Offshore Construction Vessel (OCV)

An offshore construction vessel (OCV) installs and maintains subsea infrastructure: manifolds, templates, risers, spools, and the connections between wells and floating production units. The core fit-out is a large active-heave-compensated subsea crane, often 150 to 400 tonnes, a moon pool or over-side launch, deck space for the structures, and one or two work-class remotely operated vehicles. Dynamic positioning to class DP2 or DP3 holds the vessel over the field through the lift. The OCV overlaps the dive support vessel and the pipelay vessel, and a multipurpose unit may combine construction, light pipelay, and diving on one hull to cover an entire subsea campaign.