Amprion launches UXO and geosurveys in Germany’s Wadden Sea
Since October, Amprion has begun UXO (unexploded ordnance) and geophysical surveys for its DolWin4 offshore cable network in the Wadden Sea, a UNESCO World Heritage Site on the northern coast of Germany, near the island of Norderney. These surveys assess the seabed for potential ordnance and soil conditions essential for laying the submarine cable. In partnership with Sulmara and Prysmian, Amprion is committed to minimizing environmental impact on this sensitive ecosystem through cutting-edge technology.
An unmanned, battery-powered survey vessel is operating in the Wadden Sea area between the German coast and Norderney. Designed with a shallow draft and low noise output, this vessel minimizes disturbances to local wildlife. Additionally, an ultra-light survey drone is flying over Norderney to map the cable’s future route. For nearshore areas, a conventional crewed ship is used.
Germany’s renewable energy infrastructure
The DolWin4 and BorWin4 offshore grid connections are central to Germany’s renewable energy transition. Scheduled for completion in 2028, these projects will link the North Sea’s offshore wind farms to the mainland, delivering sustainable power across Germany. Extending 60 to 125 kilometres underwater before reaching the Norderney coast, the cables continue about 155 kilometres inland to the Hanekenfähr substation in Lingen, Lower Saxony. Here, they connect to Amprion’s power grid, replacing capacity lost from the closure of the Emsland nuclear plant in 2023. Together, DolWin4 and BorWin4 will provide 1.8GW of offshore wind energy, reinforcing Germany’s commitment to renewable power.
