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Cable Installation - Havhingsten (North Sea)



Subject to granting of all necessary licences and permits (expected March 2020), installation of the Havhingsten fibre optic telecommunication cable system is planned to commence, at the earliest, from April 2020 onwards.


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.

 

Planned durations of works are as per below:

  • Seaton Sluice: Nearshore to 12nm Territorial Waters boundary: 3-4 days (including 1 day for shore end landing)
  • Seaton Sluice: 12nm Territorial Waters boundary to EEZ boundary (median line): 22 days (including 4 x pipeline crossings)

Expected speed of installation will be 17 km per day.

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.

 

Planned durations of works are as per below:

  • Seaton Sluice: Nearshore to 12nm Territorial Waters boundary: 3-4 days (including 1 day for shore end landing)
  • Seaton Sluice: 12nm Territorial Waters boundary to EEZ boundary (median line): 22 days (including 4 x pipeline crossings)

Expected speed of installation will be 17 km per day.

 

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

 

FFPV Nordnes (Rock Placement Vessel)                                                                                                             

DP Type

Length Overall:                                167 m

Breadth:                                            26 m

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Cable Installation - Havhingsten (Irish Sea)



Subject to granting of all necessary licences and permits (expected March 2020), installation of the Havhingsten fibre optic telecommunication cable system is planned to commence, at the earliest, from April 2020 onwards.


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. With the planned installation taking approx. 19 days.

 

There will be also be associated rock placement operations post cable installation at one (1) location within UK waters. The exact location of this rock placement work will be issued in future notices once confirmed. 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

 

FFPV Nordnes (Rock Placement Vessel)                                                                                                             

DP Type

Length Overall:                                167 m

Breadth:                                            26 m

 

 

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.

 

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

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Survey - Sofia Wind Farm



Fugro are due to commence Offshore Geophysical Investigations along the export cable corridor of the Sofia Offshore Wind Farm (SOWF) From 9th February for 2 to 3 Weeks


The following vessels will be operational on site during these works

 

 

Type of Vessel

Vessel Name

Call Sign

MMSI Number

Survey Vessel

Fugro Pioneer

C6BH3

311000262

Guard Vessel

Margaret Mary

MGNM6

232025575

 

 

The survey vessel requests a minimum of a 2000m safety zone during survey operations and all vessels operational in the vicinity should pass at a decreased speed to reduce vessel wash. Survey operations will be conducted on a 24 hour basis, both vessels can be contacted on VHF channel 16 throughout the works for any further information.

 

An Offshore Fisheries Liaison Representative will be on board the Fugro Pioneer throughout the duration of the works.

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Power Cable Replacement - Carsaig to Jura (Lealt Bay)



Briggs Marine Contractors (on behalf of SHEPD) will be undertaking a cable installation within a 1km wide corridor between Mainland (Carsaig) and shoreline of Jura.


The work will utilise the DP2 cable laying vessel ‘M/V Elektron’ Call Sign: LADO, Dive Vessel ‘Forth Warrior’ Call Sign: 2JHR8 and support craft vessels ‘Celtic Trader, Celtic Voyager, Celtic Nomad and Celtic Guardian’.

 

The Forth Trojan will operate as a guard vessel during cable lay operations

 

The installation work aims to be concentrated within the existing cable route corridor, defined by the following coordinates. Due to weather, these operations have been delayed and will commence during an appropriate weather window following 10/02/2020 and will continue over a planned period of 7 days, weather permitting.

 

The installation work aims to be concentrated within the existing cable route corridor, defined by the following coordinates. However, some work will take place within the central channel.

 

 

Work Description

Cable installation will be completed by Elektron, during which time it will be assisted by Forth Warrior and support craft Celtic Trader, Celtic Voyager, Celtic Nomad and Celtic Guardian. Cable lay operations will be conducted on a 24 hour basis.

 

Other vessels should maintain an appropriate and safe distance of 500 m when passing the 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.

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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/


Vessels will be operating as follows:

 

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

Sorrento

Guard Vessel

SXLE

235087639

N/A

Grimsby

28/12/19

Precision 1

Guard Vessel

2FCD2

235089165

N/A

Hull

28/12/19

Seacat Intrepid

Crew Transfer

2HWU6

235107284

N/A

Grimsby

01/01/20

Seaway Strashnov

Heavy Lift Vessel

5BNL2

212905000

9452701

Rotterdam

01/01/20

Manta

AHTS

ORKJ

205340000

9261487

Rotterdam

01/01/20

Seraya

AHTS

9HA4875

248942000

9662368

Rotterdam

01/01/20

Bravenes

Scour Protection

PDCF

244860916

9756200

Rotterdam

06/02/20

Falcon

Boulder Clearance

HP9176

370782000

9448401

Rotterdam

05/02/20

 

All Vessels Can be Contacted Via VHF 16 When Infield

  • Guard Vessel – Sorrento Operating from Port of Grimsby
  • Relief Guard Vessel - Precision 1 Operating from Port of Hull
  • Crew Transfer Vessel – Seacat Intrepid Operating from Port of Grimsby
  • Heavy Lift Vessel – Seaway Strashnov - Installation of 92 Monopiles and Transition Pieces and also 2 Offshore Sub Station Platforms - 8 Point Mooring System Utilised.
  • There are currently 2 locations infield whereby foundations have been installed, these are at locations “TK-V11” & “TK-V12”
  • AHTS – Seraya - Supporting Seaway Strashnov by installing the 8 point mooring system.
  • AHTS – Manta - Supporting Seaway Strashnov by installing the 8 point mooring system. Manta is also installing Noise Monitoring Equipment on the seabed at various locations around the Triton Knoll Wind Farm
  • Scour Protection Vessel – Bravenes shall be operating at 4 locations within the Triton Knoll Wind Farm Area and will be on location for approx 10 days.
  • AHTS – Falcon - Boulder Clearance Works Within The Triton Knoll Wind Farm Area and will be on location for approx 30 days.

All vessels shall be following standard shipping routes to / from Triton Knoll and River Humber & Rotterdam respectively.

 

Note: There are numerous infield hazards within the Triton Knoll Wind Farm which are associated with Offshore Construction (foundation installation, noise monitoring equipment, 8 point mooring systems etc.) These are changing on a daily basis. It is strongly advised that the adherence of the demarcation buoys if followed.

 

For the latest information on these infield hazards, the Guard Vessel Sorrento needs to be contacted. To be clear to avoid all infield hazards, mariners are advised to respect the demarcation buoys that is in place around the perimeter of the construction area that is Triton Knoll Offshore Wind Farm.

 

Information can be found at Admiralty Notice to Mariners 6175(P)/2019 – England – East Coast Works. Windfarm.Buoyage.Restricted Area.

 

Guard Vessel Sorrento also broadcasts information messages regularly as required with initial notification on VHF 16 and then moving to a working channel.

 

Buoys

Partrac Ltd. deployed an additional x3 Demarcation Buoys and x1 Metocean Buoy (Figure 1) at the Triton Knoll Offshore Wind Farm (TKOWF) on 24th November 2019 using the vessel THV Galatea operated by Trinity House.

 

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)

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)

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)

 

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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 yearâ€Âround and 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, the MV Apollo and the MV Normand Service will 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

GeoSea

MV Apollo

LXBP

58°13.261'N 02°34.267'W

58°08.003'N 02°34.182'W

58°03.878'N 02°54.747'W

58°12.529'N 02°52.563'W

58°19.425'N 02°44.191'W

1 May 2019 for approximately 11 months

GeoSea

MV Normand Service

LAFR8

As above

As above

As above

Kinnaird Marine

GV Replenish

MASY7

As above

As above

As above

Kinnaird Marine

GV Resolute

MLPD5

As above

As above

As above

Kinnaird Marine

GV Ability

MDFW3

As above

As above

As above

 

Buoys

Moray East has completed the deployment of nine construction marker buoys around the Moray East site.  The marker buoys will remain in place until after construction of the Moray East Offshore Wind Farm is complete.

 

'Buoy 4 – East Cardinal Mark, AIS not Transmitting, repair of AIS signal is scheduled for early March'

 

Buoy

Position

Buoy 1 - North Cardinal Buoy, Pillar shaped with a north cardinal shaped top mark, exhibiting a Quick (Q) White (W) light character and AIS.

 

58°18.110'N 002°41.080'W

Buoy 2 - Special Mark Buoy, Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character.

 

58°16.805'N 002°37.923'W

Buoy 3 - Special Mark Buoy, Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character.

 

58°15.141'N 002°35.955'W

Buoy 4 - East Cardinal Buoy, Pillar shaped with an east cardinal shaped top mark, exhibiting a Very (V) Q (3) 5 second (s) W light character and AIS.  'AIS NOT TRANSMITTING' Repair of AIS signal is scheduled for early March

 

58°10.735'N 002°32.764'W

Buoy 5 - Special Mark Buoy, Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character.

 

58°07.828'N 002°35.344'W

Buoy 6 - Special Mark Buoy, Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character.

 

58°06.733'N 002°38.331'W

Buoy 7 - Special Mark Buoy, Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character.

 

58°04.954'N 002°47.156'W

Buoy 8 – South Cardinal, Pillar shaped with a south cardinal shaped top mark, exhibiting a V Q (6) + L Fl 10s W light character and AIS.

 

58°04.019'N 002°52.111'W

Buoy 9 - Special Mark Buoy, Pillar shaped with a yellow ‘x’ shaped top mark, exhibiting a Fl Y 5s light character.

 

58°08.618'N 002°50.618'W

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Construction of Wind Farm (Seagreen 2 & 3)



Activities are continuing related to the development of the Seagreen 2 & 3 wind farms. For background information visit: https://sse.com/whatwedo/ourprojectsandassets/renewables/seagreen2and3/


Deployment of Buoys

SSE Renewables have been deploying 3 Met Ocean Buoys with associated Guard Buoys for the measurement of waves at the locations highlighted.

 

Survey

SSE Renewables will be returning to Seagreen 2&3 wind farm to undertake the remaining works on the Geophysical survey not captured during the initial survey phase in August to September 2019. The survey will be within the proposed Seagreen 2 and 3 wind farm site boundaries.

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Survey - Blyth Offshore Demonstrator



Natural Power will be conducting otter trawl & potting surveys at the Blyth Offshore Demonstrator wind farm.


Natural Power will be conducting otter trawl & potting surveys at the Blyth Offshore Demonstrator wind farm. The surveys are proposed to commence on 28th January 2020 and will be completed 4 days after commencement (otter trawl survey duration 1 day / potting survey duration 3 days).

 

Company,

Vessel &

Call Sign

Survey Area

 

Survey Area

Start Timeframe & Duration

Natural Power

Princess Royal

2EYM2

 

55°16.070'N 001°34.070'W

55°11.650'N 001°14.220'W

55°02.970'N 001°20.130'W

55°02.510'N 001°28.930'W

55°16.070'N 001°34.070'W

 

Start 28th January 2020

For 4 Days

 

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Construction of Wind Farm (Neart na Gaothie)



Activities are continuing related to the development of the Neart na Gaothie wind farm. For background information visit: https://nngoffshorewind.com/about/


Installtion of Beacon

A calibration beacon (USBL transponder 2310) has been installed within the boundary of the wind farm site. The beacon was installed on 30 December 2019 and will remain in position until in up to June 2020.

 

The beacon is located on the seabed, is approximately 1 metre in height and is not marked with a buoy.

 

Positon: 56°16.310’ N  002°17.701’ W 

 

Boulder Clearance

Pre-construction boulder clearance activities are underway in the area of the wind farm and export cable corridor.

 

The works commenced on 27 December 2019 using a single dynamically positioned survey vessel, MV FS Kristiansand, working 24/7. The works have begun in the Offshore Wind Farm Area and will be followed by the Export Cable Corridor. A guard vessel is present offshore at all times.  

Survey Vessel

MV FS Kristiansand (Call sign: MAAS7)

Guard vessel:  Artemis MVIX5 or Seagull MVBO  

Survey

A survey vessel is due to commence a geotechnical survey, comprised of cone penetration tests and boreholes within the boundaries of the Neart na Gaoithe Offshore Wind Farm Site.

 

The duration of this survey is approximately 40 days, depending on weather, and is due to begin no earlier than 20th December. During the survey, the vessel will hold on station and display the relevant RAM markings during periods of restricted manoeuvrability. Up to two vessels will be present on site at any one time.  A guard vessel will be present offshore at all times; please see below for Fisheries Liaison Officer contact details.  

UXOs

During a UXO inspection survey within the boundaries of the Neart na Gaoithe Offshore Wind Farm Site and Cable Route, a number of confirmed UXO (cUXO) targets have been identified so far. The cUXO target locations identified between 12 December 2019 and 7 January 2020 are provided in the table below.

 

A 50m exclusion zone is requested at each of these locations.

 

Latitude

Longitude

Description

56°13.210’N

56°13.716’N

56°14.345’N

56°14.377’N

56°14.487’N

56°14.063’N

56°14.038’N

56°14.011’N

56°14.123’N

56°14.108’N

56°14.113’N

56°14.133’N

56°14.177’N

56°14.628’N

56°14.600’N

56°14.847’N

56°14.907’N

56°14.934’N

56°14.749’N

56°14.509’N

56°15.415’N

56°16.854’N

02°16.736’W

02°15.756’W

02°11.118’W

02°11.573’W

02°11.764’W

02°14.938’W

02°15.140’W

02°17.724’W

02°17.818’W

02°17.812’W

02°17.828’W

02°17.897’W

02°17.917W

02°17.608’W

02°17.580’W

02°17.404’W

02°17.386’W

02°17.365’W

02°17.078’W

02°14.851’W

02°19.367’W

02°15.654’W

15” Naval Shell

8” Projectile

6” Projectile

4” Projectile

15" Projectile (possibly HE)

15" Projectile

20mm Anti-Aircraft Ammunition (AAA)

4" Projectile HE

15" Naval Shell (projectile)

15" Projectile

15" Projectile

15" Projectile

15" Projectile

20mm Anti-Aircraft Ammunition (AAA)

15" Projectile

Explosive Remnant of War (ERW)

15" Projectile

15" Projectile

15" Projectile

2.5" Rocket

15" Projectile

15" Projectile

 

 

 

 

 

 

 

 

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Floating LiDAR Buoy - Moray OWF (West) Ltd



Mariners are advised that a Floating LiDAR Buoy, primarily measuring wind and metocean data, is deployed at a location in the centre of the Moray West Offshore Wind Farm Site.


The Floating LiDAR Buoy was deployed on 2nd December 2018 and is to remain in place until December 2020.

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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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Unexploded Ordnance



Hornsea Project Two has completed unexploded ordnance (UXO) investigations for the proposed Hornsea Project Two Offshore Wind Farm located within the UK Sector of the North Sea for 2019, off the coast of East Yorkshire.


Mariners are advised that Hornsea Project Two confirms the presence of 13 confirmed unexploded ordnance (UXO) as yet undetonated within the export cable corridor.

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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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Cable Repairs - IFA 2 Interconnector Project



Mariners are advised about cable works for the IFA2 project commencing at KP170.3 of IFA2 RPL.


Cables Repair works of the HVDC bundle in the vicinity of KP170 are planned to take place between: 21th January – 17th February 2020

 

50°39.117'N 000°50.855'W

 

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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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 Export Cable (Beatrice Wind Farm)



During a routine inspection of the export cable EC2, a short section of the cable was found to be partially exposed on the Seabed. This may constitute a hazard to activities such as fishing and anchoring.


A short area (4metres) of partial exposure of Export Cable EC2 is in the vicinity of the mid cable joint at the location where the cable changes direction through 180 degrees.

 

The maximum exposure observed was approx. 50% with no damage or defects observed. The seabed at location was observed to be flat and featureless and mainly consisted of sand and silt. It is requested that mariners avoid activities which are likely to disturb the seabed within a 500m Radius of this location until the exposed cable has been re-buried. A further Notice to Mariners will be issued to confirm the re-burial and safe operation in this area.

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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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