History
Semi submersible crane vessel (SSCV) ''Hermod'' was constructed in 1979 by Mitsui Engineering & Shipbuilding Co., Ltd. ''Hermod'' and sister vessel, ''Balder'' were the world's first semi-submersible crane vessels. In the early 1980s these vessels set several lift records while operating in the North Sea. ''Hermod'' was retired at the end of 2017. She was loaded on '' Dockwise Vanguard'' and taken toDesign
The hull consisted of two floaters with three columns each. The transit draught of 12 meters was normally ballasted down to 25 meters for lifting operations; at that load, the floaters (with a draught of 12 meters) were well-submerged, reducing the effect of waves and swell. Propulsion was by two controllable pitch propellers and two forward, retractable, controllable pitch thrusters. The helicopter deck was capable of sustaining a Sikorsky 61-N. Up to 336 people could be supported in the air conditioned living quarters.Cranes
The ''Hermod'' had two cranes at the stern. Originally the starboard-side crane was rated at and the port-side at . In 1984, the lifting capacities were upgraded to respectively. The main hoist could lift above the work deck. The auxiliary hoists could lower to a depth of below the work deck. A tandem lift using the main hoists could lift at a radius.Footnotes
External links
* {{DEFAULTSORT:Hermod, SSCV Semi-submersibles Ships built by Mitsui Engineering and Shipbuilding Crane vessels 1979 ships