Average speed of recovery two shots of chain cable when three shots are submerged and freely suspended at commencement lifting (m/s)

A device, which is linked with the towboat, and under emergency conditions, tows away any ship from site. The device consists of reel 、towing hawser、signal cable、 buoy、 wire storage box、signal lamp etc.

Maximum speed, maintained by a winch when it is bearing the drum load (m/s)

A craft which is operable on or above water and which has characteristics different from those of conventional displacement ships. Within the aforementioned generality, a craft which complies with either of the following characteristics: .I the weight, ...

A power-operated device with one or two drums to ensure that the working part of the fibre rope is reeled in no more than one layer. It may be used in conjunction with a rope storage reel.

A powered hinge.

A winch designed for hoisting and lowering the life boat.

Activated by means other than a directly connected prime mover.

A kind of winch designed for hoisting and lowering the work-boat.

A winch used solely for warping, on which a rope may be wound under power but not stored.

A machinery device, which, with assist of the friction between reel and nets, lifts nets onto the board, shore, or ice surface from water.

A test applied to the first machine of anew design.

The maximum static pulling force produced through a vessel’s harbor pile towing test.

The maximum rope tension (in kilonewtons), measured at the drum commences to rotate in the direction of haul, the prime mover being set for maximum torque under automatic control and the rope being wound on the drum in a single layer.

A included angle between a rope and vertical plane of winch drum or warping end axial line, through the point at which rope leaves the drum or warping end

A prime mover which is suitable only for operating the deck machinery in a light loaded condition. Example: Reeling in of an untensioned rope, or topping an unloaded derrick.

The derrick boom heel having a pivot is hinged with the lower part of the mast, and the head of derrick boom, through steel wire, is connected with the mast top. The mast itself is fixed with the hull deck at mast bottom end, maintaining its stand state. ...

A winch with the ability to hold and haul a tensioned mooring rope and having a capacity for rope storage, controlled solely by hand.

The most essential characteristic parameters of a machine mechanical performance, indication with some important technical index.

A crane, with its boom structure consisting of several sections, each section being capable of telescoping along the boom’s axial direction and changing its boom length, and its boom being of luffing.