Underwater Construction Vessel (UCV)

An underwater construction vessel (UCV) is an offshore vessel equipped to build and install subsea structures underwater using work-class ROVs, divers, and active-heave-compensated cranes: foundations, manifolds, protection structures, and tiebacks. The term is largely synonymous with the offshore construction vessel and overlaps the multipurpose support vessel; the defining capability is precise DP2/DP3 station-keeping, a moonpool, and a deepwater crane rated for through-water landing of subsea modules. Lifting and diving operations follow IMCA construction and ROV guidance with project-specific dropped-object and stability analyses.