Offshore wind contractor Seaway 7's jack-up wind installation vessel Seaway Ventus is preparing for its first mission to transport and install offshore wind turbines for the Gode Wind 3 and Borkum Riffgrund 3 offshore wind farms in the German North Sea.
The construction of the "Seaway Venture" started on November 25, 2021 at the Haimen base of China Merchants Industry, launched on January 10, 2023, and was delivered and departed from the factory in December 2023, setting sail for the operating sea.
The ship has a total length of 142 meters, a width of 50 meters, a depth of 11 meters, and is equipped with a living platform and a deck that can accommodate 130 people. The platform is naturalized DNV, and the flag country is Norway, and the draft is 62 meters, the design speed is 10 knots, the deck variable load is 8750 tons, the main deck clearance area is 4600 tons, the load is 10 tons, the main crane lifting capacity is 2500 tons @ 30 meters, of which the boom has a telescopic function of 1600 tons @ 48 meters. It is equipped with 4 truss legs, the total length of the legs is 109 meters, and the maximum operating water depth is 65 meters. At the same time, the platform is equipped with a DP2 system, and the propulsion system is all electric propulsion.
In November 2021, Seaway 7 signed a contract with offshore wind developer RSTED for the transportation and installation of offshore wind turbines for the Gode Wind 3 and Borkum Riffgrund 3 projects.
Among them, the Gode Wind 3 offshore wind farm is located in the North Sea of Germany, with an installed capacity of 242MW, and plans to install 23 Siemens Gamesa 11MW offshore wind turbines and an offshore substation. The Borkum Riffgrund 3 offshore wind project is located 53 km away from Borkum Island, with an installed capacity of 913MW and plans to install 83 offshore wind turbines of the same type.
At present, all monopile foundations of the Gode Wind 3 project and offshore substations have been installed in place, and the installation of monopile foundations for the Borkum Riffgrund 3 project is underway. The two offshore wind farms will be built in tandem and will generate enough renewable electricity to power 1.2 million German homes.