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    Newly re-named construction vessel gets 400 ton AHC crane

    Equipment & Technology // January 27, 2006

    National Oilwell Varco in Norway has provided Offshore Shipping Online with details of a huge active heave compansated (AHC) crane it is supplying for the Boa Sub C (formerly known as Boa Deep C II), which is approaching completion at Factorias Vulcano in Spain.

    The huge 400 ton crane for the vessel is so large and the winch for the crane so large and heavy that it has to be accommodated on the tank-top, rather than above deck. 

    National Oilwell Varco is supplying a 400 tonne ‘Hydralift’ pedestal-type, knuckleboom crane, with an external, active heave compensated winch, with lifting capacity of 90 tons at 42m, 300 tons at 18m, and 400 tons at 15m. The lifting capacity of the auxiliary winch is 40 tons at 45m, and the winch itself has capacity for 3,000m of wire. 

    Also to be supplied by the company for the vessel is a somewhat smaller Hydralift knuckleboom crane, with lifting capacity of 18 tons and 20m, 30 tons at 15m, and 40 tons at 12m, and capacity for 3,000m of wire.

    National Oilwell Varco is also supplying the 600 ton, frequency-controlled ‘Hydralift/AmClyde’-type anchor handling and towing winch for Boa Sub C, along with the company’s LOADLIM safety system.


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