50Hertz provided the grid connection for Arkona via the Ostwind 1 cable system, linking the offshore wind farm area to 50Hertz’s onshore substation at Lubmin in Mecklenburg-Vorpommern. The Ostwind 1 system was described as 93 km in total length, comprising an approximately 90 km offshore section and a 3 km onshore section, and was used to connect both Arkona and Wikinger to the onshore transmission grid.