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Sound measurement study Hywind Scotland Pilot Park



Hywind Scotland Pilot Park is performing a sound measurement study where the purpose is to document the operational noise from floating offshore wind turbines and their substructures, mooring lines and cables.


As part of the Hywind Scotland Wind Park, Equinor has subcontracted Jasco Applied Sciences to perform sound recordings in the park area and in a control location in Buchan Deep (near cross over point between the FORTIES to CRUDEN Bay oil line and the GAS line). See map and positions below.

 

The purpose of the sound measurement study is to document the operational noise from floating offshore wind turbines and their substructures, mooring lines and cables. It is part of an internal Equinor Research &Technology project that aims to increase knowledge on possible environmental implications of floating offshore wind, i.e. in this particular study, the possible impact ranges of sound from the wind park on marine mammals and fish. The results from the sound measurement study is important also for further technology development.

 

The Equinor contracted “MCS Swath1” (crew vessel) will be used for the deployment and retrieval of the sound recorder equipment (hydrophones). The field activity in connection with both deployment and retrieval will take one day, however, the recording period will be approximately 3 months from ultimo October 2020 to ultimo January 2021.

 

The recorders were deployed October 21. Yet, no exact date is set for the retrieval of the equipment (ultimo January 2021).

 

All Equinor installed equipment shall remain in position for the duration of the survey, but all equipment will be removed from seabed when the recording period is over. Also, there will be no bouys on sea surface or lines in the water column. All equipment will be placed on sea floor at approximately 100 meters depth by the help of an anchoring plate, which fastens the equipment and eliminates drifting of equipment. The equipment will have a height of maximum 1 meter above seabed, and the plate mooring system has the dimension 914 x 527 x 864 mm.

 

This equipment collects data and information of environmental importance and could get damaged or lost if trawled over.

 

When the equipment is retrieved, the acoustic release will be activated and the equipment will be lifted by crane.

 

 

Positions for recorders in wind park and in control location

 

Location

Latitude

Longitude

Easting (m)†

Northing (m)†

Hywind Scotland

57° 29' 04.2741" N

1° 20' 33.8512" W

599357.410

6372534.418

Control

57° 31' 48.0000" N

1° 07' 33.6000" W

612209.809

6377933.954

 

 

 

Vessel Specification

 

Details of the vessel MCS Swath1 can be seen via the following document.

 

https://www.maritimecraft.co.uk/files/MCS-SWATH-1.pdf

 

According to information in the specification, a deck crane of load 500 kgs is installed. The crane and a mobile winch will be used to deploy and retrieve sound recording equipment.

 

 

 

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Lidar Deployment - East Anglia Two Wind Farm



The buoy has been temporarily recovered from site leaving some mooring components and the anchor weight on the seabed


The mooring and anchor weight remains on the seabed at the location. It should be noted that part of the remaining mooring is buoyant and therefore poses a risk of entanglement for passing vessels. To avoid risk of entanglement, vessels should allow a minimum 200 m clearance from the location.

The mooring design is specific to each SWLB deployment and location. The equipment is moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.

 

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Survey - Sofia Offshore Wind Farm



Mariners are advised that Fugro have completed Offshore Site Investigations along the export cable corridor of the Sofia Offshore Wind Farm (SOWF), with the recovery of metocean equipment expected to be completed over the next week.


Mariners are advised that the MMS Humber Engineer is expected on site over the next week to recover the the metocean equipment deployed in the nearshore area of the SOWF export cable route, following its initial deployment by the Curtis Marshall on or around 6th August 2020.  The date of works will however be dependent on prevailing weather conditions .

 

The deployment location is as follows (WGS_1984_UTM_Zone_31N):

 

Equipment Lat_DDM Long_DDM
Seabed Frame 54 36.471N 001 00.540W
Anchor Weight 54 36.474N 001 00.573W

 

The equipment comprises a seabed frame (housing an acoustic wave and current profiler), which is connected to an anchor weight via a combination wire groundline. The method of recovery involved the release of pop-up systems mounted on the seabed frame and anchor weight, therefore there is no surface marker buoy on site. The deployed equipment will not be marked on the surface.

 

As the MMS Humber Engineer will be recovering survey equipment from the vessel, it is requested that all vessels operating within this area keep their distance, maintaining at least the 500 m exclusion including in the survey area buffer (coordinates above), and pass at minimum speed to reduce vessel wash.

 

For further information:  Sally Dalrymple, Fugro, Tel: +44 7917 058751, email: s.dalrymple@fugro.com;

Nigel Proctor (FLO) Precision Marine Survey Ltd Tel: +44 7702 730891, email n.proctor@precisionmarine.co.uk

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Scientific mooring deployments - West of Orkney and Thurso Bay



Partrac Ltd. Installed marine sensors at 3 sites in Thurso bay and west of Orkney on Stormy bank, over the period 15th to 17th October 2020.


Sub-surface moorings will be deployed at three survey locations, each marked with a simple surface buoy positioned ~200m from the instrument location. A surface moored wave buoy will also be deployed at Survey point 5. The wave buoy is fitted with a 2m whip antenna, with a light sequence of Y.Fl.5(20s)

 

Instrumentation at Southern Stormy Bank relocated 

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Survey - Seagreen Offshore Windfarm



A Geophysical and Unexploded Ordnance survey on behalf of Seagreen Wind Energy. The survey will take place within the Seagreen Alpha and Seagreen Bravo export cable corridor. From 30th October for 1 week using vessel MV Olympic Artemis Call Sign: LAFV8.


The survey vessel is expected on site on the 30th of October though this may be delayed because of weather conditions or operational requirements. The expected duration of the works is 1 week (weather permitting, therefore there may be the potential for an extension to the work duration). The survey work will be conducted from the Offshore Supply vessel MV Olympic Artemis Call Sign: LAFV8

Survey Tasks

  • A remotely operated vehicle (ROV) will be deployed over the side of the vessel and survey will be executed within the boundaries of the export cable corridor.
  • During the survey campaign the vessel will be deploying a ROV. During such times the survey vessels will have restricted ability to manoeuvre and therefore all other vessels are requested to fully comply with COLREGS obligations in respect of this.
  • As a consequence of the survey equipment deployed and the modes of operation all mariners are advised to keep a safe clearance of no less than 500m aft of the vessel.
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Met Mast Decluttering and Survey - Moray Offshore Windfarm (East)



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) will be carrying out some De Cluttering and survey works on the Met Mast using support vessel Windcat 6 from the 23rd of October with expected completion being 29th of October


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Survey - 30km off the Coast of Ramsgate



Pole mounted multibeam echo-sounder survey of a subsea cable, approximately 30km of off the Coast of Ramsgate.


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Survey - Gwynt y Môr Windfarm



Benthic survey work is due to be carried out to the south and west of Gwynt y Môr Offshore windfarm during November 2020.


The vessel Aquatech Surveyor is due to undertake benthic drop down camera and Day grap survey for scientific monitoring purposes to the south and west of the Gwynt y Môr offshore windfarm.  The location of the survey work is shown in the Notice to Mariners.

 

Survey operations started during September 2020.  Work has paused to allow time for vessel maintenance and will resume in early-mid November 2020.  There will be approximately 5 days at sea, weather dependent.

 

The vessel will operate on a 24 hour basis from Holyhead in North Wales.  Survey operations will be limited to daylight hours with the vessel anchoring inshore overnight.

 

During the survey operations the vessel will be restricted in the ability to manoeuvre.

 

The vessel will remain on each survey station location for a period of approximately 15 minutes.  Umbilical cable may potentially trail from the vessel by up to 25m during deployment, depending on tidal conditions.

 

Other vessels are requested to keep well clear and pass slowly with a wide berth.

The survey vessel will monitor VHF Channel 16 at all times.

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Survey - Eastern HVDC Cable Torness to Hawthorn Pit



SSEN, National Grid and ST has contracted Fugro GM Marine Limited to carry out a Geophysical and Geotechnical site investigation located between Torness and Hawthorn Pit, United Kingdom, in the southern North Sea for the proposed Eastern HVDC Link site.


Scottish & Southern Electricity Networks Transmission (SSEN) as the Transmission Owner (TO) for northern Scotland, SP Transmission plc (SPT) as the TO for the central belt and south of Scotland, and National Grid Electricity Transmission plc (‘National Grid’) as the TO for England and Wales, are working together to develop the two links.

 

The Torness to Hawthorn Pit link will be jointly developed by SPT and National Grid. The link between Peterhead and Drax will be jointly developed by SSEN and National Grid. SSEN, National Grid and ST has contracted Fugro GM Marine Limited (Fugro) to carry out a Geophysical and Geotechnical site investigation located between Torness and Hawthorn Pit, United Kingdom, in the southern North Sea for the proposed Eastern HVDC Link site.

 

This Notice to Mariners will be updated and reissued periodically as additional vessels are planned to come on site. For operations in 2020, current planning indicates a total of 3 vessels being on site between the period 21st October 2020 and early December 2020. It should be noted these dates are subject to change and the total number of vessels could increase. Brown & May Marine (BMM) will distribute updated revisions of this notice as early possible before any additional vessels arrive on site. 

 

Offshore Geophysical Survey - (>15m LAT)  Fugro Venturer Call Sign: C6CG3

Offshore Geophysical operations at the Eastern HVDC Link site are expected to be carried out from the Fugro Venturer from the 21st October for approximately 5-6 weeks. Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress.

 

As the Fugro Venturer will be towing survey equipment the vessel will require large turning circles therefore it is requested that all vessels operating within this area keep their distance, maintaining at least the 1,000 m exclusion including in the survey area buffer (coordinates above), and pass at minimum speed to reduce vessel wash.

 

Survey operations will be conducted on a 24 hour basis.

 

Nearshore Geophysical Survey - (3-15m LAT)  Fugro Valkyrie Call Sign: 2BWA9

Nearshore Geophysical operations at the Eastern HVDC Link site are expected to be carried out from the Fugro Valkyrie from the 22nd October for approximately 6-7 weeks. Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress. It is expected that works will commence at Torness with subsequent transit to Hawthorn Pit.

 

As the Fugro Valkyrie will be towing survey equipment the vessel will require large turning circles therefore it is requested that all vessels operating within this area keep their distance, maintaining at least the 500 m exclusion including in the survey area buffer (coordinates above), and pass at minimum speed to reduce vessel wash.

 

Survey operations will be conducted on a daylight only basis (06:00 – 18:00).

 

 

Offshore Geotechnical Survey - (>15m LAT)  Fugro Venturer Call Sign: C6CG3

Offshore Geotechnical operations at the Eastern HVDC Link site are expected to be carried out from the Fugro Venturer from the 8th November for approximately 4 weeks. Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress.

As the Fugro Venturer will be towing survey equipment the vessel will require large turning circles therefore it is requested that all vessels operating within this area keep their distance, maintaining at least the 1,000 m exclusion including in the survey area buffer (coordinates above), and pass at minimum speed to reduce vessel wash.

 

Nearshore Geotechnical Survey - (3-15m LAT)  Coastal Chariot Call Sign: PCWZ

Nearshore Geotechnical operations at the Eastern HVDC Link site are expected to be carried out from the Coastal Chariot from the 28th October for approximately 2 weeks however this survey. Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress.

 

Survey operations will be conducted on a daylight only basis (06:00 – 18:00).

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Surface laid cable - Havhingsten, Eastern Irish Sea



Prior to rock placement there is a maximum of 50m of cable surface laid at a cable crossing. It is advised that extra care is taken when vessels are operating near this area and that no vessel should trawl within 250m.


Please be advised that, installation of the Havhingsten fibre optic telecommunication cable system is almost complete in the Eastern Irish Sea.

 

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

 

The entire cable system will comprise marine elements that pass from Denmark to the UK (NE region); from the UK (NW) to the Republic of Ireland; with two segments being installed into landfalls on the Isle of Man. 

 

The cable route for the eastern Irish Sea region (UK Northwest and Isle of Man) is shown below.

 

Installation was via industry standard burial tools including water jetting and ploughing. Cable burial has been performed to a target of 1.5m.

 

The Havhingsten cable crosses 2 pipelines within the Eastern Irish Sea, 1 of which will require external rock protection (Western HVDC link). Post-rock installation is now expected in March 2021. The cable crossing is located approximately 50km offshore.

 

Prior to rock placement there is a maximum of 25m of cable surface laid with Uraduct protection either side of the crossing. Coordinates of the crossing are provided in the table below. It is advised that extra care is taken when vessels are operating near the area and that no vessel should trawl within 250m from the listed coordinates.

Crossing

Approximate distance offshore (km)

Latitude

Longitude

Western HVDC Link

50

53°45.9867’ N

003°48.9137’ W

 

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Survey - Planned Cable Route English Channel



EGS (International) Ltd is continuing geophysical surveys of a planned cable route across the English Channel this summer, using our offshore survey vessels ‘EGS Pioneer’ Call Sign: 2EGS9 & EGS Echo Call Sign: MERD8


EGS Echo Call Sign: MERD8

The survey areas are in the shallows at each end of the route and are likely to be conducted over a 2-5 day period at each end. The French nearshore section is currently being surveyed and has been extended to late October. Following this the vessel will transit to the English side and perform surveys off Brighton, which will continue through to early November. The vessel will be operating on a 12-hour watch basis (daylight hours) and will display appropriate day shapes and lights during survey operations, maintaining a listening watch VHF CH16, with AIS transmission. The homeports will be Dieppe and Brighton Marina.

The survey equipment will include subsea towed systems and the vessel will be surveying at a speed of approximately 3-4 knots. EGS Echo will be steering along defined line plans, up and down blocks along the route, so please exercise caution around the vessel as significant course changes are likely. Echo will also be using high waters to extent the survey up each beach area and will require vessels to stay well away for safety (1nm+)

The initial survey corridor is 600m along the route and then this will be repeated, but with a corridor width of 200m (UXO survey). Survey Route: The general course of the route runs between Brighton, England and Dieppe, France. EGS ECHO.

 

Sampling: In addition to the main geophysical and UXO survey EGS Echo will be collecting some supplementary seabed samples, using a small van-Veen type grab. These will be collected within the 500m survey corridor, at a nominal spacing of 500m. The exact locations will be selected after review of the survey results, but will also avoid; rocky areas, obstacles, fishing gear etc.

 

 

EGS Pioneer Call Sign: 2EGS9

This survey is likely to continue over a 2-3-week period, starting around 20th October, and is scheduled to complete by the end of October to beginning of November, depending on weather conditions. The vessel will be operating on a 24-hour watch basis and will display appropriate day shapes and lights during survey operations, maintaining a listening watch VHF CH16, with AIS transmission.

The survey equipment will include subsea towed systems and the vessel will be surveying at a speed of approximately 3-4 knots. EGS Pioneer will be steering along defined line plans, up and down blocks along the route, so please exercise caution around the vessel as significant course changes are likely. The vessel will be working within a survey corridor of approximately 200m width along the route.

 

Survey Route: The general course of the route runs between Brighton, England and Dieppe, France. EGS Pioneer will be surveying on the French section at the start of the survey period and this will be completed before commencing work in the English sector.

 

Estimated survey dates for French sector: 19th Oct to 26th Oct Estimated survey dates for English Sector: 26th Oct to 9th Nov

 

 

 

 

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Soil plug removal operations - Moray East Offshore Windfarm



Please be advised that SPR operations will commence using the Boa Sub C , Atlantic Tonjer and Normand Energy ,Boa Sub C will also commence grouting ops within Moray East Offshore Windfarm Construction area from the 21st of June 2020 until further notice.


Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to re- commence soil plug removal operations using Boa Sub C, atlantic Tonger and Normand Energy in preparation for forthcoming jacket installation work scope within Moray East Offshore Windfarm Construction area circa 21st of June 2020 until further notice. 

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Rock Bag Placement & Boulder Clearance - Moray Offshore Windfarm (East)



Rock bag placement and boulder clearance operations at OSP1, OSP3 and Met Mast


Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to carry out Rock bag placement at OSP1 and OSP2. Following this they will commence boulder clearance operations with orange peel type grab at 53 WTG locations and the Offshore Met Mast. Expected duration of works is between 18-35 days, depending on weather, commencing circa 11/09/2020

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Subsea power cable - laying and trenching operations - Moray Offshore Windfarm (East)



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence (x3 export routes – wind farm to landfall) cable laying and trenching operations (two separate vessels) circa 27th July 2020


Vessel “NKT Victoria” will be laying the subsea power cables; three export cables between the Moray East offshore wind farm site and the cable landfall (via three separate drilled HDD ducts near Boyndie Bay). Vessel “Havila Phoenix” will be undertaking operations to bury these three subsea power cables below the seabed, via means of remotely operated trenching vehicles. Cable laying is expected to be completed by circa 3rd October 2020. Cable trenching is expected to be ongoing until early November but will be followed by a separate campaign to install remedial protection over the cables on any remaining unburied/unprotected sections. Details on remedial campaign(s) will be provided nearer the time of execution. The above dates include some weather contingency, however the operations may be subject to further extension.

 

Please be aware that by virtue of its mode of operation the NKT Victoria and Havila Phoenix will be Restricted in their Ability to Manoeuvre (RAM) 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 distance from the vessel of 500 metres when it is undertaking work and showing the appropriate shapes and lights in accordance with COLREGs Rule 18. Further updates and Weekly notice of operations can be accessed in the Moray East Website

 

https://www.morayeast.com/current-works/offshore-works

 

Note: Cable Trenching and Lay Activities Exclusion Zone area coordinates are being reviewed

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Dropped Object - Hornsea Two Offshore Wind Farm



Noise monitoring frame(steel 1m3 frame approx. 40kg), hydrophone,riser buoy,clumped(100kg chain clump weight) & 50m Dyneema riser line(dia.~25 mm)remain after the riser line was severed below the surface buoy.Surface marker buoy and pellet buoy recovered.


The riser line was severed below the surface buoy and it has not been possible to recover the items. Investigations as to the cause of the loss are ongoing.

 

Possible risk of entanglement from remaining riser line.

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Anchor Weight Chain 800kg - East Anglia One



There is most likely an anchor weight remaining on site. This is a bundle of approx. 800kg scrap anchor chain. Dimensions of object: Wave buoy mooring consisting: Anchor chain bundle: approx. 1.5 m x 2 m x 1 m


There is likely <0.5m presence of the anchor at the seabed so no risk to navigation is perceived.

 

There is a small potential for entanglement with fishing gear should trawling be undertaken in the area should equipment remain on seabed surface. No navigational risks are perceived.

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Construction of wind farm - Moray East



Due to the construction of the Moray East Offshore Wind Farm, there are several elements to this notice - safety zones; construction schedule; and buoy positions.


For background information about Moray East, please visit: www.morayoffshore.com/moray-east

 

Safety Zones

Please be advised that the Scottish Ministers have authorised the use of the safety zones during construction and operation of the Moray East Offshore Wind Farm as detailed below.

 

During construction

  • A 500 metre radius around each WTG and OSP where construction works are taking place that include sensitive activities being undertaken by vessels RAM. A maximum of three of such zones is permitted at any one time. 
  • A 50 metre radius around partially completed WTGs and OSPs where work is not underway and the risk assessments identify a need. 
  • A 50 metre radius around each completed WTG and OSP prior to commissioning and as required by a risk assessment process. 

During major maintenance

  • A 500 metre radius around all major maintenance works being undertaken around the WTGs and OSPs. No more than one major maintenance zone is permitted at any one time.

Construction Activities

It is currently anticipated that weather permitting offshore construction works will be carried out on a continuous basis (i.e. 24 hour working, seven days a week) unless notified otherwise.

 

Please be aware that by virtue of its mode of operation and the equipment deployed, construction vessels listed in the table below may be Restricted in their Ability to Manoeuvre 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 distance from these vessels of 500 metres when they are undertaking it work and showing the appropriate shapes and lights.  Further Notice to Mariners will be issued as construction progresses.

 

 

Company,

Vessel &

Call Sign

Survey Area

Survey Area

Start Timeframe & Duration

GV Replenish

MASY7

As above

As above

1st May 2019 for approximately 34 months

GV BOUNTIFUL

MJLF4

As above

As above

30th April 2020 for approximately 20 months

Seajack Scylla

3FSA3

As above

As above

29th June 2020 for approximately 12 months

Boa Sub C

LAGE8

As above As above 21st June 2020 for approximately 6 months

Windcat17

2BYDS

As above As above 9th August 2020 for approximately 2 months

C-Fenna

MBAH3

As above As above 6th July 2020 for approximately 4 months

C-Spartan

2BOO9

As above As above 6th July 2020 for approximately 4 months

 

     

Windcat 6

MXFD

As above As above from September 23rd 2020 onwards

GXS Viking

2EKH5

As above As above 14 th August 2020 for a year

GV Kinnaird 

GHNE

As above

As above

from 16th July 2020 onwards

 

     

GMS Endeavour

3UG6

As above As above 20th August 2020 onwards

Atlantic Tonjer

HOHO

As above As above 23rd September 2020 onwards

Normand Energy

MBEN9

As above As above 23rd September 2020 onwards
Maersk Connector As above As above 23rd September 2020 onwards
World Scirocco As above As above 1st October 2020 onwards
Living Stone As above As above 1st October 2020 onwards
Deep Cygnus As above As above 1st October 2020 onwards
Aquata As above As above 22nd August 2020 onwards
Havila Phoenix As above As above 22nd August 2020 onwards

Windcat 17

2BYD5

As above As above from July 23rd 2020 onwards
Viking As above As above from August 23rd 2020 onwards

 

 

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Havhingsten Cable Project - North Sea



Prior to rock placement there is a maximum of 50m of cable surface laid at each of the 4 crossings. It is advised that extra care is taken when vessels are operating near these areas and that no vessel should trawl within 250m from.


Please be advised that, installation of the Havhingsten fibre optic telecommunication cable system is complete outside of 12nm within the North Sea and at the Seaton Sluice landing. The Whitley Bay stub works are scheduled for March 2021.

 

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

 

The entire cable system will comprise marine elements that pass from Denmark to the UK (NE region); from the UK (NW) to the Republic of Ireland; with two segments being installed into landfalls on the Isle of Man. 

 

The cable route in the NE region is shown below. Landfall was made at Seaton Sluice.

 

Installation was via industry standard burial tools including water jetting and ploughing. Cable burial has been performed to a target of 2m.

 

The Havhingsten cable crosses 4 pipelines within the UK North Sea, which will require external rock protection. Post-rock installation is now expected in March 2021. The cable crossings start at approximately 72km offshore and beyond.

 

Prior to rock placement there is a maximum of 50m of cable surface laid with Uraduct protection at each of the 4 crossings. Coordinates of the crossings are provided in the table below. It is advised that extra care is taken when vessels are operating near these areas and that no vessel should trawl within 250m from the listed coordinates.

Crossing

Approximate distance offshore (km)

Latitude

Longitude

CATS

72

55°15.8028’ N

000°21.9318’ W

Norpipe

113

55° 19.1679’ N

000° 16.0266’ E

Sleipner to Easington

140

55° 22.3375’ N

000° 40.9323’ E

Shearwater to Bacton

198

55° 30.7194’ N

001° 34.1236’ E

 

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Deployment of Buoy - Blyth Met Mast



Deployment of a SeaWatch LiDAR Buoy (SWLB); this is a sea state measurement instrument.


The equipment will be deployed close to the Blyth Met Mast as part of a validation study within the existing met mast 250 m consent zone and will be deployed for approximately one month.

 

The equipment will be moored through a combination of steel chains, rope and rubber cord to approximately 2250 kg anchor weight at the seabed.

 

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

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Dropped Anchor - Gwynt y Mor Offshore Wind Farm



The original anchor consisting of approximately 350kg of scrap chain at the previously as laid position:53°28.615 N 003°30.192 W could not be recovered and remains on the sea bed.


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Deployment of Buoy - Project Erebus Floating Offshore Wind Farm



The Project Erebus Wave Buoy had broken free of its mooring but was successfully recovered in the evening of the 21.09.20. The Wave Buoy is to be redeployed at a different location than its original deployment.


They will be maintained in position via appropriate mooring systems for a 12-month period.

 

Floating LiDAR  Yellow 'X' Shaped Topmark Fl (5) Y 20s lilght (5nnm range) 

Wave Buoy   Yellow  Fl (5) Y 20s light (2-3nm range)

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Survey - Berwick Bank Wind Farm and Marr Bank Wind Farm



SSE Renewables will be undertaking a subtidal benthic survey of the Berwick Bank Wind Farm and Marr Bank Wind Farm areas, and cable routes.The survey will be within the proposed Berwick Bank and Marr Bank wind farm site boundaries and export cable routes.


The survey work is being undertaken by Ocean Ecology and will be conducted from the Marshall Art Call Sign: 2HWN3 and Seren Las Call Sign: MDAH2 vessels.

 

Survey Tasks The survey is to be split into 2 distinct areas using the offshore survey vessels: 1. Survey work covering the Berwick Bank Wind Farm and Marr Bank Wind Farm areas and the cable route further offshore in deeper water will be undertaken by the Marshall Art and will likely take approx. 10 days to complete (24hr operations possible) 2. Survey work covering the cable routes closer to shore in shallower waters will be undertaken by the Seren Las and will likely take 10 days to complete (12hr operations only)

During the survey campaign, the vessels will be deploying underwater equipment in order to gather data on the ecology of the seabed. These include grab sampling, drop down camera work and scientific beam trawls. However, despite equipment being deployed and the modes of operation, SSE Renewables are not requesting a 500m clearance at this time. The vessels will be generally unrestricted in their movements and will adhere to normal navigation protocol.

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Dropped Anchor Weight and Mooring



Anchor weight and mooring from lidar buoy, composed of approx 2250 kg scrap anchor chain, 19mm chain, 20 mm dyneema rope. Dimensions of object: Approx. 2.5 m2 (w) and 1 m height.


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Exposed Cable - Beatrice Offshore Windfarm



Rock Replacement Operations on a short area (4m) of partial exposure of Export Cable EC2 is in the vicinity of the mid cable joint at the location where the cable changes direction. Vessel MV Olympic Artemis Call sign: LAFV8. Work Commencement date TBC.


ROn behalf of Beatrice Offshore Windfarm Ltd, MV Olympic Artemis Call sign: LAFV8 will deploy rock bags over a four-metre section of exposed export cable.

 

Work Commencement date TBC.

 

During this operation the MV Olympic Artemis will be restricted in its ability to manoeuvre and will be displaying the appropriate lights and day signals. All vessels are there for requested to give a wide berth when passing.

 

At present the MFV Reaper is acting as a guard vessel at this location, further information is available in previously issued Beatrice notice to mariners NTM-BE-00005 - Export Cable Guard Vessel. MFV Reaper will remain on location throughout operations until the partial exposure has been proven to be satisfactorily covered.

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Telecom Marine Route Survey - West Coast Ireland



EGS (Asia) Ltd will be performing a geophysical survey of a planned cable route with Irish territorial waters, west of Galway. The survey will be conducted by vessel RV Ridley Thomas, call sign V7 JK2, from early September to end October 2020.


Please be avised that the R.V. Ridley Thomas, IMO 8112744, will be conducting telecommunication cable survey activities for an undersea fibre optic communications cable within Irish territorial waters, west of Galway, from around 10th September to end October 2020.

 

We kindly request that ships and fishing vessels keep a distance of at least 1 nm from the hydrographic survey vessel that will be towing a side scan sonar. We also kindly request that any set or drift gear, such as longlines, gillnets and pots/traps, be moved off the route by a distance of 0.5 nm on either side at the locations and during the periods noted above in order to avoid gear entanglement.

 

The work will include towed sonar survey and bottom sampling and will be performed 24/7. The cable route survey operations include a stern deployment of a sonar towfish tethered with steel cable at varying water depths to collect geophysical/bathymetric mapping data for the proposed undersea telecommunications cable. Towfish towing wire layback will be 3x water depth beind the vessel stern. The maximum depth of tow operations will be 1500 metres. The sonar sensor will be towed approximately 20-40 metres from the seafloor. The survey corridor is 1000 metres centred on the survey centreline. Operations in water depths greater than 1500 metres will utilise hull mounted equipment only.

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Deployment of Buoys - Hornsea Project Two



Ørsted have deployed a 'measurement buoy', as well as two 'transponder buckets' as part of construction of the Hornsea Project Two Offshore Wind Farm.


The devices have been placed within the Order Limits of the Hornsea Project Two offshore wind farm.

 

Note that these devices will remain on location throughout construction of the Hornsea Project Two Offshore Wind Farm and mariners should take note of their presence.

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Construction of Wind Farm (Neart na Gaoithe)



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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Construction of Wind Farm (Triton Knoll)



Activities are continuing related to the development of the Triton Knoll wind farm. For background information visit: http://www.tritonknoll.co.uk/


Mariners are advised of the offshore construction status at the Triton Knoll Offshore Wind Farm:

 

The following vessels will commence operations at Triton Knoll Offshore Wind Farm

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

HBC Achiever Diving Support Vessel OWMH2 219305000 9647978 Grimsby 01/10/2020

 

Operating predominantly within the Triton Knoll Offshore Wind Farm Array.  Activities include, Inter Array Cable Installation and Burial, Crew Transfer Operations, Guard Vessel Operations, Demarcation Buoyage Maintenance, Commissioning of Offshore Sub Stations, Rock Placement & Secondary Works on Installed Foundations.

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Sorrento

Guard Vessel

SXLE

235087639

N/A

Grimsby

28/12/2019

Precision 1

Guard Vessel

2FCD2

235089165

N/A

Hull

28/12/2019

Seacat Intrepid

Crew Transfer

2HWU6

235107284

N/A

Grimsby

02/01/2020

Esvagt Froude

Service Operations Vessel

OWWN2

219590000

9703461

Grimsby

02/02/2020

Esvagt Wind 1

High Speed Craft

XPE6305

219019815

N/A

Esvagt Froude

02/02/2020

Seacat Courageous

Crew Transfer Vessel

2IDC8

235108711

N/A

Grimsby

25/04/2020

Spirit Cable Installation Vessel 5BWK4 212471000 9496458 Rotterdam / Hull 26/06/2020
Siem Day Service Operations Vessel LAFB6 257651000 9660102 Rotterdam / Hull 27/06/2020
Drifa Guard Vessel HP7331 355507000 8133138 Den Helder 01/07/2020
Ndeavor Cable Installation Vessel 5BVG3 209852000 9650212 Rotterdam / Hull 05/07/2020
MCS Blue Norther High Speed Craft 2GDD5 235096374 9662435 Grimsby 02/07/2020
MCS Pampero High Speed Craft 2FKV2 235092103 9678628 Grimsby 02/07/2020
Afon Wen Buoy Maintenance Vessel 5BRK2 209945000 9473652 Hull 01/03/2020

Dalby Don

Crew Transfer Vessel

2IMZ6

235111112

N/A

Grimsby

18/02/2020

MCS Sirocco Crew Transfer Vessel 2FFP4 235090843 9643746 Grimsby 15/09/2020
Seacat Magic Crew Transfer Vessel 2JDI2 235114973 n/a Grimsby 24/09/2020

 

Vessels operating within both Triton Knoll Offshore Wind Farm Export Cable Route.  Activities include Guard Vessel Duties & Rock Placement.

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Glomar Arctic

Guard Vessel

HO9083

371278000

8711473

Den Helder

05/06/2020

Glomar Advance

Guard Vessel

HO5178

370048000

8205814

Den Helder

25/06/2020

Rockpiper Rock Placement Vessel 5BML3 209449000 9583861 Jelsa 08/10/2020
 

*** 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.

 

Demarcation Buoys

Partrac Ltd have deployed x12 Demarcation Buoys and x2 Metocean Buoy at the Triton Knoll Offshore Wind Farm (TKOWF) to mark the perimeter of the TKOWF site boundaries.

 

Vessels are requested to leave a wide berth during the installation operations. The buoys will be deployed for a period of two years, and all equipment will be removed at the end of the installation.

 

Buoy

Structure

Latitude

Longitude

Individual Specification

TK01

South Cardinal

53°24.054'N

000°57.935'E

Pillar shaped with a south cardinal shaped top mark, exhibiting a Q (6) + L Fl 15s light character (5 nm nominal light range)  RECOVERED

TK02

Special Mark

53°24.568'N

000°54.433'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK03

Special Mark

53°26.132'N

000°50.008'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK04

Special Mark

53°27.457'N

000°45.927'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK05

South Cardinal

53°28.859'N

000°41.181'E

Pillar shaped with a south cardinal shaped top mark, exhibiting a VQ (6) + L Fl 10s light character (5 nm nominal light range)   RECOVERED

TK06

Special Mark

53°30.807'N

000°41.826'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK07

North Cardinal

53°32.196'N

000°44.248'E

Pillar shaped with a north cardinal shaped top mark, exhibiting a Very Quick (VQ) light character (5 nm nominal light range)

TK08

Special Mark

53°32.444'N

000°47.678'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range

TK09

North Cardinal

53°32.428'N

000°52.040'E

Pillar shaped with a north cardinal shaped top mark, exhibiting a Q light character (5 nm nominal light range)

TK10

Special Mark

53°29.595'N

000°55.306'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5 second (s) light character (5 nm nominal light range)

TK11

Special Mark

53°26.979'N

000°57.974'E

Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character (5 nm nominal light range)

TK12

East Cardinal

53°24.368'N

001°00.228'E

Pillar shaped with an east cardinal shaped top mark, exhibiting a Q (3) 10s light character (5nm nominal light range)

TK13

Metocean Buoy

53°26.002'N

000°55.091'E

Triaxys metocean wave and current buoy (South) exhibiting a Fl (5) Y 20s light character (3 nm nominal light range)

TK14

Metocean Buoy

53°30.581'N

000°47.944'E

Triaxys metocean wave and current buoy (North) exhibiting a Fl (5) Y 20s light character (3 nm nominal light range)

 

Notice to Mariners Currently in Force

017/2020 - 18th September 2020

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Cable Installation - Havhingsten (Irish Sea)



The installation of the Havhingsten fibre optic telecommunication cable system has been granted marine licences and installation of the offshore section is expected to start on or around Friday 9 October 2020 in the Irish Sea.


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

 

The entire cable system will comprise marine elements that pass from Denmark to the UK (NE region); from the UK (NW) to the Republic of Ireland; with two segments being installed into landfalls on the Isle of Man. 

 

The proposed NW cable route

Landfall will be made at Squires Gate Lane and the cable will include two branches into the Isle of Man.

 

Installation will be via industry standard burial tools including water jetting and ploughing. Target cable burial depth is 1.5m below seabed level in the Irish Sea region.

 

It is anticipated that installation operations in UK waters will occupy up to a maximum 500m width of the seabed (250m either side of cable). The cable itself will occupy only 40mm of the seabed.

 

Expected speed of installation will be 17 km per day.

 

Planned durations of works within the Territorial Sea limit (0-12 nm) are as per below (exclusive of weather):

 

Area Pre-Lay Grapnel Run Installation Post-Lay Inspection & Burial
UK West TW 29 September 30 sept - 1 Oct 3 - 11 October
UK West TW (inshore of 15m water depth) 30 September 30 Sept - 1 Oct 3 - 11 October
UK West TW (inshore of 15m water depth) 18 - 19 September 7 - 12 October 28 - 29 November

 

Planned durations of works offshore (12-200nm) are as per below (exclusive of weather):

 

Area Pre-Lay Grapnel Run Installation Post-Lay Inspection & Burial Post-Rock Placement
UK West EEZ 17 - 18 September 7 Oct - 12 Oct 29 - 30 November March 2021
UK West EEZ 18 -19 September 12 Oct - 18 Oct 30 Nov  - 1 Dec N/A

 

There will be also be associated rock placement operations post cable installation at one (1) location within UK waters listed below.

 

Rock Placement Location Name

Latitude

Longitude

Western HVDC Crossing Segment 1.5

53° 45.9867’ N

003° 48.9137’ W

 

Vessels will be working throughout 24 hours and will display appropriate day shapes and lights during reduced visibility and night operations.

 

The proposed cable route in the IoM region

The cable route is proposed to cross the Irish Sea from Loughshinny (north of Dublin in Ireland) to Squires Gate Lane (south of Blackpool on the west coast of the UK). This section of the cable route will include two branches into the Isle of Man. With landfalls at Port Erin and Port Grenaugh.

 

Installation will be via industry standard burial tools including water jetting and ploughing. Target cable burial depth is 1.5m below seabed level in the Irish Sea region.

 

It is anticipated that installation operations in UK waters will occupy up to a maximum 500m width of the seabed (250m either side of cable). The cable itself will occupy only 40mm of the seabed.

 

Expected speed of installation will be 17 km per day. With the planned installation taking approx. 7.5 days.

Currently there are no proposed rock dump sites within the IoM region.

 

There will be also be associated rock placement operations post cable installation at the two (2) locations within IoM waters listed below.

 

Rock Placement Location Name

Latitude

Longitude

Western HVDC Crossing Segment 1.2

54° 54.7007’ N

004° 58.3552’ W

Western HVDC Crossing Segment 1.4

53° 53.8396’ N

004° 34.1792’ W

 

All fishing vessels are requested to maintain an appropriate and safe distance of 500 m when passing the cable installation vessels whilst operational and should pass at the lowest possible speed to avoid vessel wash effects.

Vessels will be working throughout 24 hours and will display appropriate day shapes and lights during reduced visibility and night operations.

 

Vessels will be working throughout 24 hours and will display appropriate day shapes and lights during reduced visibility and night operations.

 

Details of vessels proposed to be used are provided below:

 

Cable Installation Vessel: Nora B (Grapnel Run) Call Sign: PDKG                                                        

Length Overall:                                36m

Breadth:                                            15m     

 

Cable Installation Vessel: Ile de Brehat Call Sign: FOUC  (Known as Ile de Class)                                         

Length Overall:                                140.36m

Breadth:                                            23.40m 

                   

Cable Installation Support Vessel: Ile d’Aix Call Sign: PDKG                                                                                                      

Installation support vessel working on shore ends and post-lay inspection and burial

Length Overall:                                151.54 m

Breadth:                                            21.60 m

 

Bravenes (Rock Placement

Vessel)   Call Sign: PDCF                                                                                                   

 

Length Overall:                                167 m

Breadth:                                            26 m

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Cable Installation - Havhingsten (North Sea)



Please be advised that, installation of the Havhingsten fibre optic telecommunication cable system is planned to commence from mid-September onwards. Further details below.


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

 

The entire cable system will comprise marine elements that pass from Denmark to the UK (NE region); from the UK (NW) to the Republic of Ireland; with two segments being installed into landfalls on the Isle of Man. 

 

The proposed cable route in the NE.

 

Landfall will be made at Seaton Sluice.

 

Installation will be via industry standard burial tools including water jetting and ploughing. Target cable burial depth is 2m below seabed level in the North Sea region.

 

It is anticipated that installation operations in UK waters will occupy up to a maximum 500m width of the seabed (250m either side of cable). The cable itself will occupy only 40mm of the seabed.

 

Expected speed of installation will be 17 km per day.

 

Planned durations of works are as per below:

 

Planned timings of works within the Territorial Sea limit (0-12 nm) are as per below (exclusive of weather):

 

Area

Block no.

Pre-Lay Grapnel Run

Installation

UK East (TS)

2

Completed

30 Sep – 2 Oct

UK East (TS)

1

Completed

30 Sep – 2 Oct

 

 

Planned durations of works offshore (12-200nm) are as per below (exclusive of weather):

 

Area

Block no.

Pre-rock placement

PLGR

Installation

PLIB

Post-rock placement

UK East (EEZ)

6

NA

Completed

Completed

NA

NA

UK East (EEZ)

5

NA

Completed

Completed

NA

NA

UK East (EEZ)

4

Completed

Completed

Completed

29 Sep – 4 Oct

March 2021

UK East (EEZ)

3

NA

Completed

Completed

4 -6 October

March 2021

UK East (EEZ)

2

Completed

Completed

23 - 26 September

30 Sep – 2 Oct

March 2021

UK East (EEZ)

1

NA

Completed

26 - 30 September

NA

March 2021

 

 

There will be also be associated rock placement operations post cable installation at the four (4) locations within UK waters listed below. There will also be associated pre-lay rock placement at CATS and Shell pipelines.

 

Rock Placement Location Name

Latitude

Longitude

Shearwater to Bacton  

55 ° 30.7307' N

01° 34.1312' E

Sleipner to Easington

55° 22.3285' N

0° 40.8843' E

Norpipe Pipeline

55° 19.1729' N

0° 16.0142' E

Cats Pipeline

55° 15.8120' N

0° 21.9184' W

 

All fishing vessels are requested to maintain an appropriate and safe distance of 500 m when passing the cable installation vessels whilst operational and should pass at the lowest possible speed to avoid vessel wash effects.

 

Vessels will be working throughout 24 hours and will display appropriate day shapes and lights during reduced visibility and night operations.

 

Details of vessels proposed to be used are provided below:

 

Cable Installation Vessel: Ile de Batz (known as Ile de Class)                                                                        

DP Type

Length Overall:                                140.36 m

Breadth:                                            23.40 m                             

 

Cable Installation Support Vessel: Ile d’Aix                                                                                                       

Installation support vessel working on shore ends and post-lay inspection and burial

Length Overall:                                151.54 m

Breadth:                                            21.60 m

 

Bravenes (Rock Placement Vessel)                                                                                                             

DP Type

Length Overall:                                155 m

Breadth:                                            28 m

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Triton Knoll OWF - Movement of Demarcation Buoys



Please be advised that demarcation buoys TK10 and TK12 located at the Triton Knoll Offshore Wind Farm construction site have moved slightly from their previous location.


Mariners are advised that the following demarcation buoys outlining the Triton Knoll construction site have moved location as outlined below

TK10 Special mark – has moved south approximately 150 metres from original location. TK12 East Cardinal – has moved south approximately 100metres from the original location.

 

Buoy Type Designation Characteristics Original Position New Position
Special Mark TK10 Fl.Y.5s 53°29’.60N 000°55’.31E 53°29’.51N 000°55’.31E
East Cardinal TK12 Q(3) 10s 53°24’.37N 001°00’.23E 53°24’.31N 001°00’.23E

 

Mariners are advised to avoid entering these areas at all times. For up to date information please contact Guard Vessel Sorrento VHF Ch16 & VHF Ch10. Triton Knoll Marine Coordination Centre can be contacted by phone or Email on the below details for further information.

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Seagreen Offshore Windfarm, Seabed Obstruction



During survey operations a survey rod has been left protruding 1.8m from the seabed in position 56-35.909N 001-45.607W, this object constitutes a hazard to fishing vessels.


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Export Cable Installation - Triton Knoll Offshore Wind Farm



Please be advised that associated vessels will be carrying out Cable Installation operations in the Triton Knoll Offshore Wind Farm export cable corridor.


A 1500m clearance zone needs to be maintained around the main vessel.

 

During this period, the cable installation vessels will utilise pre-defined areas along the export cable route for temporary storage of anchors as detailed in the following of coordinates.  All wet stored anchors are expected to be visible on the waterline with the support of a buoy arrangement complete with white flashing marker light. Mariners should therefore be advised to avoid entering these areas, and where possible, give the area a wide berth.

 

The vessel 'Rockpiper' is expected on site on or around the 01st October 2020 to commence rock placement operations. Guard vessels 'Glomar Arctic' and 'Glomar Advantage' will be employed to support export cable installation operation.

 

Near Shore Anderby Creek Wet Stowage 1

Ref:

Latitude:

Longitude:

1

53’ 16.41 N

000’ 20.28 E

2

53’ 16.43 N

000’ 20.55 E

3

53’ 16.28 N

000’ 20.30 E

4

53’ 16.30 N

000’ 20.56 E

 

Offshore Wet Stowage 2

Ref:

Latitude:

Longitude:

1

53’ 18.85 N

000’ 25.90 E

2

53’ 18.80 N

000’ 26.10 E

3

53’ 18.25 N

000’ 25.60 E

4

53’ 18.20 N

000’ 25.80 E

 

Offshore Wet Stowage 3

Ref:

Latitude:

Longitude:

1

53’ 20.56 N

000’ 43.93 E

2

53’ 20.73 N

000’ 43.68 E

3

53’ 21.16 N

000’ 44.48 E

4

53’ 21.00 N

000’ 44.73 E

 

Offshore Wet Stowage 4

Ref:

Latitude:

Longitude:

1

53’ 25.55 N

000’ 50.20 E

2

53’ 25.65 N

000’ 49.91 E

3

53’ 26.23 N

000’ 50.60 E

4

53’ 26.13 N

000’ 50.86 E

 

During operations all vessels will be contactable on VHF Ch16. For up to date information, contact the guard vessel 'Sorrento' on marine VHF CH16 and Ch10.

 

Operational vessels and their details are as follows:

 

Vessel Name Vessel Type Call Sign MMSI Number IMO Operating Port Commence Date

Glomar Arctic

Guard Vessel

HO9083

371278000

8711473 Den Helder 05/06/2020

Glomar Advance

Guard Vessel

HO5178

370048000

8205814 Den Helder 25/06/2020
Rockpiper Rock Placement Vessel 5BML3 209449000 9583861 Jelsa 01/10/2020

 

For further information: Lee Cornwall, Triton Knoll Offshore Wind Farm, Tel: +44 (0) 7384 807293, email: l.cornwell@tritonknoll.co.uk

Triton Knoll Marine Coordination Centre, Mob Tel: +44 (0) 7384 807528, Tel: 0045 8213 6219, Email: tkmcc@smchse.com

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Unprotected HVDC electric cable section



East of the “South Falls” in UK waters a section of the HVDC Interconnector Nemo Link is unprotected due to seabed mobility.


East of the “South Falls” in UK waters a section of the HVDC Interconnector Nemo Link is unprotected due to seabed mobility. All Mariners are asked to avoid this area and not perform bottom-disturbing activities including trawl fishing to prevent damage to the cable.

 

Location: South Falls

 

Id

Easting (UTM31-WGS84)

Northing (UTM31-WGS84)

Lon

Lat

1

415023,18

5686893,81

1° 46.822' E

51° 19.619' N

2

415149,81

5686888,91

1° 46.931' E

51° 19.617' N

3

415149,99

5686882,90

1° 46.931' E

51° 19.614' N

4

415022,61

5686887,83

1° 46.822' E

51° 19.616' N

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Accommodation - Offshore Substation Platforms Moray Offshore Windfarm (East)



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to deploy the Jack Up Vessel GMS Endeavour to Site 1. The vessel will supply accommodation for workers carrying out commissioning works on the offshore substations.


The vessel will be located next to the structures highlighted in the map commencing circa 20/08/2020 until further notice.

 

Vessel info:

Name: 3GSM Endevour

General description and dimensions: LOA: 84.1 m, Beam: 36 m, Draught 5.9m Call Sign: 3EUG6 MMSI: 370582000 On Board Contact: Master Offshore Manager / Party Chief: John Bromfield E-mail: endeavour.6102@fleet.gmsuae.com Onshore Representative: Andrew Small

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Deployment of Buoy - Neart na Gaoithe Offshore Wind Farm



Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) successfully deployed a Wave Rider Buoy (WRB) within the Wind Farm Area on 12th Sept 2020. The intention is that this buoy will remain in situ within the NnG Wind Farm site for up to 2 years (Sept 2022)


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Dropped Cylindrical Pipe



Material is smooth cylindrical pipe drill casing. Dimensions of object: 12.2m x 0.2m presumed to be laying horizontal / sub-horizontal on the sea bed. May present some ‘snagging’ risk to fishing gear or similar. Planned Recovery of Item.


Details of any radio Navigational Warnings and/or Notices to Mariner’s:

 

  • None as yet, but geotechnical spread remains at site and in a position to guard and notify as required.
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Inter Array Cable Installation Operations



Moray East are planning on carrying out the Inter Array cable installation on the Moray East Windfarm


Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to carry out Inter Array cable installation works within the bounds of site 1 (see Figure 1 and Table 1). The cable pull ins and free lay of inter array cable between WTG’s will be carried out by the Living stone vessel along with WROV surveys once cable is installed. The Living stone will be supported by Grand Canyon She will be operating a walk to work system for personnel access to the WTG locations and transferring equipment to assist the cable pull ins. Both vessels will be supported by the Crew Transfer vessel World Scirocco, that will assist in personnel transfers to WTGs and carrying out crew changes for both vessels. The overall work scope will be carried out in 3 campaigns, the first campaign commencing circa the 24th of September 2020 and is expected to last 8 weeks. The following campaign commencement dates will be advised through further NtMs and in the Weekly Notice of Operations.

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Survey - Seagreen Offshore Windfarm



Seagreen Offshore Windfarm Ltd will conduct a geotechnical survey within the boundary of the Seagreen site.


A geotechnical survey will be conducted within the boundary of the Seagreen Offshore Windfarm site. The survey vessel, M/V Despina, will mobilise on or after the 18th of September 2020. Weather permitting, the survey is expected to conclude on or around the 30th of November 2020. The vessel will perfom various core penetration tests and vibro cores within the boundary of the site.

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Relocated Unexploded Ordnance - Neart na Gaoithe Offshore Wind Farm



Following unsuccessful clearance activities at some of the confirmed Unexploded Ordnance (UXO) items, six UXOs have been relocated to date within the Neart na Gaoithe (NnG) Offshore Wind Farm and Export Cable Corridor.


These UXO items either do not contain a fuse or are confirmed as solid shots and clearance by detonation is not likely to be possible. As such, relocation of the item is necessary. The item will be relocated to a position outwith the construction areas, but within the boundaries of the NnG licensed area, as permitted by the Marine Licence.

 

Latitude Longitude Target
56°14.752’N 02°18.472’W G_MAG_0029
56°14.760’N 02°18.474’W G_MAG_0010
56°14.154’N 02°14.886’W E_MAG_0683
56°13.677’N 02°18.681’W ERC_O_MAG_0332_A
56°14.955’N 02°17.445’W E_MAG_0068
56°14.953’N 02°17.437’W E_MAG_0070
56°14.607’N 02°17.618’W E_MAG_0036
56°15.399’N 02°19.521’W G_MAG_0109
56°14.766'N 02°17.025’W E_MAG_0227
56°14.131’N 02°18.011’W E_MAG_0008
56°14.568’N 02°18.617’W E_MAG_0018
56°15.875’N 02°14.986’W C_MAG_0070
56°13.739’N 02°18.685’W ECR_O_MAG_0362_A
56°13.784’N 02°18.671’W ECR_O_MAG_0378
56°02.740’N 02°21.208’W ECR_M_MAG_0708
56°17.788’N 02°16.833’W B_MAG_0200

 

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Nearshore Duct Preparation Scope - Triton Knoll Offshore Wind Farm



Boskalis and Triton Knoll would like to inform mariners that the Triton Knoll Offshore Wind Farm – Nearshore Duct Preparations in the Triton Knoll Offshore Windfarm Project Area.


The Voe Vanguard will be carrying out Nearshore Duct Preparations Works at the Triton Knoll OWF development for approximately 2 weeks, with works due to commence on or around the 14th May 2020.  The Support Vessel 'CRC Voyager' will commute to and from the works area, from Grimsby.

 

During operations, the Voe Vanguard can be contacted on VHF channel 16 throughout.

 

A 500 metre clearance should be maintained around the following works vessels.

 

Main Vessel: Voe Vanguard - MBEN9

Support Vessel: CRC Voyager -  MBZZ7

 

For further project information, please contact Lee Cornwell (Triton Knoll Offshore Wind Farm); Tel: +44 (0) 7384 807293; Email: l.cornwell@tritonknoll.co.uk

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Export Cable Installation - Hornsea Project Two



Ørsted have commenced the dredging scope for export cable installation and will be commencing pre-lay grapnel run activities on or around the 23rd August 2020 and are continuing construction of the Hornsea Project Two Offshore Wind Farm.


Array Cable Seabed Preparation and Installation World Marine Offshore will be commencing pre-lay grapnel run activities using the Wilson Adriatic Call Sign: OYOJ2 on or around 23rd August 2020. Cable installation and burial activities will commence in Q1 2020 through to Q2 2021. Works will be continual and intermittent throughout this period. The works will be undertaken by a number of vessels at different times according to the Project schedule

 

Note that the vessels will have limited manoeuvrability, some vessels will be operating on anchors, and it is requested that all vessels operating near the vessels maintain a safe distance (at least 500m) and pass all vessels at minimum speed.

 

The Boskalis will be temporarily wet storing a cable at the location provided on or around 9th September until 7th October 2020. A guard vessel will be present whilst the cable is being wet stored but it is advised that mariners maintain a safe clearance. Boskalis will be commencing trenching with the Boka Falcon on or around the 10th September to 12th October 2020.

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Survey - Dogger Bank



MMT will undertake a geophysical survey in UK Dogger Bank, UK exclusive economic zone (EEZ). The works will be undertaken within the Dogger Bank A and Dogger Bank B project areas, along with the export cable corridor from land out to both these areas.


A detailed survey is being carried out along several corridors within the survey area. Equipment deployed: hull mounted Multibeam sonar and towed equipment up to 300 m behind the vessel consisting of Side scan sonar and multiple Magnetometers within a ROTV frame within 5 m of the seabed. When underwater survey equipment is deployed, the survey vessels may have restricted ability to manoeuvre and other vessels are requested to pass at a safe speed and distance (at least 500 m).

 

The offshore survey programme commenced on the 23rd June 2020 in Dogger Bank A utilising the vessel Franklin Call Sign: OZ2102. Survey operations in Dogger Bank A and B are expected to be completed on 25th of July. After that, survey will take place along the export routes moving from east to west and end on 12th of August (subject to extension if the weather becomes poor). As a contingency, Franklin might work in Block 03 ahead of time if the weather becomes poor in the bank area but only after carefully scouting for fishing gear first.

 

The next phase of the offshore survey work is UXO survey in selected areas within the boundaries of the geophysical survey area. Note that the dates overlap, this is to account for potential delays caused by e.g. weather.

 

Survey Area Start Date End Date
D 15-09-2020 07-102020
C 02-10-2020 15-10-2020
B 10-10-2020 23-10-2020
A 17-10-2020 05-11-20202

 

Nearshore works along the export cable corridor (inside of the 15m contour) are expected to commence on 20th July and end on the 26th of August (subject to extension if the weather becomes poor).

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Power Cable - Loch Etive



Power cable installed by Briggs Marine Contractors on behalf of Green Highland Renewables across Loch Etive (north of Oban in Scotland).


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Dropped drill pipe and collars (2,300kg / 33 metres)



Fugro has reported the loss of 33 metres of drill pipe, weighing a total of 2300kg from the MV Normand Flower whilst working on East Anglia 1 North wind farm. It is not known whether the item is sticking up above the seabed at this stage. Further info...


Dimensions of object: ~33 m of steel drill string consisting of: 4 X Drill Collars (each ~4.5 m long, ~8 inch diameter and ~500 kg in weight) 1 X API Drill String ~9 m long, 4.5 inch diameter and ~300kg weight

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Floating LiDAR System - Seagreen Alpha and Bravo windfarms



Seagreen Wind Energy Limited has replaced the Floating LiDAR System (FLS) at the location shown


The replacement FLS was deployed on the boundary of the Seagreen Alpha and Seagreen Bravo offshore wind farms in the Firth of Forth Offshore Wind Round 3 Zone off the east coast of Scotland. The replacement FLS is approximately 600m to the south-west of the previous location.

 

The FLS buoy will remain deployed for up to 1 additional year from this date. Service visits will occur at approximately 3-month intervals over this period.

 

The FLS is buoy mounted and is moored using 150 m long DIN 5683-II mooring chain Ø26 x 234 mm and 3 tonne concrete anchor. The buoy is powered by solar panels and micro wind turbine generators. The buoy is yellow (RAL 1023) in colour and will be clearly marked with two navigation lights (flashing amber, 5 flashes every 20 seconds, nominal range 3-6 nm visibility). The buoy is fitted with a Radar reflector. A service vessel will be on station for approximately four hours during service and recovery visits. Other vessels should maintain a safe distance when passing the vessel and should pass at lowest possible speed to avoid vessel wash effects.

 

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Completion of Explosive Ordnance - Hornsea Project Two



Mariners are advised that the Explosive Ordnance Detonation (EOD) phase for the pre-construction stage of Hornsea Project Two is now completed.


Hornsea Project Two confirms the presence of 7 Unexploded Ordnance (cUXO) and 2 suspected UXO (sUXO) which remain undetonated within the Hornsea Project Two Wind Farm area. There are no plans to clear these remaining UXO.

All vessels are requested to maintain the required safe distances as defined from the coordinates

 

It should be noted that ongoing seabed preparation for construction, as well as construction activities themselves, may identify further UXO which may need to be cleared from the site. Separate notices will be issued in this case.

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Export Cable Installation (Beach) - Hornsea Project Two



Ørsted are continuing construction of the Hornsea Project Two Offshore Wind Farm. Preparatory works for export cable installation at the beach landfall and in the nearshore area have commenced.


Cable installation activities will be ongoing an intermittent at the landfall until 30th September 2020 and will re-commence after 1st April 2021.

 

PROPOSED ACTIVITIES:

Landfall Preparation and Cable Installation Please be advised that export cable installation activities will be commencing at the landfall at Horseshoe Point, Lincolnshire from 20th July 2020 through to 30th September 2020. Works will then re-commence on or after 1st April 2021 until 30th September 2021. Works will be continual and intermittent throughout these periods.

 

The works will involve vehicles and construction activities on the beach down to the low water mark and will also include a beached transport barge, nearshore cable laying vessel and other vessels and anchors and other submerged hazards at high water which will be marked, where required. Note that the vessels will have limited manoeuvrability, some vessels will be operating on anchors, and it is requested that all vessels operating or travelling near the vessels maintain a safe distance (at least 500m) and pass all vessels at minimum speed.

 

Vessels:

 

Vessel Activity

Expected Date of

Mobilisation

Port
Dalby Don Support Vessel / Crew Transfer Ongoing Grimsby (UK)
Coastal Challanger - Call Sign:PBOC Anchor handling tug / pre-lay grapnel run / cable remedial work 24/07/2020

Waalhaven (Rotterdam, Netherlands) for anchor handling scope

Grimsby (UK) for pre-lay grapnel run scope
Flintstone Rock Installation Current Scope Complete Stavanger (Norway)
Ndurance - Call Sign: 5BVH3 Export cable Installation 01/08/2020 Halden (Norway)
NKT Victoria Farshore cable installation 01/09/2020 Karlskrona (Norway)
Noordstroom - Call Sign:PIWC Anchor handling tug 01/08/2020 Waalhaven (Rotterdam, Netherlands)
Lingestroom - Call Sign:PICW Anchor handling tug 01/08/2020 TBC – Waalhaven (Rotterdam, Netherlands)
Viking energy - Call Sign:MEPW5 Anchor handling tug 01/08/2020 Waalhaven (Rotterdam, Netherlands)
Maagd - Call Sign:N/A Transport barge 22/07/2020 Waalhaven (Rotterdam, Netherlands) – will be moored at the cable landfall at Horseshoe Point, Lincolnshire
Boka Falcon Cable installation 20/07/2020 Waalhaven (Rotterdam, Netherlands)
Spirit Cable installation 01/06/2021 TBC
Willem Van Oranje Pre-sweeping / dredging 20/07/2020 TBC
Boka Atlantis Mattress installation TBC TBC
Dina Star Mattress Installation / Cable Remedial works 01/08/2020 TBC
Titan Endeavour - Call Sign:2ELT9 Survey Vessel Ongoing Grimsby (UK)
Ivero Survey Vessel Ongoing Hull (UK)
MHO Grimsby Survey Vessel Ongoing  
Voe Vanguard Survey Vessel Current Scope Complete Grimsby (UK)
MTSL Avocet Support Vessel / Crew Transfer 20/07/2020 Grimsby (UK)
Sleipnir Heavy Lift Vessel (substation installation) 15/09/2020 Tyra SE oil and gas to Hornsea Two
Barentsz Transportation of OSS and RCS Jackets and piles 12/08/2020 Batam, Indonesia
AHT TBC Temporary mooring of the Barentsz for lifting operations TBC TBC
Bubble Curtain tug (TBC) Deployment and operation of RCS bubble curtain (if required) TBC TBC
CTV (TBC) Personnel transfer Sleipnir to Barentsz (if required) TBC TBC

 

 

 

 

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Secondary Works on installed assets - Moray East



Planning to carry out secondary works on the installed jackets (within figure 1 bounded area/Site 1) using the Windcat 17


Please be aware that by virtuue of its mode of operation the Windcat 17 will be restricted in her Ability to Manoeuvre(RAM) 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 minumum safe distance from the vessel of 500mwhen undertaking work and showing the appropriate shapes and lights in accordance with COLREGs,(Rule18).

 

Further updates and weekly notice of operations can be accesed in the Moray East Website.

 

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Exposed Subsea Cable - Apollo South



On behalf of Apollo SCS Ltd, fishermen are advised that following a repair to the Apollo South subsea telecoms cable there now exists a section of exposed/unburied cable.


Due to the nature of the seabed in this area the cable may be exposed and could be a hazard to fishing. Fishermen are asked to ensure that they have the route of the Apollo South cable accurately plotted on their fishing charts. Trawler skippers are respectfully asked to exercise caution when trawling in the vicinity of the Apollo South cable and to keep beyond a distance of at least 500 metres from the charted cable route and, where at all possible, to avoid trawling directly over the cable route. Static gear fishermen are advised not to deploy anchors and end weights in close proximity to the cable.

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Subsea Tidal Array - Bluemull Sound (Shetland)



Operation is to conduct work on a subsea tidal energy array in the Bluemull Sound, Shetland using vessel MV C-Odyssey Call Sign: 2ETW7 from August until October 2020.


A multicat vessel the Leask Marine MV C-Odyssey (pictured below, call sign 2ETW7) or a similar vessel will conduct offshore and subsea operations. Works will include loading and preparatory work at Cullivoe Pier and Belmont Pier. The work will be conducted over the months of August, September and October 2020. Operations could take place during the day or at night.

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Clump Weight - Triton Knoll Offshore Windfarm



A 500kg clump weight made from scrapped anchor chains has been dropped


Dimensions of object:

  • Various lengths of anchor chain (max 1.3mtr)
  • Held together by steel sling and shackles
  • Total mass ±500kg
  • Connected is a white polyprop line - ± 25-30mtr in length with sinker at end.
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Moray West Floating LiDAR Buoy



Operational Floating LiDAR Buoy (and mooring system)


Equipment

Location

Floating LiDAR Buoy (including Clump Weight and Mooring Chain)

58°5.381'N  3°0.877'W

 

For further information contact: Guillermo Tornero De Diego (Technical Operations), guillermo.tornero@edpr.com, +44 (0) 7741 625376.  Tony Blackshaw (QHSSE), Tony.Blackshaw@moraywest.com, +44 (0) 7443 638253.  Sarah Edwards (Development & Commercial Fisheries), sarah.edwards@edpr.com, +44 (0) 7741 140150.

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Jacket Installation - Moray Offshore Wind Farm



Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence Jacket installation (subject to receipt of required regulatory approvals) on all of the pre piled areas using the vessel 'Seajacks Scylla' circa 27/06/2020 until further notice.


Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence Jacket installation (subject to receipt of required regulatory approvals) on all of the pre piled areas (shown in figure 1) using Seajacks Scylla circa 27/06/2020 until further notice. Once the Jackets have been installed the vessel 'Boa Sub C' will be utilised for grouting operations on the newly installed jackets as well as the continuation of the soil plug removal.

 

Please be aware that by virtue of its mode of operation the Seajacks Scylla and Boa Sub C will be Restricted in their Ability to Manoeuvre (RAM) 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 distance from the vessel of 500 metres when it is undertaking work and showing the appropriate shapes and lights in accordance with COLREGs Rule 18. Further updates and Weekly notice of operations can be accessed in the Moray East Website

 

http://www.morayoffshore.com/moray-east/the-project/notices-to-mariners/

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Deployment of Buoys - Neart na Gaoithe OWF



Neart na Gaoithe Offshore Wind Limited (NnGOWL) have completed the deployment of four Cardinal buoys around the Neart na Gaoithe Offshore Wind Farm site.


The marker buoys will remain in place until the construction of Neart na Gaoithe Offshore Wind Farm is complete.

 

Name Coordinates
NNG N - North Cardinal - Quick (Q) White light character 56°20.424'N 002°14.616'W
NNG E - East Cardinal - Q (3) 10s White light character 56°14.329'N 002°08.557'W
NNG S - South Cardinal - Q (6) + Long (L) FL 15s White light character 56°12.293'N 002°09.760'W
NNG W - West Cardinal - Q (9) 15s White light character 56°17.057'N 002°21.083'W

 

The buoys will be deployed for the duration of the construction of Neart na Gaoithe Offshore Wind Farm. The buoys will be inspected and maintained at least every 12 months.

 

There are currently two Guard Vessels present on site, which will be on site for the duration of the Neart na Gaoithe Offshore Wind Farm construction period. The guard vessel is either:

  • Artemis, call sign MVIX5;
  • Tranquillity S, call sign MJUH9 or
  • Seagull, call sign MVBO2.
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Wave Rider Buoy - Moray Offshore Windfarm (East)



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) have deployed a directional wave rider buoy within the bounds of Moray East Offshore Windfarm.


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Coils of Steel Rope - Neart Na Gaoithe Offshore Wind Farm



The Glomar Wave has discovered two seabed hazards, within the boundaries of the Neart na Gaoithe Export Cable Corridor. A 50-metre exclusion zone is requested around each of the following locations for safety reasons, until they can safely be removed.


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Cable Repair - GTT Segment C



Following cable repair, cable exposed due rocky seabed conditions


Notice to fisheries and seabed users in the Irish Sea:

 

Please be advised that following a recent cable repair to the GTT (Hibernia) Segment ‘C’ between Southport and Dublin, the cable has been deployed as follows:

 

Initial Splice:        53° 48.3613’N    04° 30.1514’W

Standing bight:   53° 48.2208’N    04° 29.4494’W

Final Splice:         53° 48.1279’N    04° 28.2360’W

 

It should be noted that throughout the extent of the cable repair, despite repeated attempts at post lay burial by an ROV, the predominantly very rocky seabed has meant that cable burial and hence protection has not been possible.

 

It should also be noted that at the position of the ‘standing bight’ the cable is standing upright from the seabed at a height of 0.4 metres, with a length over the ground of 2.0 metres.

 

All seabed users are requested not to deploy equipment which engages with the seabed in this area, to avoid snagging of the cable and particularly so, at the standing bight area.

 

In case of any issues, please do not hesitate to contact the GTT Hibernia emergency contact number on: +353 1 867 3600 Option 2

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Cable Repairs - IFA 2 Interconnector Project



Cable works for the IFA2 project are continuing at KP170.3 of IFA2 RPL (50°39.117'N 000°50.855'W)


Cables Repair works of the HVDC bundle in the vicinity of KP170 are continuing.

 

The Jack up ring Brave Tern will be deploying 2 yellow cable marker buoy approx. 150m apart and from each one a line 15m long with A4 buoys attached. It is expected that one will be placed in the water on 17/18 March 2020 and it is anticipated that they will remain in situ for at least two weeks.

 

Vessels should pass at a safe speed and distance (approximately 500 metres) from all construction and support vessels. During these works the vessels will have restricted maneuverability as they complete their work scope.

 

Deployed Guard Vessels will monitor the exposed areas of cable while works progresses and advise of safe distances locally.

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Exposed Cables - Galloper Offshore Wind Farm



There was evidence of some short sections of cable exposure in 2 areas along the below cable routes in the North Field of the Galloper windfarm.


 

Area Start  Stop
E4H - E5H 51°54.963'N 002°01.325'E 51°54.384'N 002°01.224'E
OSP - F3C 51°57.105'N 002°01.213'E 51°58.309'N 002°03.799'E

 

There is no cable exposure evident in the South Field of the windfarm.

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Exposed Cable Sections - EirGrid East West Interconnector



Following a recent marine survey along the route of the EirGrid East West Interconnector power cable, is was found that the cable is currently exposed at two locations within UK 12-mile territorial waters fishery limit off the North Wales coast.


In the interests of maritime safety, mariners/fishermen are advised not to anchor, trawl or deploy bottom contact fishing equipment in the vicinity of the EirGrid East West Interconnector power cable route and within the boundary box of the exposed cable sections as detailed.

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Deployment of Marker Buoys - Nemo Link Cable



2 x Marker buoys have been deployed along the Nemo Link Cable


Marker buoys have been deployed at 2 locations along the Nemo Link subsea cable route approximately 8.5km and 17.5km East of Ramsgate at the following positions:                                                                                                                                                            

 

51°19.193'N 001°32.578'E                                                                                                                                

51°19.817'N 001°40.282'E                                                                                                                                                                                                            

 

The buoys consist of a hull, day marker, mooring chain and sinker. The outer hulls and day marks are identified by yellow paint.

Fishermen and Mariners are requested to note the buoy locations and to maintain a safe distance during fishing and marine activities.

                  

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Dropped objects on seabed



During recent maintenance work at Turbine position C06 several objects were dropped on the seabed. The biggest being a Bearing Transport Frame (1800mm x 2236mm x 830mm) weight – 947kg as well as 33m of steel Crane Wire and several smaller objects.


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Cable spans



Surveys at Greater Gabbard show that there are 8 free-spans which are listed below.


Location

Span Length (m)

Span Height (cm)

Start of Span

End of Span

L1 cable

6

0

52° 12.284'N 001°39.364'E

52°12.283'N 001°39.369'E

L1 cable

8

13

52° 12.271'N 001°39.434'E

52°12.270'N 001°39.441'E

L1 cable

8

20

52° 12.064'N 001°40.559'E

52°12.061'N 001°40.565'E

L2 cable

15

5

52° 12.128'N 001°40.524'E

52°12.124'N 001°40.535'E

L2 cable

8

76

52° 12.119'N 001°40.560'E

52°12.118'N 001°40.567'E

L3 cable

3

11

52° 12.169'N 001°40.502'E

52°12.169'N 001°40.504'E

L3 cable

13

34

52° 12.148'N 001°40.594'E

52°12.146'N 001°40.604'E

L3 cable

17

10

51° 59.194'N 001°57.431'E

51°59.187'N 001°57.442'E

 

Whilst the results continue to be processed, Balfour Beatty have asked that in the interest of safety and the integrity of the cable, extreme caution be used when Fishing near the export cables and that Fishermen refrain from using towed gear across the export cables wherever possible.

 

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Exposed sections of cable



Surveys at Gunfleet Sands offshore wind farm have illustrated that some array/in-field cables are lying exposed on the seabed and are no longer buried and there is one freespan. These may represent a hazard to fishing.


These are the following cables located in the eastern part of Gunfleet Sands 1 and the north eastern part of Gunfleet Sands 2.

 

Location

Exposure Length (m)

Start of Exposure

End of Exposure

Between turbines C06-D06

4

51°44.447'N 01°15.045'E

51°44.445'N 01°15.046'E

Between turbines F06-F07

23.7

51°44.204'N 01°16.057'E

51°44.209'N 01°16.076'E

Between turbines F07-F08

78.4

51°44.471'N 01°16.744'E

51°44.448'N 01°16.688'E

Between turbines F08-F09

851.7

51°44.485'N 01°16.777'E

51°44.726'N 01°17.398'E

Between turbines G06-G07

21.7

51°44.008'N 01°16.270'E

51°44.002'N 01°16.255'E

Between turbines G07-G08

21.9

51°44.273'N 01°16.948'E

51°44.267'N 01°16.932'E

Between turbines G08-G09

20.7

51°44.276'N 01°16.953'E

51°44.280'N 01°16.969'E

Between turbines G08-G09

16.6

51°44.522'N 01°17.591'E

51°44.527'N 01°17.603'E

 

There is a freespan at the following array Cable Position:

 

Location

Exposure Length (m)

Start of Exposure

End of Exposure

Between turbines C06-D06

4

51°44.447'N 01°15.045'E

51°44.445'N 01°15.046'E

 

 

 

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Exposed cable and lost fishing gear



Exposed section of cable and lost fishing gear.


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Exposed cable and lost fishing gear



Exposed section of cable and lost fishing gear.


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Exposed Cable Section (SHEFA)



There is an exposed section on the SHEFA cable coming out of Orkney between the two positions below.


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