Dive Support Vessel (DSV)

A dive support vessel (DSV) is an offshore vessel that supports commercial diving on subsea infrastructure, built around a saturation diving system, a moon pool or over-side launch, and a diving bell. Saturation diving lets divers live under pressure in deck chambers for weeks and transfer to the work site by bell, so a DSV handles deep, long-duration tasks on pipelines, wellheads, and platforms that surface-supplied diving cannot. Dynamic positioning to class DP2 or DP3 holds the vessel over the dive site without anchors, and a heave-compensated bell launch protects the divers. Larger units double as construction vessels with subsea cranes and remotely operated vehicles.