OSD to design efficient seismic support vessels

Offshore Ship Designers is to design a series of new fuel-efficient seismic support/chase vessels ordered by French contractor Bourbon, which will be built at Dubai’s Grandweld Shipyards.

Offshore staff

IJMUIDEN, the Netherlands -- Offshore Ship Designers is to design a series of new fuel-efficient seismic support/chase vessels ordered by French contractor Bourbon, which will be built at Dubai’s Grandweld Shipyards.

The six, 53-m (174-ft) long vessels will feature a fuel-efficient hybrid propulsion system designed as an economic solution for the varied conditions required to support seismic surveys. These include transit speed, slow speed escort, and support work plus a high degree of maneuverability.

The vessels will be chartered by Bourbon to CGGVeritas with delivery of the first slated for end-2012.

Key feature of the hybrid propulsion system include:
• Two main marine diesel propulsion engines, two controllable pitch propellers in nozzles, two main gearboxes each with a PTI electric propulsion motor and three diesel-driven generating sets, and two electrically driven bow tunnel thrusters
• Diesel-mechanical mode using main engines only for the transit operation
• Diesel-electrical mode with main engines declutched using PTI propulsion motors powered by the gensets for chase and slow speed operation
• Boost mode with main engines and PTI propulsion motors (powered by the gensets) engaged used for towing operation
• Automatic selection among the different propulsion modes.

Main particulars are length 53.8 m, beam 13 m (42.6 ft), depth 5.8 m (19 ft), load draft 4.8 m (15.7 ft), cargo fuel capacity 850 cu m (224,546 gal), marine gas oil fuel 260 cu m (68,685 gal), potable water 100 cu m (26,417 gal), refrigerated and dry storage capability as well as space on deck for stowage of stores containers.

07/19/2011

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