GONDAN Shipbuilders is building the 120 m C513 Ocean Energy Support Vessel for Østensjø Rederi, with delivery scheduled for the second half of 2027.
The vessel has a moulded breadth of 23 m and a deadweight of about 7,500 t at a draught of 7.6 m. Its work deck covers 1,400 m² and includes an ROV hangar. Accommodation is provided for 173 people in 29 single cabins and 72 double cabins.
C513 is intended for offshore construction, subsea installation, inter-array cable laying and repair, dredging, ROV inspection, diving support and personnel transfer. The vessel is also designed to support CSOV and walk-to-work operations.
The propulsion system will use six variable-speed diesel engines, each rated at 1,901 bkW. The vessel will be equipped with three 1,500 kW CPP azimuth thrusters and three 1,500 kW bow thrusters.
Its deck equipment includes a 250 tm active heave compensated offshore crane, two launch and recovery systems and two WROVs. The vessel will also be able to carry two cable carousels with a total capacity of 2,500 t.
Østensjø Rederi announced the shipbuilding contract with GONDAN Shipbuilders on 26 August 2024. Salt Ship Design developed the vessel design.
According to the contract announcement, the vessel is intended for inspection, maintenance and repair work, offshore construction, walk-to-work operations, accommodation services and cable laying.
