Page 16: of Marine Technology Magazine (October 2013)

OSD-IMT, a division of Offshore Ship Designers, se- cured a design contract for two IMT 965 seismic sup- port vessels with a bollard pull in excess of 50 metric tons for China OilÞ eld Services Ltd. (COSL), Beijing. The vessels will be used to provide a range of support activi- ties to larger seismic vessels which operate continuously for months when conducting seismic surveys. Designed to have a multi-role capability in support of the mother ship, they can be used for refuelling, fresh water replenishment, the provision of refrigerated stores and dry provisions, the supply of spares and general stores, emergency towing and escort support and guard duties.The IMT 965 carries 980 cu. m. of cargo oil for refueling the mother ship, either alongside or ahead. Fuel is pumped to the mother ship from a deck-mounted fuel supply module located on the working deck of the IMT 965. Up to 500 cu. m. of fresh water can be supplied in a similar way. Cold stores and dry provisions totaling 80 cu. m. can be ac- cessed directly from the working deck of the IMT 965, pro- viding easy access for transfer to the mother ship, either by the shipÕs crane or by a crane mounted on the mother ship. The operating cycle for the IMT 965 requires it to be on sta- tion shadowing the mother ship for prolonged periods. Dur- ing this time the IMT 965Õs activities include keeping passing vessels clear of the streamer arrays and ensuring that there is a trafÞ c-free area ahead of the mother ship. The vessel is classed with a DP1 notation which will allow it to shadow the mother ship at a preset distance for long periods.The main IMT 965 propulsion arrangement is a hybrid sys-tem, comprising twin CP propellers, each driven by a medium- speed diesel engine. A PTO/PTI alternator/motor is connected to each main gearbox, and two 360 kWe diesel generators are also provided. The system is arranged such that one main en- gine can drive both propellers for maximum fuel economy. IMT 965 Main Particulars LOA ...............................................................................64.9m LBP .................................................................................58.2m Beam ................................................................................16m Draft ..............................................................................5.65m Total Deadweight ............................................1,800 metric tons Speed .........................................................................13 knots In the Yard OSD-IMT Wins Contracts for COSL Seismic Support Vessel Deals Photo: OSD-IMTOctober 201316 MTRMTR #8 (1-17).indd 16MTR #8 (1-17).indd 1610/15/2013 3:57:33 PM10/15/2013 3:57:33 PM