The COBRA cable project consist of the power link between Denmark and The Netherlands and it has been developed by and TenneT TSO B.V. The purpose of COBRA Cable is to allow for the integration of more renewable energy into the Dutch and Danish power systems and to increase security of supply. The power link will also help to intensify competition on the north-west European power markets. Strong power links between the European countries make it possible to integrate markedly more wind energy into the European power systems.

The cables system that was installed is composed by:

  • 2 High Voltage Direct Current (HVDC)
  • 1 Fiber Optic (FO) cable

Prysmian Group has awarded Assodivers Group the cable installation and protection operations (Simultaneous Laying/Burial) of German offshore sections of the route.

Vessel / Equipment used

  • Atalanti
  • Artemis
  • HydroPlow
  • Atom ROV

Project Specifications

COBRA Project - German Offshore Section

Prysmian PowerLink SRl
Cable Type:
Power 2x HVDC Al & 1x FO
Cable Weight:
Power: w.a 45.3kg/m w.w 32kg/m FOC: 3kg/m w.w 2kg/m
Cable Diameter:
Power: 147.5mm FOC:35mm
Service Provided:
Cable Transportation – PLGR - Simultaneous Laying/Burial
Owner: and TenneT TSO B.V
Trenching Length & Burial Depth:
42,000m @1.0m 16,000m @1.5m
North Sea
Max Water Depth:
40 m