Acta Marine vessels complete beach trials for TenneT

Acta Marine’s DP vessels Coastal Crown and Coastal Challenger have successfully completed beach trials at Wijk aan Zee last week on behalf of TenneT for a cable burial campaign scheduled for spring 2022 for the Hollandse Kust (noord) and (west alpha) offshore connection.

Acta Marine will assist with the laying of the cables in shallow water in 2022. Coastal Crown, Acta Marine’s first commercial workboat with both Tier-3 engines and hybrid/ battery power, will be equipped to supply adequate water pressure to a submarine cable excavator with caterpillar tracks. Next spring, the tracked vehicle ‘Moonfish’ will drive from the beach to a water depth of 15 meters to bury the first part of the export cables for the offshore wind farms Hollandse Kust (North) (West Alpha). A total of four power output cables will be buried up to 8 meters below the beach/sea floor.

For the recent campaign, the DP1 Ultra Shallow Draft Support Vessel Coastal Challenger was brought in to assist with the handling of the floating line. The floating line was connected to the “Starfish” trencher on the beach of Wijk aan Zee, for a complete feasibility check of the technical working method.

The wind farm Hollandse Kust (north) will become operational in 2023 and Hollandse Kust (west Alpha) in 2024. A new transformer station is built at Beverwijk for this connection. In the meantime, along the A9 motorway near Beverwijk, the casing tubes are now buried in the ground. The electricity cables that TenneT will use to connect offshore wind farms to the high-voltage grid will soon be pulled through here. Source: Acta Marine

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