The Global Tech 1 (GT-1) project concerns the realization of a new HVAC grid connection between the offshore substation BorWin Gamma and the grid connection point (OSS) on the OWF Global Tech 1 by jointing the existing cables and new cables.

The system is composed by two power cables with an interstitial optical unit that will be simultaneously laid and buried independently from each other on two parallel routes of approx. 14.5km length each.

Prysmian has awarded ASSO a contract for the execution of work includes 29km (2 cables, 14.5km each) submarine cable installation and protection including the initial pull-ins on platform and joining of the new cables with the existing ones.

ASSO’s scope of work included:

  • Preparation activities // Mobilization activities 
  • Platform pull-in
  • Jointing operations (vessel serves as working platform) 
  • Simultaneous lay & Burial 

Vessel/Equipment used:

  • Atalanti
  • Artemis
  • HydroPlow
  • Atom ROV


Project Specifications

Global Tech 1 - Submarine Link Cables Installation and Protection

Prysmian PowerLink Sr
Cable Type:
Power 2x 155kV HVAC Cable
Cable Diameter:
Service Provided:
Cable Transpooling – Pull-in on platform – Simultaneous Laying/Burial - Jointing
Laying Length:
TenneT TSO GmbH
Jetting Length & Burial Depth:
26950m @ 1.5m
North Sea, Germany
Max Water Depth: