Concept

Hydraulic winch in a rotating drum driven by anything from a hand crank to a large prime mover that hauls on a rope, wire, or similar object and also pays out the rope. Typical winches on board a ship would include large fishing and towing winches on offshore fishing vessels/ salvage and offshore tugs/ research vessels and the like

Hydraulic windlass is a special version of winch used to recover or pay out heavy weight, such as an anchor windlass(which on merchant ships are frequently doubled up) to recover either anchor with on device. The recovered chain is stored in a chain locker below the deck, forward of the collision bulkhead, and the bitter end of the chain is connected to a pad eye, to avoid letting all the chain disappear into the ocean