Marine Tug Boat Deck Crane Telescopic Boom Crane

Tug Boat Pedestal Crane
The pedestal Mounted Crane comprises a steel crane house, bolted to the pedestal via the slew bearing, a lattice or box girder type boom and various hoist tackles to control the boom and the lower blocks. ... The boom hoist runs from the top of the crane house to the boom tip and controls the radius of the lower blocks.

An offshore crane is defined as a pedestal-mounted elevating and rotating lifting device used to transfer materials and personnel to or from marine vessels, barges, and structures, a standard used to design and manufacture offshore cranes.
These offshore applications include bottom-supported, floating platform and ship-hulled vessels used in production and drilling operations, shipboard applications and heavy-lift applications.