotech Survey - Interim 2B



Mariners are advised that SSE Renewables will be returning to Berwick Bank Wind Farm area to undertake further Geotechnical survey work. The survey will be within the proposed Berwick Bank Wind Farm site boundary.


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 Fugro and will be conducted from the vessel Fugro Scout. The geotechnical survey is due to start in October 2022. The scouting/guard vessel will be the Artemis.

 

The scope of work within the main array area will comprise up to 35 composite rotary boreholes advanced as a combination of sampling in sand and clay and CPT downhole pushes through suitable soils and then extended by rotary core drilling to depths up to 40 m below seabed.

 

During the campaign, the survey vessel will be deploying underwater equipment to obtain cores and 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). No towed equipment will be used.

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MetOcean Buoy Installation



Installation a floating LiDAR buoy and a Waverider buoy for met ocean data gathering. It is planned to install a floating LiDAR buoy and a Waverider buoy for met ocean data gathering. The port of mobilisation is Dundee and the installation will take place using a Multi-cat type vessel.


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Areas of Exposure & Suspension - Carradale to Arran North Subsea Cable



Mariners should be aware that the Carradale to Arran North cable has areas of exposure and suspension.


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Carradale - Arran South Subsea Power Cable areas of exposure



Mariners should be aware that the Carradale - Arran South subsea power cable has areas of exposure and suspension.


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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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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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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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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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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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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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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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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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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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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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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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