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Scylla Project - Mattress Lay at Tulip Oil Crossing



Please be advised that concrete mattress lay works have been completed at the Tulip Oil subsea asset crossing. Please be aware that the mattresses are now in place.


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Survey - Yellow North & South Offshore Wind Farm - Short Delay To Start



A geophysical, geotechnical and environmental (benthic) survey of the proposed Yellow North and South Offshore Wind Farm Project can now be expected to start 1st July Using vessel Ocean Resolution call sign : 3EIPG.


The survey involves the use of 2DUHR (sparker) equipment, Sub-bottom Profiler (SBP), Sidescan Sonar (SSS) and Magnetometer equipment, some of which will be towed approximately 150 m astern of the vessel, during July and August. Drop-down camera and grab samples will be collected at approximately 90 locations during this period and into August/September and Cone Penetration Tests (CPTs) will be undertaken at up to approximately 40 locations during September.

 

The survey will cover the main offshore array areas, plus 3km buffer, with initial 2km line spacing (later infilled to potentially 250m spacing at some locations). The survey vessels will start in the northern polygon initially to acquire a coarse grid of data across the site, before returning to infill where required. Sparker tests will be run to begin with in discrete areas.

 

All vessels are requested to maintain a safe distance (1nm) from the survey vessel Ocean Resolution at all times. Vessels will display appropriate shapes and lights when surveying.

 

Outline Programme of works

Activity Start Date End Date
Geophysical Survey (inclusive of towed gear) 01/07/21 31/08/21
Dtop-down camera and grab sampling 12/07/21 30/09/21
Cone Penetration Tests (CPTs) 01/09/21 30/09/21

 

 

An Offshore Fisheries Liaison Officer (OFLO) will be present aboard the survey vessel – see details below. Any at sea, operational issues should be directed towards the OFLO in the first instance.

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Installation of export cables - Neart Na Gaoithe (NnG) Export Cable Corridor.



Pre-lay grapnel run (PLGR) and installation of two export cables within the Neart Na Gaoithe (NnG) Export Cable Corridor is due to commence. The PLGR is due to begin week commencing 14th June 2021 with export cable installation commencing thereafter.


Mariners are advised that Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) is due to commence a pre-lay grapnel run (PLGR) and installation of the two export cables within the Neart Na Gaoithe (NnG) Export Cable Corridor. The PLGR is due to begin week commencing 14th  June 2021, at the earliest, with the installation of the first export cable commencing thereafter. The PLGR will be completed by the vessel Norne (call sign: PCJR), whilst the two export cables will be installed by the cable lay vessel (CLV) Cable Enterprise (call sign: 2FOV9).

 

The PLGR will be completed using a grapnel towed from the vessel. The grapnel will be deployed to retrieve any potential abandoned fishing gear or ships crane wires that may be present along the Export Cable Routes. Any debris recovered to deck will be retained on board the vessel for disposal onshore.

 

  For installation of each cable, laying will commence at the landfall, with the Cable Enterprise positioned as close to the horizontal directional drill (HDD) exit pit as possible, given the draught of the vessel. Once the CLV has laid the first approx. 750m of cable, a pull-in winch located onshore will draw this section through the HDD ducts. Once complete, the CLV will begin to lay the cable along the export cable route in the direction of the Wind Farm Area.  A number of small rigid-hull inflatable boats (RHIB) and guard vessels will be patrolling the cable corridor, with a Crew Transfer Vessel Celtic Guardian, (call sign: 21ZH5) also supporting.

 

The cable will be buried into the seabed by remotely operated vehicles launched by the Normand Pacific (call sign: LAXI7). The burial campaign for the first export cable is expected to commence in late-June; a subsequent Notice to Mariners will be issued prior to this work commencing, with further information.

 

Area of Operations

Mariners are advised that both the Norne and Cable Enterprise will be mobilised from Middlesbrough to work within the boundaries of the NnG Export Cable Corridor, within the coordinates shown. 

 

Please be aware that by virtue of its mode of operation and the equipment deployed, both the Norne and Cable Enterprise will at times 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 both vessels of 500 metres when they are undertaking their work and showing the appropriate shapes and lights. An exclusion area of 500m either side of each export cable route for static fishing gear is requested. The existing nearshore exclusion area will also remain in place.

 

Vessels with bottom-towed gear are requested to be kept clear of a reduced exclusion area once the cable laying commences, which will be notified by the Company Fisheries Liaison Officer. 

 

Schedule  The PLGR and cable installation works is due to begin on the first export cable week commencing 14th June 2021,weather dependent. The same works on the second export cable is due to begin in mid-July 2021. It is anticipated that the PLGR and cable installation works on both cables will be completed in August, weather dependant.

Construction works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week), unless notified otherwise.  

For updates on the progress of the works, information will be provided in the Weekly Notice of Operations available on the NnG project website: https://nngoffshorewind.com/downloads/. 

 

Vessels Associated with the Activity

 

Vessel name: 

Norne 

Vessel role: 

Pre-Lay Grapnel Run Vessel 

Call sign: 

PCJR 

Maritime Mobile Service Identity: 

245460000 

On board contact: 

Contact name: Vessel Master  Email: norne@koerts-its.eu    Phone: +44 203 1309591 

Onshore representative: 

Contact name: R. Koerts

Email: dpa@koerts.eu    Phone: +31 (6) 12343464  

 

A spearpoint grapnel will be used by the Norne, which will consist of a shank with five prongs with reinforced tips. The  grapnel will be 1.5m in length and 0.9m wide, with a total weight of 250kg. The spearpoint grapnel  will be connected to the Norne by a towing wire, and both gifford and rennie chain grapnels. 

 

Vessel name: 

Cable Enterprise 

Vessel role:

Cable Installation Vessel

Call sign: 

2FOV9 

Maritime Mobile Service Identity: 

235093018 

On board contact: 

Contact name: Vessel Master  Email: ce.master@prysmiangroup.com  Phone: +44 779 8764403

Onshore representative: 

Contact name: Stefano Dalmasso  Email: sdalmasso@seaworldmanagement.com  Phone: +377 678 632642 

 

Vessel name: 

Celtic Guardian 

Vessel role:

Crew Transfer Vessel 

Call sign:

21ZH5 

Maritime Mobile Service Identity: 

235114006 

On board contact:

Contact name: Vessel Master – Iain Hill  Email: iain.hill@specialisedmarinesupport.com  Phone: 07540 944992 

Onshore representative:

Contact name: Steven Foster  Phone: +44 (0) 7425 623377

 

Vessel name: 

Morning Dawn 

Vessel role: 

Guard Vessel 

Call sign: 

MHEU3 

On board contact: 

Contact name: Vessel Master  Email: bridge@morning-dawn.co.uk  Phone: + 33 640 047722 /  +44 1779 400158  

 

Vessel name: 

Courage

Vessel role:

Guard Vessel 

Call sign: 

MJDL4 

On board contact: 

Contact name: Vessel Master  Email: couragesh170@gmail.com   Phone: +44 1261 877295 / +44 7766 833463  

 

Vessel name: 

Shemarah II 

Vessel role: 

Guard Vessel 

Call sign: 

MVRR7 

On board contact: 

Contact name: Vessel Master  Email: donaldmoodie@moodiemarine.com    Phone: +44 131 202 9850  / +44 7774 810625  

 

Vessel name:

Seagull 

Vessel role: 

Guard Vessel 

Call sign: 

MVBO2

On board contact: 

Contact name: Vessel Master  Email: seagullbf74@gmail.com  Phone: +44 (0) 1261 878040 / +44 (0) 7895 919100

 

Vessel name: 

 Artemis 

Vessel role: 

Guard Vessel 

Call sign: 

MVIX5 

On board contact: 

Contact name: Vessel Master  Email: concordebf47@aol.com  Phone: +44 (0) 7949 663790 / +44 (0) 1261 455461 

 

Vessel name: 

Tranquillity S

Vessel role: 

Guard Vessel 

Call sign: 

MJUH9 

On board contact: 

Contact name: Vessel Master  Email: spousekeil@yahoo.com    Phone: +44 (0) 1346 454758 

 

Port of Operation The Norne and Cable Enterprise will both mobilise from Middlesbrough, UK. 

 

Adverse weather conditions  Upon adverse weather conditions, if the Norne and Cable Enterprise are not able to hold on position, they will seek shelter or return to Port within the Firth of Forth. 

 

General Safety Advice  Construction activities are ongoing within the boundaries of the Neart na Gaoithe Offshore Wind Farm.  Mariners are advised to refer to the NnG Weekly Notice of Operations where up to date information regarding activities on site is broadcast. A copy of this notice and the Weekly Notice of Operations can also be found at https://nngoffshorewind.com/downloads/ 

 

Marine Coordination Contact Details  The following contact can provide more information if required. Please note that specific queries can also be addressed to the relevant vessel or shore based representative.

Telephone number  (daytime): 

+44 (0) 1890 751415 (use Emergency contact only until further notice)  

Emergency contact (24/7):

+44 (0) 7508 421406 

Email: 

nng.mc@smchse.com 

Address: 

NnG Offshore Wind Farm Marine Coordination Centre, Gunsgreen Basin, Eyemouth,  TD14 5SD 

 

Fisheries Liaison  Fisheries liaison associated with the activity will be co-ordinated by Natural Power. For any commercial fishery queries please contact the NnG company Fisheries Liaison Officer (CFLO) Peter Berney, telephone: +44 (0)7391 402387 or email: NnG.FLO@naturalpower.com. An Offshore Fisheries Liaison Officer (OFLO) will be present on both the Norne and Cable Enterprise and can be contacted via VHF Channel 16. 

 

Distribution List  A central list of recipients is maintained by the company Fisheries Liaison Officer; if you are not the appropriate recipient of these notices, or do not wish to receive the notices in the future, please contact us at NnG.FLO@naturalpower.com. A copy of this notice can also be found at https://nngoffshorewind.com/  

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Eastern Irish Sea Wind Farms - Monthly Notice To Mariners - Update



General Maintenance and Survey for Barrow, Burbo Bank, Burbo Bank Extension, Walney 1, 2, 3 & 4, West of Duddon Sands.


General Maintenence

Site Lighting and Marking Status Survey Jack-Up Vessel Other Works
Barrow (BOW) All currently operational N/A N/A

TP Maintenance

(500m safety distance requested)

Burbo Bank (BBW 01) All currently operational N/A N/A N/A
Burbo Extension (BBW 02) All currently operational N/A N/A

Diving Operations

(Licensable Activities)

Walney 01 and 02 (WOW 01&02) All currently operational N/A N/A

TP Maintenance

(500m safety distance requested)

Walney Extension (WOW 03 & WOW 04) (WOW Ext)

All currently operational N/A N/A

Diving Operations

(Licensable Activities)

West of Duddon Sands All currently operational N/A N/A

Diving Operations

(Licensable Activities)

 

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Survey - Ormonde Offshore Wind Farm



The Survey of the Seabed Cable System and all of the Turbine Jacket Foundations can be expected to start shortly for approx. 2 months. The 18.5 meter survey vessel 'Cwind Alliance' is currently in Barrow to mobilise and can be expected on-site shortly.


The project is not expected to interfere with an other vessel but as it will involve a team of surveyors operating highly sensitive Survey Equipment including Multi Bean Echo Sounders, Sonar as well as Bottom Profiling Equipment a wide berth, minimum 500 meters, is requested to reduce speed if psossible.

 

The survey can be expected to last for approx. 2 months.

 

Fishermen are requested and advised not to set any gear close to any of the Turbine positions in the lead up to and during this period of survey work.

See detailed map on our bulletin website
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Benthic Survey - Dogger Bank A & B



Dogger Bank Project will be carrying out an ecological survey of the Dogger Bank A & B inter array cable areas.


The work will be carried out by the dive support vessel DSV Curtis Marshall using a benthic grab sampler from the stern of the vessel. The operation will be 24hrs a day.

 

During the operations the vessel will be restricted in its ability to manoeuvre and will display the appropriate day shapes and lights. Passing vessels are requested to maintain a minimum 500m safety distance from DSV Curtis Marshal during operations, reducing speed to minimise wake disturbance.

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Grace Hopper Subsea Fibre Optic Cable System - Cable Installation Activities



SubCom vessel, CS Responder call sign:V7CY9 will be carrying out cable installation operations along the route of the Grace Hopper Subsea Fibre Optic Cable System in the UK TS & EEZ.From 29th May - 30th June 2021 and then from July 26th until August 15th


The operations are expected to be carried out in two periods, the first one from 29 May to 14th July 2021 and the second from July 26th until August 15th

However, please note the start date and the duration of the activity is weather dependant.

 

CS Responder will have stern deployed equipment and cable, and will be restricted in manoeuvrability. All vessels operating within this area are requested to keep their distance, maintaining at least the 500m safety zone around the vessel, and pass at minimum speed to reduce vessel wash.

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

See detailed map on our bulletin website
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Survey - Dogger Bank B



The survey vessel, Fugro Frontier, will conduct a geophysical survey at the Dogger Bank B wind farm (DBB) array site in the Southern North Sea, between 23rd June 2021 and approximately 30th August 2021.


Survey operations will be continuous, 24 hours a day, the vessel towing subsea sensors up to approximately 300m behind the vessel.The Fugro Frontier will be surveying prescribed survey lines, which will require large turning circles. It is therefore requested that all vessels maintain a minimum 3000m separation distance from the survey vessel and pass at reduced speed. During operations the vessel will be restricted in its ability to manoeuvre and will display the appropriate day shapes and lights.

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Construction of Wind Farm (Triton Knoll)



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


Mariners are advised that the following vessels continue to be active at the Triton Knoll Offshore Wind Farm as outlined within previously issued NtM's

 

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

Vessel Name

Type

Call Sign

MMSI

IMO

Operating Port

Commence Date

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

Windcat 11 Crew Transfer Vessel 2BIS9 235066459 N/A Grimsby 14/12/2020
Pacific (Wind) Osprey Wind Turbine Installation Vessel 5BUF3 210286000 9621704 Able Seaton 10/01/2021
Acta Orion Service Operations Vessel PCEN 244830883 9750268 Immingham 15/01/2021
HST Euan Crew Transfer Vessel MGQO3 232025959 9883974 Grimsby 15/01/2021
World Mistral Crew Transfer Vessel OWJT2 219018009 9681302 Grimsby 15/03/2021
Normand Fortress Service Operations Vessel LIKW3 258537000 9371218 Grimsby 15/03/2021
Afon Las Buoyage Maintenance Vessel 2JEM8 235115261 9547398 Hull 19/04/2021
Afon Cefni Buoyage Maintenance Vessel 2FYX2 235095403 9258181 Hull 19/04/2021
Margaret Mary Guard Vessel MGNM6 232025575 N/A Grimsby 12/04/2021
Seacat Enterprise Crew Transfer Vessel MAPS9 232006483 N/A Grimsby 25/04/2021

 

Construction activities carried out over the previous 7 Days:

  • Ongoing activities at Offshore Sub Station Platforms East & West continues.
  • Ongoing activities at Offshore foundations continues.
  • Wind Turbine Generator Installation & Commissioning and Service continues infield (54 WTG's currently installed - 21st June 2021).

Construction Activities planned for the next 7 days:

  • Ongoing activities at Offshore Sub Station Platforms East & West continues.
  • Ongoing activities at Offshore foundations continues.
  • Wind Turbine Generator Installation & Commissioning and Service continues infield.
  • Expected arrival of Operations & Maintenance Crew Transfer Vessel – Windcat 11.

*** 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)

 

Mariners are advised that all foundations monopiles have been installed and all inter-array and export cables have been installed, buried and need to be assumed as energised / live at all times.

 

Local Notice to Mariners Recently

NtM 001-2021 (05th January 2021)

NtM 002-2021 (20th January 2021)

NtM 003-2021 (17th March 2021)

NtM 004-2021 (24th March 2021)

NtM 005-2021 (06th April 2021)

NtM 006-2021 (16th April 2021)

NtM 007-2021 (18th May 2021)

 

Navigation Warning - 08th January 2021

 

Mariners are advised that the remnants of a Wave Rider Buoy sinker weight and partial rigging are located within the Triton Knoll Offshore Wind Farm Construction site at the following location;

 

53° 30.442N 000° 50.564E

 

It is advised that the partial rigging could potentially be floating up to 9.7m above the seabed, reducing the navigable safe water in the immediate area to 10m LAT.  Mariners are advised to avoid the indicated position by 250 metres.

 

Possible Dangers to Navigation - Properties of the polypropylene show that the rope is buoyant, this makes the line sensitive for thruster currents. Taking the site water depth into consideration (19.7m LAT) and the maximum expected height above seabed of the rope 9.7m the line is expected to be floating submerged at approximately -10m LAT. In addition, it is noted that over time sediments will be trapped between the fibres and the heavier rope may finally sink. The polypropylene rope may impose a risk to foul propellers / propulsion of vessels due to the buoyant nature of the rope. As the rope is submerged at a depth of ~-10m LAT the risk is considered minimum for vessels with a shallow draught (<5m) and medium for a vessel with a deeper draught (>5m). Over time sediments will be trapped between the fibres and the heavier rope may finally sink thereby reducing the risk to propellers/propulsion of vessels. The clump weight itself (chain) is expected to have sunk into the seabed and has no significant height above seabed. In addition, the edges of the clump weight are mostly rounded (chain), the risk the clump weigh imposes to fishing activities/gear is therefore considered to be minimal.

 

Navigation Warning - 16th March 2021

 

Mariners are advised that two UXO targets have been confirmed within the Triton Knoll Offshore Wind Farm Array.

 

Mariners are advised that the two confirmed targets are located within 20 metres water depth (LAT) and a 10 metre radius exclusion zone is required around each target.  The following table provides the coordinates and a description for each target.

 

Description of Target Latitude Longitude

Water Depth

(LAT) Metres

Required Exclusion

Zone (Metres Radius)

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

 

Navigation Warning - 25th May 2021

 

 

Mariners are advised that during a Man Overboard Recovery drill a “Dead Fred Casualty” was subsequently lost, presumed sunk to the seabed in the following position;

 

Latitude - 53° 30.27’N

Longitude - 000°40.55’E

 

Water Depth – 79m LAT

 

If the object is recovered, please contact the following in the following order.

  • Triton Knoll Marine Coordination Centre:
  • Email – tkmcc@smchse.com
  • Tel – 0045 82 13 62 19
  • Lee Cornwell - External Consultant – Marine Operations
  • Email - l.cornwell@tritonknoll.co.uk
  • M: +44 (0)7384 807293
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Survey - BT R100(Orkney, Shetland & Inner Hebrides)



Fugro on behalf of BT will be undertaking a geophysical and geotechnical survey of the proposed R100 telecommunications cable routes using 3 vessels (Fugro Venturer, Valkyrie and FTV Xplorer) for operations from early June 2021 to end of August 2021.


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NOUK Telecommunications cable in UK TW and EEZ - Proposed Cable



Global Marine will be conducting the installation of the proposed NOUK Telecommunications cable in UK TW and EEZ.


Please be advised that Global Marine will be conducting the installation of the proposed NOUK Telecommunications cable in UK TW and EEZ. Please note that there will be numerous vessels associated with the project. These are summarised below:

 

  • Pre installation rock placement (UK EEZ) 30th June – 2nd July 2021

The Nordes vessel will be conducting pre installation rock placement at 2 pipeline crossings. These are located at (55 19.2785’N 0 18.1219’W) & (55 57.2785’N 1  38.5306’E).  

 

  • Pre-Lay Grapnel Run (PLGR) route clearance (UK EEZ – TW)  20th June – 3rd July 2021

The AHTS Sima vessel call sign: OUXR2 will be conducting PLGR route clearance along the NO UK route within UK waters.

 

  • Cable installation (UK TW - EEZ)  20th July – 30th August 2021

The Normand Clipper will be installing the proposed NOUK cable from the landing point at Seaton Sluice and laying the cable towards Norway.

 

  • Post Lay Inspection Burial (PLIB) (UK TW - EEZ) 17th August – 2nd September 2021

The Symphony call sign: C6YY3 will be conducting PLIB activity along the proposed cable route.

 

  • Post installation rock placement vessel (UK EEZ) 1st – 9th September 2021

The Nordes vessel will then be conducting post installation rock placement at the 2 pipeline crossings described in Section 1 above.

 

Note that the timings are subject to change however an update due in early June.

 

The vessels will be limited in manoeuvrability. Other vessels should maintain a distance of at least 1NM from the cable ship during operations.  Please contact myself or Paul Deslandes, Project Manager (in copy)  if you have any queries regarding this notification or if you have any information on any underwater activity in this area that is relevant to the proposed operation.

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Pentland Floating Offshore Wind Farm Geophysical & Environmental Survey 2021



Mariners are advised that geophysical and environmental survey work will be carried out in the offshore areas and coastal sea areas west of the Pentland Firth.


Project Description The Pentland FOWF survey will be conducted by MMT on behalf of Highland Wind Limited).

Offshore Geophysical Survey task A detailed geophysical survey will be carried out in the offshore area north of Dounreay. The geophysical survey work will be conducted with a hull mounted Multibeam sonar with towed ROTV mounted Sidescan Sonar, Sub- Bottom Profiler and tethered magnetometer. Additionally, a seismic sparker will be towed behind the vessel. Mariners are advised to keep an aft safety clearance of the vessels of no less than 500m.

 

Port of Operation Ventus will mobilise in the port of Aberdeen, Scotland. The total geophysical survey is planned for approximately 31 days, but poor weather may extend these dates.Contact details for Fisheries Liaison: Fisheries Liaisons is being carried out by Brown and May Marine (BMM), for all fisheries enquires please contact BMM Fisheries Liaison Officer (FLO) Alex Winrow-Giffin: 07760 160039, alex@brownmay.com

 

Offshore Contact Details: Further enquiries should be addressed to the following people in the following order: 1. Martin Godfrey (MMT Project Manager), T: +44 (0) 1295 817 748, martin.godfrey@mmt.se 2. Kalle Flink (MMT Operations), T: +46 708 11 28 43, kalle.flink@mmt.se

 

Mariners are advised that survey vessel Pulsar and equipment will be used in the nearshore areas north of Dounreay.

 

The nearshore geophysical survey work will be carried out by SEP Hydrographic using survey vessel Pulsar from 21st June 2021. Geophysical survey work will commence from the 10m Contour working towards the nearshore.

 

Nearshore Project Description The PFOWF nearshore export route survey will be conducted by SEP Hydrographic on behalf of COP.

Geophysical Survey task A detailed geophysical and Environmental survey will be carried out in the nearshore area between the 10m contour and Intertidal area. The geophysical survey work will be conducted with a pole mounted Multibeam sonar with towed sidescan sonar, sub-bottom profiler and magnetometer. Mariners are advised to keep an aft safety clearance of the vessels of no less than 100m.

 

Port of Operation Pulsar will mobilise and work out of Fresgoe, Scotland. The total geophysical survey is planned for approximately 15 days, but poor weather may extend these dates.

 

Nearshore Contact Details: Further enquiries should be addressed to the following people in the following order:

  1. John Sadler (SEP Hydrographic Project Manager), T: +44 (0) 7876 638 048, john.sadler@sephydrographic.com
  2. Paul Dodd (SEP Hydrographic Director), T: +44 (0) 7887 861 617, paul.dodd@sephydrographic.com

 

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Neart na Gaoithe Offshore Wind Farm: Completion of Marker Buoy Installation



Mariners are advised that the marker buoy has successfully been deployed within the boundaries of the Neart na Gaoithe wind farm to mark the hazard identified in Notice to Mariners 149, issued on the 08/06/2021.


Mariners are advised that the marker buoy has successfully been deployed within the boundaries of the Neart na  Gaoithe wind farm to mark the hazard identified in Notice to Mariners 149, issued on the 08/06/2021.  The coordinates of the marker buoy are shown in Table.

 

Marker Buoy Coordinates (WGS84) 
Longitude (DDM) Latitude (DDM) 
002° 12.949' W 56° 18.190' N 

 

Schedule  

The marker buoy will be in position until the hazard has been recovered.   For updates on the progress of the works, information will be provided in the Weekly Notice of Operations available on  the NnG project website here https://nngoffshorewind.com/resources/.

 

Vessels Associated with the Activity 

Two guard vessels are currently on site supporting the Neart na Gaoithe Offshore Wind Farm construction. The guard  vessel will be two of the below, which can be contacted as follows, if required: 

 

Vessel name:  Seagull 
Vessel role:  Guard Vessel 
Call sign:  MVBO2 
On board contact:  Contact name: Vessel Master  Email: seagullbf74@gmail.com  Phone: +44 (0) 1261 878040 / +44 (0) 7895 919100

 

Vessel name: Artemis
Vessel role: Guard Vessel
Call sign: MVIX5
On board contact: Contact name: Vessel Master  Email: concordebf47@aol.com  Phone: +44 (0) 7949 663790 / +44 (0) 1261 455461 

 

Vessel name: Tranquillity S
Vessel role: Guard Vessel
Call sign: MJUH9
On board contact: Contact name: Vessel Master  Email: spousekeil@yahoo.com    Phone: +44 (0) 1346 454758 

 

General Safety Advice

Construction activities are ongoing within the boundaries of the Neart na Gaoithe Offshore Wind Farm.  Mariners are  advised to refer to the NnG Weekly Notice of Operations where up to date information regarding activities on site is  broadcast. A copy of this notice and the Weekly Notice of Operations can also be found at  https://nngoffshorewind.com/resources/ 

 

Marine Coordination Contact Details

 

The following contact can provide more information if required. Please note that specific queries can also be addressed  to the relevant vessel or shore based representative.

 

Telephone number  (daytime):  +44 (0) 1890 751415 (use Emergency contact only until further notice)
Emergency contact (24/7):  +44 (0) 7508 421406
Email:  nng.mc@smchse.com 
Address: NnG Offshore Wind Farm Marine Coordination Centre, Gunsgreen Basin, Eyemouth,  TD14 5SD 

 

Fisheries Liaison

Fisheries liaison associated with the activity will be co-ordinated by Natural Power. For any commercial fishery queries  please contact the NnG company Fisheries Liaison Officer (CFLO) Peter Berney, telephone: +44 (0)7391 402387 or email:  NnG.FLO@naturalpower.com. Offshore Fisheries Liaison Officers (OFLO) will be present on each construction vessel and  can be contacted via VHF Channel 16.

 

Distribution List 

A central list of recipients is maintained by the company Fisheries Liaison Officer; if you are not the appropriate recipient  of these notices, or do not wish to receive the notices in the future, please contact us at NnG.FLO@naturalpower.com.  A copy of this notice can also be found at https://nngoffshorewind.com/  

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Inch Cape Offshore Met Mast AIS currently non-operational



Please be advised that the AIS on the Inch Cape Offshore Met Mast is currently non-operational. The marine navigation lights, foghorn, aviation lights remain operational.


Please be advised that the AIS on the Inch Cape Offshore Met Mast is currently non-operational. The marine navigation lights,  foghorn, aviation lights and remain operational. This fault will be investigated and notification provided once the AIS is operational again. 

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Dropped Concrete Anchor Block - Viking Link Interconnector Project



The object dropped was a concrete anchor block measuring approximately 1m x 1m x 1.2m with a deployment line / rope. Side Scan survey to be deployed, diver intervention to rig up and removal via support vessel as the final step.


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Viking Link Project - HVDC Cable Laying and Burial



Mariners are advised about landfall works at Boygrift, Lincolnshire (English Landfall) planned for the Viking Link project which is an HVDC electricity transmission interconnector between Denmark and England.


Cable lay and burial works of the HVDC installation are planned to take place from: • Cable lay 10th May –23rd June 2021 • Cable Burial 12th May – 30th July 2021

The route length of the main HVDC interconnection (2x bundles power cables + 1x Fibre Optic Cable) is in the order of 620km. The work covered by this NtM is covering the first campaign of 51km in length starting from the UK the landfall at Boygrift.

 

The Cable Lay works are being carried out by: Prysmian PowerLink using Cable Enterprise Call Sign 2FOV9. Supported by a tug Norne Call Sign PCJR.

 

The Cable burial works are being carried out by: Asso.subsea using Atalanti Call Sign 5BYY2 using the trenching tool AssoTrencher V and the Argo Call Sign 5BDF3 using the jetting tool AssoJet III and trenching tool AssoTrencher IV.

 

Vessels are requested to pass at a safe speed and distance and fishing vessels are advised to remain a safe distance, approximately 550m (0.3 nautical miles) from the areas identified. During these works the vessel will have restricted manoeuvrability as it completes its work scope.

 

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

 

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

 

Works overview Following completion of the landfall the Cable Laying vessel Cable Enterprise will surface lay the cable on the seabed along the HVDC cable route.

In periods while the cable is exposed on the seabed guard vessels will be stationed to monitor the cable and provide advice to mariners.

 

Cable Burial will follow soon after the cable lay operations carried out by two vessels Atalanti and Argo. Where cable burial is not possible (due to service crossings and / or where seabed conditions are unfavourable), guard vessels will remain on site.

 

Service crossing As part of the first campaign the Viking Link HVDC cable crosses 11 existing service. While awaiting the post lay protection operation, Guard vessels will remain in place to monitor the exposed cable.

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Mattresses Installed - Viking Link Project



Mattresses have been placed on the Viking HVDC cable at the Hornsea 2 crossing interface and at the Babbage crossing.


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Galloper Windfarm - Defect of the Cable Protection System (CPS) inter-array cables



Defect of the Cable Protection System (CPS) on inter-array cable A1L. Another survey was carried out in May 2021 where a further 19 locations have been found with the same defect.


Mariners are requested to remain a distance of 50m2 away from the assets

 

As cable exposure is a known risk at Galloper and across the offshore wind industry, we would remind Mariners of the safety   information found on the KIS-ORCA website ‘The risks of fishing near cables and renewable energy structures.’   https://kis-orca.org/safety/the-risks-of-fishing-near-cables-renewable-energy-structures/ 

 

To avoid crossing cables when towing equipment follow the cable corridors- locations of the cables can be found on the   Galloper awareness charts via KIS-ORCA. 

 

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Unmanned vessel survey in Hywind Scotland Wind Park area



Use of a 2 meter long remotely controlled unmanned vessel to collect fish biomass information for the Hywind Scotland Wind Park area during June and July


As part of the Hywind Scotland Wind Park, Equinor has subcontracted Akvaplan-niva to perform a survey using an autonomous vehicle – Sailbuoy – in the park area. The Sailbuoy is only 2 meters long and weighs 60 kgs. It was deployed from Bergen on the 8th June and estimated arrival at Hywind Scotland is 29th June.

 

The Sailbuoy will have a pre-programmed mission plan, and will communicate to shore via satelittes. The Sailbuoy is driven by wind and sun, and the vehicle is equipped with solar panel and an echosounder as well as sensors for temperature, salinity and fluorescence.

 

The purpose of the study is to collect relevant data on fish in the Hywind Scotland area using instrumented glider. The method is expected to mainly give data on prevalence and biomass, and less information on biodiversity. The data gathering in Hywind Scotland will take approximately 30 days from arrival and completion is estimated around 29th July. After ended campaign in the wind park, the Sailbuoy returns back to Bergen for retrieval. The results from the glider campaign is important also for further technology development.

 

The Sailbuoy is collision and shock proven. It will be labelled with contact information.

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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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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. Successful retrieval of control sound recorder performed January 24. Failed retrieval of the sound recorder in wind park.


Update June 10:

A second attempt at retrieval of the sound recorder in Hywind Scotland Pilot Park will be made by end of August.

Update February 5:

Successful retrieval of control sound recorder performed January 24. Failed retrieval of the sound recorder in wind park.  A second attempt for retrieval of the sound equipment in the Hywind Scotland Pilot Park is being planned. The notice is prolonged and the location of the retrieved control equipment is removed from the notice.

-----

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).

 

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).Activity prolonged.

 

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  (The Control was retrieved January 24 2021 and location is removed from the map in the active notice.)

 

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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Survey - Berwick Bank Wind Farm and Marr Bank Wind Farm



SSE Renewables will be undertaking a boat-base ornithological survey within the Berwick Bank and Marr Bank offshore wind farm areas. The survey will be within the proposed Berwick Bank and Marr Bank wind farm site boundaries until the end of June 2021.


It should be noted that SSE Renewables are not requesting fishermen to relocate gear - on this occasion the vessel will work around any gear on location.

 

The ornithological surveys mobilised in July 2020. The expected completion of the ornithological surveys will be by end of June 2021, weather permitting, and therefore there may be the potential for an extension to the work duration.

 

The survey is to be split into a total of five surveys using the offshore survey vessel. These five surveys will be undertaken in separate spring / summer months between July 2020 and June 2021. The vessel will spend approx. 4-5 days at sea within the wind farm area during each survey.

 

During each survey campaign a total of eight 15km transects will be surveyed across the survey area.

 

 

 

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Greater Buchan Area to Sandford Bay Geophysical Survey (Jersey Oil and Gas plc)



Geophysical Survey of a proposed subsea cable route between the location of the proposed Buchan Fixed Facilities and Sandford Bay, close to Peterhead.


The Geophysical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

 

The Geophysical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate in Sandford Bay, approximately 1km offshore in the vicinity of the SSE Peterhead Powerstation. A further survey is planned between this location and the cable landfall close to the Powerstation, which is the subject of a separate notice. The survey will commence on between 15/07/2021 and 21/07/2021 and is scheduled to take between 12 and 16 days, depending on weather. 

 

Following this survey, the vessel will continue to carry out a subsequent Geotechnical  Survey from the Buchan location to the Forties pipeline. This is the subject of a separate notice.  

 

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy sonar equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

 

 

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Greater Buchan Area to Sandford Bay Geotechnical Survey (Jersey Oil and Gas plc)



Geotechnical Survey of a proposed subsea cable route between the location of the proposed Buchan Fixed Facilities and Sandford Bay, close to Peterhead.


The Geotechnical Survey is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The Survey is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

 

The Geotechnical Survey will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate approximately 1 km offshore in Sandford Bay, in the vicinity of the SSE Peterhead Powerstation. The survey will commence between 09/08/2021 and 21/08/2021 and is scheduled to take between 12 and 16 days, depending on weather. 

 

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during survey activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy seabed analysis equipment and will carry out seabed coring / sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

 

 

 

 

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Cable Protection Operations - Moray Offshore Windfarm (East)



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence remedial cable protection operations (rock placement) works at various locations within the bounds of Moray East Offshore Windfarm circa 22nd June 2021.


Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence remedial cable protection operations (rock placement) works at various locations within the bounds of Moray East Offshore Windfarm circa 22nd June 2021. The area of Operation is shown in figure 1 and table 1 below, this will be carried out using DP2 vessel Rockpiper below

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Cable Fault - BritNed HVDC Cable



The second cable repair is completed, but possible exposed cable remains a hazard. Consequently, the safety zone is still in operation.


Following 2 recent faults (caused by impact damage) in the same area and subsequent repairs to the BritNed HVDC Interconnector, the latest completed on 07/06/21, the repaired section although trenched, is still in the process of natural backfill and areas of exposure remain. A guard vessel (currently M/V FORTUNA) remains on site. 

 

We wish to remind ship’s captains of the presence of subsea cables and request that extra caution is exercised when operating near charted cables in order to avoid any incident. Due to changing seabed conditions it should not be assumed that all cables are buried.

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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

NSL Challenger

As above As above 13th April 2021 until further notice

Windcat19

2ATD3

As above As above 20th August 2020 Until further notice

 

As above As above  

GV Kinnaird 

GHNE

As above

As above

16th July 2020 Until further notice
GV Ability As above As above 16th July 2020 Until further notice

Acta Centaurus

As Above As Above 21st January 2021 until further notice
HST Harri As above As above 28th January 2021 Until further notice
Windcat 40 As above As above 4th Feb 2021 until further notice
Windcat 20 As above As above 12th May 2021 until further notice
       
Njord Forseti As above As above 04th June 2021 Until further notice
Rockpiper As above As above 22nd June 2021 Until further notice
Waterfall As above As above 30th March 2021 until further notice
Island Crown As above As above 20th May 2021Until further notice
Blue Tern As above As above 30th April  2021 until further notice
       

 

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Greater Buchan Area to Sandford Bay Marine Survey (Jersey Oil and Gas plc)



Environmental Baseline Survey (EBS) of a proposed subsea cable route between the location of the proposed Buchan Fixed Facilities and Sandford Bay, close to Peterhead.


The EBS is being carried out by GEOxyz Offshore on behalf of Jersey Oil and Gas plc. The EBS is one of a series of surveys being carried out by GEOxyz Offshore in the vicinity of the proposed Buchan Fixed Facilities and the Sandford Bay location, close to Peterhead. 

 

The EBS will commence at the location of the proposed Buchan Fixed Facilities, some 111km from Peterhead, and terminate approximatelty 1km offshore in Sandford Bay, close to the SSE Peterhead Power Station. A further survey is planned from this location to the cable landfall, which is the subject of a separate notice. The survey will commence between 27/6/21 and 3/7/21 and is scheduled to take up to six days, depending on weather. 

 

Following this survey, the vessel will continue to carry out a subsequent Geophysical Survey from the Buchan location to the Forties Pipeline. This is the subject of a separate notice.  

 

The survey will be carried out by the vessel Geo Ocean III, call sign LXGP. 

 

All vessels shall pass at a safe speed and distance, while fishing vessels shall remain at a safe distance (approximately 500m)(COLREGs Rule 16 & 18) from the areas identified during EBS activities. The Geo Ocean III will be restricted in her ability to manoeuvre and shall deploy subsea camera and sampling equipment during the course of the survey. The survey vessel will monitor Channel 16 at all times. Mobile contacts for the survey are listed at the end of this Notice. 

 

 

 

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Installation of Wave Energy Device (Mocean Blue X)



Leask Marine will be installing the mooring system and Blue X device at EMEC nursery site in Scapa Flow between the 8 June 2021 and 30 June 2021. The device is a wave machine that is 20 metres long and approximately 38-tonnes.


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Dogger Bank A UXO Identification & Clearance



The survey vessel Wind of Pride will conduct inspection works in the Dogger Bank A array area and DBA and DBB export cable route, from 03 June to 15 July 2021.


During the survey operation, Wind of Pride will be investigating previously identified potential Unexploded Ordnance (UXO) and potential archaeological contacts along the defined route on a 24-hour basis.  This will be conducted using a ROV from a static vessel and will not involve towing equipment along the route.  Wind of Pride will also conduct ROV inspection of seafloor infrastructure along the DBA&DBB export cable routes

 

While engaged in surveying, the vessel will be restricted in its ability to manoeuvre and will display the appropriate day shapes and lights. She will be monitoring VHF Channels 16 and 70. Vessels are requested to pass at a minimum speed to reduce wash, maintaining a minimum 1000 metre separation distance.

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XOCEAN USV Survey Operations - Irish Sea



Operations of remotely piloted Uncrewed Surface Vessels (USVs) are planned in the Irish Sea, operating out of Carlingford Lough and Rhyl / Whitehaven harbour. There will up to 3 USV’s operational at any one time.


Up to 3 XOCEAN USVs will be carrying out survey operations during June and July in an area to the south-east of the Isle of Man, between Douglas and Rhyl. The vessels will operate out of Carlingford, Whitehaven, or Rhyl.

 

Further details of the survey area can be found in the attachment.

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Array Cable Installation - Hornsea Project Two



Ørsted have commenced array cable installation with the Seaway Aimery and Seaway Moxie which will continue through to Q3 2021. The Simar Esperanca will commence trenching on or around 30th May 2021.


Array Cable Seabed  Installation

Ørsted will be commencing pre-lay surveys and seabed preparation for array cable installation with the Simar Esperanca and rock deployment with the Flintstone on or around 21st March 2021, shortly followed by array cable installation itself on or around 15th April 2021. In addition to this, Seaway Offshore Cables (SOC) and Sulmara may be trialling an autonomous survey vessel within the Hornsea Project Two array area which will be supported by a dedicated support vessel, queries related to this scope should be directed to SOC / Sulmara.

 

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. This Notice will be updated and re-issued when works are complete.

 

Note that the vessels will have limited manoeuvrability 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.

 

Please be advised that construction activities are ongoing within the wind farm, supported by Crew Transfer Vessels (CTVs) and survey vessels intermittently. The Deep Cygnus will be mobilising to site as a support vessel to the ongoing construction works on or around 28th May 2021. The MHO Grimsby continues to carry out construction geophysical surveys intermittently utilising a hull-mounted system within the proposed Hornsea Project Two Offshore Wind Farm site and the Wind Innovation remains on the project for construction support.

It is requested that all vessels operating near the construction area keep a safe distance and pass at minimum speed.

 

 

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Survey - Dogger Bank B Windfarm



The Fugro Venturer is due to undertake a Geophysical survey at the proposed Dogger Bank B windfarm location in the Southern North Sea, 193 kilometres East of Newcastle, between 4th April 2021 and approximately 10th July 2021.


Survey operations shall be conducted 24 hours a day and the vessel shall tow subsea sensors approximately up to 100m behind the vessel.  During operations the vessel will have restricted manoeuvrability. The Fugro Venturer will be surveying prescribed survey lines, which will require large turning circles, therefore, it is requested that all vessels operating within this area keep their distance, maintaining at least the 2,000 m exclusion zone around the vessel and pass at reduced speed.

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Telecom Cable Route Geophysical Survey - Irish CZ and EEZ west of Galway



EGS (Asia) Ltd will be performing a geophysical survey of a planned cable route within the Irish CZ and EEZ west of Galway using the the offshore survey vessel ‘RV Ridley Thomas’ Call Sign: V7JK2 from early June to early July 2021


Please be advised that R.V. Ridley Thomas IMO 8112744 will be conducting telecommunication cable survey activities for an undersea fibre optic communications cable within the Northeast Atlantic, west of Galway from around 10th June to early July 2021.

 

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 1/2 nm on either side at the locations and during these 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 the stern deployment of a sonar towfish tethered with steel cable at varying water depths to collect geophysical/bathymetric mapping data for a proposed undersea telecommunications cable. Towfish towing wire layback will be 3x water depth behind 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.

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Proposed Submarine Telecommunications Cable Geophysical Survey - West of Galway



EGS (Asia) Ltd will be performing a geophysical survey of a planned cable route within Irish territorial waters west of Galway. The survey will be conducted by the survey vessel ‘RV Ridley Thomas’ Call Sign: V7JK2 from early June to early July 2021


Please be advised that R.V. Ridley Thomas IMO 8112744 will be conducting telecommunication cable survey activities for an undersea fibre optic communications cable within the Northeast Atlantic, west of Galway from around 10th June to early July 2021.   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 1/2 nm on either side at the locations and during these periods noted above in order to avoid gear entanglement.   The work will include towed sonar survey and will be performed 24/7. The cable route survey operations include the stern deployment of a sonar towfish tethered with steel cable at varying water depths to collect geophysical/bathymetric mapping data for a proposed undersea telecommunications cable. Towfish towing wire layback will be 3x water depth behind the vessel stern. The maximum depth of tow operations will be approximately 100 metres. The sonar sensor will be towed approximately 20-40 metres from the seafloor. The survey corridor is 500 metres centred on the survey centerline.  

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Survey - Shetland HVDC Link/001



NKT, on behalf of Scottish Hydro Electric Transmission (SHE Transmission), will be undertaking a geophysical survey of the Shetland HDVC link cable route between Noss Head north of Wick and Weisdale Voe in Shetland. Activities ongoing 27/05/21 - 08/07/21.


The survey will be conducted using the Noordhoek Pathfinder and will involve the use of Multibeam Echosounder (MBES), Sidescan Sonar (SSS), Sub-Bottom profiler (SBP), Remotely Operated Vehicle (ROV), Unmanned Survey Vehicle (USV – nearshore Shetland only) and Magnetometer equipment, some of which will be towed sub-surface astern of the vessel. The Survey is being undertaken to enable the refinement of the cable route and the optimisation of trenching.

 

The extent of the planned survey is -/+100m either side of the route centreline detailed in this notice.

 

When using towed equipment, the total run-in length for Noordhoek Pathfinder is a minimum of 1200 m with a minimum turn radius of 320 m. As such, the vessel may at times be required to operate outwith the 200m wide survey area to facilitate survey line changes.

 

A Surrogate Item Test (SIT) for the purpose of verifying the capabilities of the MBES, SSS and MagSense systems will be utilised. The SIT will be completed in the Northern or Southern location detailed in this notice, subject to weather. A target weighing approx. 50kg will be deployed on the seabed, attached to a clump weight and marked using a bright yellow surface buoy. The approx. area required for the work is 40m wide x 100m long, and the survey vessel will remain in the vicinity of the SIT for the duration of the exercise (4-6 hours). On completion, the target will be recovered.

 

All vessels are required to comply with the COLREGS, especially rules 16 and 18 as the survey vessel will be restricted in her

ability to manoeuvre.

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Deployment of Conical Buoy - Neart na Gaoithe OWF



Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) have installed a conical marker buoy within the nearshore extent of the Export Cable Corridor.


As part of the preparation works for cable installation in the nearshore area of Thorntonloch, two short trenches of approximately 800 metres (m) are currently being excavated for a section of each export cable, with the material temporarily being side cast. The height of the side cast material will temporarily reduce the navigable water depth by up to 1.5m, which, due to the shallow water depths in the nearshore area, is greater than 5% of the water depth in some areas. To notify maritime users of this temporary change, a conical marker buoy has been installed at the seaward extent where the reduction is no longer greater than 5%.

 

The conical marker buoy installed is a SL B700, 1510mm in height and 700m diameter shown in Figure 2. The buoy has an interconnected mooring attached to a clump weight and an installed lantern. The lantern is emitting a yellow light with a character of flashing once every 5 seconds at a minimum range of 2 miles.

 

Schedule The conical marking buoy will be in position until the temporary side cast material is backfilled and the water depth is no longer reduced. This is expected to be completed towards the end of July 2021.

 

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Seagreen Offshore Wind Farm - Potential Unexploded Ordnance Identification Survey.



A potential unexploded ordnance identification survey will take place within the Seagreen Offshore Wind Farm site boundary.


A Potential Unexploded Ordnance (pUXO) identification survey will take place within the Seagreen Offshore Wind Farm site boundary. The survey vessel, Glomar Worker will utilise an ROV mounted magnetometer and video camera to conduct the survey of numerous targets to identify any possible UXO risk. Wind Turbine Generator positions, Inter Array Cable routes and 1 Offshore Sub-station location within the Seagreen site boundary will be surveyed.

 

The vessel will arrive at site on or around Sunday the 23rd of May. Survey works are expected to be concluded by July 21 however this period may be extended due to weather conditions.

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Installation of temporary marker buoy (as laid position) - Exposed Pipe



A Yellow Special Mark has been installed marking an exposed pipe


A temporary marker buoy has been positioned at the North of the end of the exposed duct shown in Fig 2 on the attached NtM (the highest point above sea level). The exposed duct protrudes approximately 20m from the seabed. The highest point is approximately 2.4m above seabed level or 6.5m below surface at LAT.

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WTG Installation and Commissioning - Moray East Windfarm



WTG Installation and Commissioning installation on the Moray East windfarm


Please be advised that Moray Offshore Windfarm (East) shall commence WTG installation on the previously installed jackets (Figure 2). WTG’s will be installed by the JUV Blue Tern. Once the WTG’s have been installed Acta Centaurus will transfer teams of technicians using a walk to work system to carry out commissioning works in readiness for energisation. Acta Centaurus will be supported by 2 CTV’s (HST Harri and Windcat 40). Installation and commissioning works will commence circa 05th January 2021 until completion

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Survey - East Anglia HUB Offshore Wind Farm



Scottish Power Renewables (SPR) has contracted Fugro GM Marine Limited (Fugro) to carry out a geophysical and geotechnical site investigation located east of Lowestoft, in the southern North for the proposed East Anglia HUB offshore windfarm site.


The East Anglia HUB offshore windfarm site is split onto three zones: East Anglia ONE North (EA1N); East Anglia TWO (EA2); and East Anglia THREE (EA3).  In 2021, Fugro will be initially operating in EA1N only with operations commencing on 5th February 2021, with operations in EA2 and EA3 commencing subsequently.

 

This Notice to Mariners will be updated and reissued periodically as additional vessels are planned to come on site.  For operations in 2021, current planning indicates a total of 8 vessels being on site between the period 5th February and 18th August 2021. It should be noted these dates are subject to change and the total number of vessels could increase.

 

Vessel Call Sign Area Dates Duration
Fugro Frontier C6BH4 EA1N - OWF & ECC 12/04/21 3 Weeks
Xplorer VSQN2 EA1N - OWF & ECC 20/05/21 4 Weeks
Haven Seariser 2 2FWX9 EA1N - OWF & ECC 05/04/21 8 Weeks
MTS Viking MCYN9 EA1N - OWF & ECC 05/04/21 8 Weeks
CRC Vanguard MERC2 EA1N - OWF & ECC 05/04/21 8 Weeks
Gargano VSMW5 EA1N - OWF & ECC 01/05/21 8 Weeks
Highland Eagle VQIE5 EA1N - OWF & ECC 01/05/21 8 Weeks
Fugro Galaxy C6YY4 EA1N - OWF & ECC 10/06/21 2 Weeks
Fugro Frontier C6BH4 EA2 - OWF & ECC 01/04/21 9 Weeks
Xplorer VSQN2 EA2 - OWF & ECC 17/05/21 4 Weeks
Haven Seariser 2 2FWX9 EA2 - OWF & ECC 05/04/21 8 Weeks
MTS Viking MCYN9 EA2 - OWF & ECC 05/04/21 8 Weeks
CRC Vanguard MERC2 EA2 - OWF & ECC 05/04/21 8 Weeks
Gargano VSMW5 EA2 - OWF & ECC 01/05/21 8 Weeks
Highland Eagle VQIE5 EA2 - OWF & ECC 01/05/21 8 Weeks
Fugro Galaxy C6YY4 EA2 - OWF & ECC 10/06/21 2 Weeks
Fugro Frontier C6BH4 EA3 - OWF & ECC 05/04/21 3 Weeks
Cargano VSMW5 EA3 - OWF & ECC 01/05/21 8 Weeks
Highland Eagle VQIE5 EA3 - OWF & ECC 01/05/21 8 Weeks
Fugro Galaxy C6YY4 EA3 - OWF & ECC 10/06/21 2 Weeks

 

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London Array OWF - Diving Operations



All mariners are advised that the Dive Support Vessels (DSV) ”MV C-Fenna” call sign: MBAH3 and ”MV C-Force” call sign: MITT4 will be onsite from 1/05/2021 for approximately 6 months to carry out diving operations.


These vessels will be supported by the” Spectrum 1” call sign: 2CQX3 and” Dalby Tees” call sign: 2FIA7 carrying out crew transfer operations. Works are to take place at various locations across the London Array windfarm As part of this work, Dynamic Bend Stiffeners will be installed using, subsea installation tools and divers within the London Array Wind Farm. Vessel: C-Fenna C-Fenna Dive Support Vessel (DSV) has a length of 26.5m and breadth of 11.0m. The C-Fenna uses a four-point mooring system. The C-Fenna will undertake mooring deployment within 150m of the assigned WTG. Equipment will be periodically deployed and suspended from the vessel crane during the work.

 

Planned Diving Locations and Restricted Access Zones:

The works is expected to commence on the 1st of May 2021 and continue for approximately 6 months. During this period diving locations will be selected from the list of locations as detailed in Figure 1. A total of three locations could be operational at any one time. Information about what location is presently being worked will be transmitted over VHF informing all local vessels of restrictions.

 

Prior to commencing diving operations 4 chain clump weights mooring will be deployed at the required WTG location. These moorings will be positioned as required to avoid known obstruction and expected current flows but will be within 150m radius of the WTG. Once deployed a 150m exclusion zone will be placed around the WTG. The Mooring will consist of two 12t chain cluster weights connected to a surface buoy. A yellow light flashing yellow once every 5 seconds.

 

 

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Moray East Offshore Windfarm - Walk to Work Operations



Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence walk to work operations work scope at all 3 OPS’s within the bounds of Moray East Offshore Windfarm


Please be advised that Moray Offshore Windfarm (East) Limited (Moray East) are planning to commence walk to work operations work scope at all 3 OPS’s within the bounds of Moray East Offshore Windfarm circa 19th May 2021 using Island Crown for approximately 40 days. Technicians will transfer via walk to work on all 3 OPS’s for commissioning and painting works.

 

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Export Cable Installation (Beach) - Hornsea Project Two



Ørsted continuing export cable installation works in the intertidal area as part of the ongoing construction of the Hornsea Project Two OWF.The export cable pull has been completed, the cable is exposed on the intertidal area prior to cable burial works.


Landfall Preparation and Cable Installation Please be advised that the second of three export cable pull-ins is complete and the SW cable (yellow, central circuit shown in Figure 1) is exposed on the beach prior to burial works commencing. The Maagd will be leaving site on or around 10th May 2021 and returning approximately 2 weeks later. In addition to this export cable installation activities in the intertidal area are ongoing at the landfall at Horseshoe Point, Lincolnshire and will continue until approximately 30th September 2021. Works will be continual and intermittent throughout these periods.

It should be noted that export cable seabed preparation and installation seaward of mean low water springs is ongoing until end of 2021.

 

Vessels:

 

Vessel & Call Sign Activity

Ndurance

5BVH3

Cable Installation and burial

Coastal Vanguard

PCFH

AHT

Linestroom

PICW

AHT
Maagd Landfall tranporattion barge

Titan Endeavour

2ELT9

Nearshore Survey

 

 

 

 

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Hazard Anchor Chain Approx 25m - Neart na Gaoithe Offshore Wind Farm



Mariners are advised that during boulder clearance works, the Sartor has discovered a seabed hazard within the boundaries of the offshore wind farm. The hazard has been identified as an anchor chain, with approximately 25m visible on the seabed surface.


A 50-metre exclusion zone is advised around the anchor chain for safety reasons.  

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Gwynt y Môr Cable Repairs



Briggs Marine Contractors (BMC) were contracted by Gwynt-Y-Mor OFTO to undertake a repair to the SSEC3 export cable due to a power core fault. The main works are completed. A small loop of cable remains unburied and raised above the seabed by approx. 2m


A north cardinal buoy is now in position 75m north of the cable loop on the following location and display a very quick flashing white light.

The marker buoy will remain in position until July 2022 when cable replacement works are planned to be completed by.

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Deployment of 2 x Metocean Buoys - North of Cromer



Partrac is to deploy two large metocean buoys (E03 and E13) at two separate locations approximately 18 miles northwest of Cromer and 28 miles north of Cromer in the southern North Sea 


Partrac is to deploy two large metocean buoys (E03 and E13) at two separate locations approximately 18 miles northwest of Cromer and 28 miles north of Cromer in the southern North Sea 

 

Once deployed, please maintain a 500m exclusion around each buoy.

 

Deployment is estimated to be carried out over one day from the 5th May 2021, weather permitting.

 

The deployments will be completed by the vessel Isle of Jura.

 

The surface buoys will include: AIS; A day shape of yellow St Andrews Cross; radar reflector; and yellow navigation light.

 

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

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Survey - North Fall Offshore Wind Farm (Proposed)



North Falls Offshore Farm Limited has contracted Fugro GB Marine Limited to carry out a geophysical & environmental site investigation in the North Sea for the proposed Windfarm (NFOW) site using Fugro Mercator callsign: C6DU5 from 10th May for 8-9 weeks


The North Falls Offshore Wind Farm site is located to the east of Felixstowe and bordering the Greater Gabbard and Galloper existing wind farms

 

Fugro Mercator - Offshore Geophysical Investigation

 

The geophysical operations at the North Falls site are expected to be carried out from the Fugro Mercator call Sign: C6DU5 from 10th May 2021 for approximately 8-9 weeks. Fugro Mercator will be conducting operations across the Main Array and Export Cable Route areas >10m LAT.

 

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

 

A continuous listening watch will be conducted on VHF Channel 16.

Survey operations will be conducted on a 24-hour basis  

Curtis Marshall - Environmental Investigation

 

The environmental operations at the North Falls site are expected to be carried out from the Curtis Marshall call sign: 2HWN3 from 1st July 2021 for approximately 7 days. Curtis Marshall will be conducting operations across the Main Array and Export Cable Route areas both offshore and nearshore.

Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress.

 

As the Curtis Marshall will be deploying equipment astern of the vessel, the vessel will require large turning circles and will be restricted in her ability to manoeuvre. All vessels operating within this area are requested to keep their distance, maintaining at least the 1,000m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

A continuous listening watch will be conducted on VHF Channel 16.

Survey operations will be conducted on a 24-hour basis  

 

Fugro Seeker - Nearshore Geophyscial Investigation

 

The geophysical operations on the North Falls export cable route from the 10m LAT contour inshore to the potential landfall, are expected to be carried out from the survey vessel Fugro Seeker call sign: 2HCS2 from 15th May 2021 for approximately 10 weeks.

Please note that the exact start and finish date will be dependent on the prevailing weather conditions and work progress.

 

As the Fugro Seeker will be towing survey equipment the vessel will require large turning circles and will be restricted in her ability to manoeuvre. All vessels operating within this area are requested to keep their distance, maintaining at least the 500m safety zone around the survey vessel, and pass at minimum speed to reduce vessel wash.

 

A continuous listening watch will be conducted on VHF Channel 16.

 

Survey operations will be conducted on a 12-hour basis.

 

 

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Havhingsten Cable - surface laid cable



Please be advised that there are three areas of surface-laid cable, pending rock placement works.


Please be advised that the remaining post-lay burial (PLIB) works of the Havhingsten fibre optic telecommunication cable system have now been completed in the Irish Sea, but there are three areas of surface-laid cable which are pending rock placement works.

 

There is a maximum of 25m of cable surface laid with Uradact protection either side of the crossings listed below. Rock protection works will be carried out during the second half of 2021. It is advised that extra care is taken when vessels are operating near the areas and that no vessel should trawl within 0.25 nautical miles from the listed coordinates prior to rock placement. The rock berms will be over trawlable and in-line with industry standards.

 

Rock Placement Location Name

Latitude

Longitude

Western HVDC (S1.5)

53 ° 45.9867' N

003° 48.9137' W

Western HVDC (S1.2)

53° 54.7007' N

004° 58.3552' W

Western HVDC (S1.4)

53° 53.8396' N

004° 34.1792' W

 

For further information please contact the Fisheries Liaison Officer (FLO) / Fishing Industry Representative (FIR) numbers:

 

IoM Onshore FLO

Guy Sutton:                        rgsutton@outlook.com – 07624428332

 

FIR

Tom Watson:                     tomwatsonfleetwood@btinternet.com – 07903 173624

 

FLO (MarineSpace)

Bethan Owens:                 bethan.owens@marinespace.co.uk – 07833 557808

Claire Griffiths:                  claire.griffiths@marinespace.co.uk – 07498 550 586

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Eastern Link - Marine Survey Operations



Marine Survey Works for the Eastern Link Project.These works precede the installation of a HVDC electricity transmission link from the East coast of Scotland (Sandford Bay, Peterhead) to the East coast of England (South of Bridlington/ Flamborough Head).


The marine survey works are being carried out by Next Geosolutions UKCS Ltd. on behalf of National Grid Electricity Transmission Plc and Scottish Hydro Electric Transmission Plc.

 

The marine survey activities are planned to commence at Sandford Bay and close to Peterhead from the 20th April 2021. Upon completion of the Nearshore Marine Survey at Peterhead the vessel will transit to Bridlington to complete the Nearshore Marine Survey at Bridlington. Works will continue along the offshore route until August 2021. The marine survey works covered by this NtM are to be conducted by three survey vessels, divided into the following activities, as indicated:

 

Date Activity Vessel Call Sign
20 April 2021 Nearshore Marine Survey Peterhead SV Humber Guardian 2ENC3
May 2021 Nearshore Geotechnical Survey Peterhead MultiCat Forth Warrior 2JHR8
20 April - Aug 2021 Offshore Marine Survey, Peterehead to Bridlington MPSV Ievoli Cobalt IBOK
April / May 2021 Nearshore Marien Survey Bridlington SV Humber Guardian 2ENC3
May 2021 Nearshore Geotechnical Survey Bridlington MultiCat Forth Warrior 2JHR8

 

The Nearshore works are to be conducted West, of point AC6, Longitude 1° 43.5’W at Peterhead and West of point AC61, Longitude 0° 03.7’W South of Flamborough Head, Bridlington, reference Figures 1 and 2 overleaf. All vessels shall pass at a safe speed and distance, whilst fishing vessels shall remain at a safe distance (approximately 500 meters) (COLREGs Rule 16 & 18) from the areas identified during marine survey operations. The aforementioned survey vessels will be restricted in her ability to maneuver and shall deploy towed sensors during geophysical survey operations only. The survey vessels will monitor VHF Channel 16 at all times. Mobile contacts for the vessels are listed at the end of this NtM.

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Unexploded Ordnance & Boulder clearance - Seagreen Offshore Windfarm



An unexploded ordnance and boulder clearance geophysical survey will take place within the Seagreen Offshore Windfarm site boundary.


The survey vessel, Geo Ranger will utilise towed array equipment with side scan sonar, sub bottom profiler and magnetometer to conduct the survey of all 114 Wind Turbine Generatorpositions and 1 Offshore Platform location within the Seagreen site boundary.The survey vessel is expected to arrive at site on or around Sunday the 21st of March and remain until August 21, weather dependant.

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Snagging Hazard - Dropped Object Clump Weight (360kg)



The dropped object is a clump weight (360kg). This is part of the DP taut wire system. From C10 the clump weight lays 162m north of the structure. The object rests 8m east of C10-C11 RPL.


JSA and Task plan are being compiled for a recovery with vessel crane and ROV intervention.

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Survey - Hornsea Four Offshore Windfarm



Hornsea Four Offshore Windfarm will be carrying out offshore geophysical survey using the vessel Northern Storm call sign: MISA7 from 6th April until end of July 2021.


Survey completion is anticipated by the end of July 2021. The full scope of the works is anticipated to take 90 days to complete, with approximately 45 days duration surveying the proposed export cable corridor and 60 days duration surveying the proposed windfarm array areas.

 

The vessel Northern Storm call sign: MISA7 will be utilised for this survey. A local scout vessel is also contracted to reduce potential for static fishing gear interactions.

 

The survey area will be covered using a full geophysical survey spread including towed equipment. It is requested that all vessels operating within the area keep a safe distance (at least 500m) and pass at minimum speed/reduced wash.

 

 

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Triton Knoll Offshore Wind Farm - Confirmed UXO Targets



Mariners are advised that two UXO targets have been confirmed within the Triton Knoll Offshore Wind Farm Array.


Please be advised that two UXO targets have been confirmed within the Triton Knoll Offshore Wind Farm Array.

 

Mariners are advised that the two confirmed targets are located within 20 metres water depth (LAT) and a 10 metre radius exclusion zone is required around each target.  The following table provides the coordinates and a description for each target.

 

Description of Target Latitude Longitude

Water Depth

(LAT) Metres

Required Exclusion

Zone (Metres Radius)

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

 

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Nearshore Pre-Cable Installation Works - Neart na Gaithe OWF



Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) are due to commence preparation works for the export cable installation, within the nearshore extent of the Export Cable Corridor. The works are due to commence on the 13th March 2021 at the earliest.


Two jack-up vessels, Capall Mara (MBSF3) and C57 Red Squirrel (J8B5722), will carry out a small amount of seabed preparation operations and undertake trenching works along a short section of the nearshore cable route.

The Capall Mara backhoe dredger will work along the two cables routes within the nearshore area, a first pass will be made where the vessel will reposition boulders between KP0.65 and KP1.4 followed by a second pass of each route where the vessel will excavate a trench within which the cable will be laid.

 

Excavated material will be temporarily repositioned to the side of the trench and will be backfilled by the Capall Mara once the nearshore cable installation is completed.

C57 Red Squirrel will work at KP0.65, to excavate two pits at the existing HDD exits and conduct minor construction works associated with the HDD exit point. The jack up vessel C57 Red Squirrel will arrive on site supported by two tugs, Forth Trojan (2FYM4) and The Battler (MGHD9).

A Crew Transfer Vessel, Celtic Guardian (21ZH5), will transfer personnel between the Capall Mara and C57 Red Squirrel and Eyemouth harbour each day. Celtic Guardian will also support with periodic minor surveys of the route. A dive vessel, CRC Tempest (MYUY7) will also work alongside the C57 Red Squirrel providing dive support associated with the minor HDD Construction works, as required.

Vessels are requested to remain at least 500 metres away from the Capall Mara and C57 Red Squirrel. Static fishing gear is requested to remain removed from the updated exclusion area

 

Area of Operations Mariners are advised that the Capall Mara and C57 Red Squirrel, alongside a number of supporting vessels, will be mobilised to work within the nearshore area of the NnG Export Cable Corridor' The nearshore exclusion zone will replace the existing exclusion area in place from the date of this notice.

Schedule The pre-enabling construction works are due to recommence on the 13th March 2021, at the earliest, and is expected to last approximately six weeks, until 30th April 2021, weather dependent. After this work, the preparation for cable installation will commence, in early May 2021, ahead of cable installation in June and July 2021. A further notice to mariners will be issued outlining the next phase in more detail.

Weather permitting, construction works will be carried out on a continuous basis (i.e. 24-hour working, seven days a week) on the Capall Mara and on a daytime only basis (i.e. 12-hour working, seven days a week) on the C57 Red Squirrel.

 

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Neart na Gaoithe Offshore Wind Farm - HDD Marine Works



Mariners are advised that Neart na Gaoithe Offshore Wind Farm Limited (NnGOWL) have completed the HDD supporting works within the nearshore extent of the Export Cable Corridor.


As part of the completed works, the two separate HDD ducts have been cut back to a level just above the seabed and capped in preparation for upcoming export cable works. The height of the end of the ducting above the seabed (stick-up height). Each HDD exit location has been marked temporarily by a surface marker buoy. As-laid positions of the marker buoys are also provided.

The next scheduled works are due to begin the week commencing 15th March 2021, at the earliest. A notice to mariners will be issued in advance of these works, to notify of the start date.

 

 

 

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Deployment of Buoys - West Gabbard



Recording oceanographic equipment has been moored at West Gabbard


There are a Smart Buoy and 2 yellow, Class 2 Guard Buoys carrying radar reflectors at the site.

All three buoys are fitted with a yellow light exhibiting the sequence FI Y (5) 20s.

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Exposed Cables - Galloper Offshore Wind Farm



Update from most recent subsea survey. There is evidence of sections of cable exposure in ten areas over seven cable routes of the Galloper windfarm. Locations noted below


 

Area Start  Stop
D1J - E2J 51°48.489'N 002°02.339'E 51°48.489'N 002°02.341'E 
E3H - E4H 51°55.322'N 002°01.231'E 51°55.322'N 002°01.224'E
E4H - E5H 51°54.568'N 002°01.180'E 51°54.565'N 002°01.176'E
OSP - D3A 51°57.151'N 002°01.879'E 51°57.127'N 002°01.876'E
OSP - F3C 51°57.455'N 002°02.816'E 51°57.472'N 002°02.141'E
OSP - F3C 51°57.508'N 002°02.564'E 51°57.513'N 002°02.587'E
OSP - F4E 51°57.100'N 002°02.148'E 51°57.100'N 002°02.150'E
OSP - F4E 51°57.101'N 002°02.462'E 51°57.101'N 002°02.462'E
OSP - F6G 51°56.400'N 002°01.586'E 51°56.399'N 002°01.587'E
OSP - F6G 51°56.369'N 002°02.200'E 51°56.369'N 002°02.200'E

 

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

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Lost CPT rod - Eastern Link 1



During CPT operations a CPT rod broke and was lost to the seabed. The rod is made of steel and is 3.6cm in diameter. It is estimated that 0.75m of rod is protruding above the seabed.


The cone and friction rod were also missing at recovery and are most likely curried under the seabed. These are also made of steel with the same diameter. The cone is 35cm long and the friction rod is 30cm long. 

 

There may be a minor risk to trawler’s fishing gear if they trawl over this location, however, it is more likely that any trawling gear would break the rod below the seabed.

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Triton Knoll Offshore Wind Farm - Navigation Warning



Mariners are advised that the remnants of a Wave Rider Buoy sinker weight and partial rigging are located within the Triton Knoll Offshore Wind Farm Construction site.


Mariners are advised that the remnants of a Wave Rider Buoy sinker weight and partial rigging remain in position at:

 

Latitude Longitude Water Depth (LAT)
53° 30.442N 000° 50.564E 19.7m

 

It is advised that the partial rigging could potentially be floating up to 9.7m above the seabed, reducing the navigable safe water in the immediate area to 10m LAT.  Mariners are advised to avoid the indicated position by 250 metres.

 

Possible Dangers to Navigation Properties of the polypropylene show that the rope is buoyant, this makes the line sensitive for thruster currents. Taking the site water depth into consideration (19.7m LAT) and the maximum expected height above seabed of the rope 9.7m the line is expected to be floating submerged at approximately -10m LAT. In addition, it is noted that over time sediments will be trapped between the fibres and the heavier rope may finally sink. The polypropylene rope may impose a risk to foul propellers/propulsion of vessels due to the buoyant nature of the rope. As the rope is submerged at a depth of ~-10m LAT the risk is considered minimum for vessels with a shallow draught (<5m) and medium for a vessel with a deeper draught (>5m). Over time sediments will be trapped between the fibres and the heavier rope may finally sink thereby reducing the risk to propellers/propulsion of vessels. The clump weight itself (chain) is expected to have sunk into the seabed and has no significant height above seabed. In addition, the edges of the clump weight are mostly rounded (chain), the risk the clump weigh imposes to fishing activities/gear is therefore considered to be minimal.

***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.
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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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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.


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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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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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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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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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.

 

The SONAR imagery acquired during the recovery attempt indicated the riser line (the main aspect of concern) to be still attached to the anchor weight and suspended in the lower part of the water column. Given the elapsed time, the line will be fully saturated and neutrally buoyant and fully submerged. It is anticipated that the action of tidal currents on the line will cause it to knock down and eventually become entangled in the frame and other gear. Whilst it has not been confirmed, it is unlikely that the line would remain close to the surface.

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