HeavyLift@Sea, a German designer of offshore and multipurpose vessels, has presented a design for a purpose-built Offshore Accommodation Vessel (OAV) for operations at offshore wind farms.
The OAV serves as a base for up to 60 technicians and crew members. It features 60 single cabins, acoustically insulated bulkheads and decks in the accommodation area and adjacent to thruster rooms, engine rooms and hydraulic rooms, and a roll reduction tank system.
The vessel is 71.40 metres long, with a breadth of 16.70m and a maximum draught of 5.60m. The speed of 13 knots is achieved by two main engines of 1,400 kW, three auxiliary engines of 1,200 kW and two controllable pitch propellers. The vessel also has two high lift flap rudders and five transversal thrusters.
The OAV features a conventional diesel-mechanical propulsion system. The exact positioning and station keeping (DP2) of the vessel is secured by three bow thrusters and two stern thrusters in combination with the propellers and the rudders.
The vessel also has a covered warehouse for spare parts and tools. The dimensions of the cargo hold are 10.8m x 15.2m, allowing the stowage of 6 TEU containers. The cargo hold is covered by two pontoon hatch covers.
The respective deck area covers 300m². The deck crane of SWL 25t@20m is arranged portside and is of the knuckle boom type.