Subsea Cables

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Caithness - Moray HVDC Link - Cable Laying

Cable Laying

ABB will undertake cable laying and a simultaneous ROV survey of the as-laid cables during May, June and July 2017 using the CLV Victoria call sign: LAWV7 The Cable will be laid in 2 campaigns

Campaign 1 from Noss Head to approx.  58°06.416'N 002° 35.737'W where the cable end will be wet stored.

Campaign 2  from Portgordon to approx. 58°06.416'N 002° 35.737'W where the cable end will also be wet stored prior to omega jointing being carried out.

In nearshore waters at Noss Head the cables will be attached to an onshore winch wire and pulled through the pre-installed ducts.

At Portgordon, with assistance from 4 work boats, zodiacs and divers the cables will be floated in with the aid of flotation bags, attached to an onshore winch wire and pulled through the pre-installed ducts. Once the cables are anchored on shore the CLV Victoria will commence laying operations. Once both cables have been laid the ends will be lifted to deck and jointing operations will be carried out and the resulting omega joint laid down on the seabed. Until further notice 5 guard vessels will patrol along the cable route.

There is a working area 250m either side of the cable route centreline coordinates given by the route position list above and other seafarers are requested to keep clear during these operations.

 

 

During the period May 2017 to end September 2017 in the areas shown below NKT will carry out diving operations to fit bell mouths and seals, grouting of HDD's and the fitting of cable protection systems.

58°27.841'N 003°03.012'W

58°27.773'N 003°02.823'W

58°27.810'N 003°02.767'W

58°27.885'N 003°02.925'W 

The corner coordinates given above include a 250m working area for vessel manoeuvres and other seafarers are requested to keep clear during these operations.

58°40.527'N 003°01.615'W

58°40.527'N 003°02.164'W

58°40.821'N 003°02.164'W

58°40.821'N 003°01.615'W

The vessels that will be used during diving operations will be the Shuna and either the Teal or Woodstock 1 depending on availability.

The Teal or Woodstock 1 will be the dive support vessel and will deploy a 4 point mooring system, Shuna will handle anchors and be a support vessel.ing the period May 2017 to end September 2017 in the areas shown below NKT will carry out diving operations to fit bell mouths and seals, grouting of HDD's and the fitting of cable protection systems.

 

 Trenching Operations

The Caithness - Moray HVDC Link will be a twin bundled High Voltage DC interconnector (single cable diameter 132mm) installed by ABB HVC for Scottish Hydro Electric Transmission (SHE T) stretching approximately 113 km across the Moray Firth from Portgordon in Moray to Noss Head in Caithness.

Trenching Operations from 20/03/17 and 30/06/2017

Between: 57°39.807'N 003°01.903'W  -  58°28.800'N 003°03.314'W 

Vessel:  Siem Ruby   MV C-Odyssey   Remote Sensor   Marine Sensor

 

For further information: Richard Creed, ABB Tel: +44 7802 225532  email: Richard.creed@se.abb.com

 

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  • 2. N Sea Central
  • 3. N Sea South / E Channel
  • 4. SW Approaches / W Channel
  • 5. Irish Sea
  • 6. NW Approaches
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