Greece-Based Asso.subsea Awarded Nearshore Cable Installation Scope for TenneT’s Offshore Projects

Greece-based offshore contractor Asso.subsea has been awarded the nearshore cable installation scope for TenneT’s three projects offshore Germany. The three projects are part of TenneT’s 2GW program and include BalWin4, LanWin1, and LanWin5, located off the northwestern coast of Baltrum Island.

This marks the beginning of a new collaboration between Asso.subsea and Jan De Nul, acting as the main contractor, with TenneT as the end client. Each project involves the transportation and nearshore installation of a complex cable bundle comprising two HVDC power cables, one metallic return cable, and one fiber optic cable.

Installation for BalWin4 is scheduled for 2027, while LanWin1 and LanWin5 installations will be completed in 2028 and 2029, respectively. The scope of work includes cable transpooling from load-out ports in the Netherlands or Germany, precision cable landing via beaching operations with spud cans, and cable free-lay in intertidal zones and wet storage of cable ends.

The installation operations will be carried out using the 2008-built CLV Atalanti, which will be specially modified to accommodate the four-cable bundle configuration.