Technical TermsRSS

Technical Terms

A machine with a common prime mover which will provide independently the functions of either a windlass or a mooring winch (automatic or non-automatic).

A unit fitted with control levers, buttons, etc., as appropriate.

A vessel with permanently installed cranes designed principally for lifting operations.

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.

The minimum uniform speed (in meters per second) measured on the first layer that the winch can maintain under drum load.


Delta. D = signal letter and flag. Morse = ( - . - )Flag= Blue central horizontal stripe with smaller yellow strip above and under.When hoisted singly from a ship it means "I am maneuvering with difficulty. (Similar fog signal.)

A kind of winch, which is applied for deep sea-bed material sampling, and performing the benthonic organism trawl survey.

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. ...


Strengthening on the two top corners of shipping containers.

A special machinery device, which is applied on the dredger ship for digging, loosing soil, mashing, and sucking mud/rock. underwater

The maximum rope tension (in kilonewtons), measured at the drum exit when the winch is hoisting or hauling in at the nominal speed with the rope wound on the drum in a single layer.

Tunnel which accommodates pipelines and runs longitudinally alongh the centre line of a ship.

Those spaces in which the main navigating equipment, the ship's radio or the emergency source of power are located or where the fire recording or fire control equipment is centralized and also those spaces used for galleys, main pantries, stores (except i ...

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, ...


Echo- E = signal letter and flag. Morse = ( . )Flag= Blue over red.When hoisted singly from a ship it means "I am altering my course to starboard.

A device worn to reduce the level of noise heard by the wearer.

A notional continuous sound level which is calculated from the various A-we~ghteds ound levels and duration at these levels with an XdB exchange rate. The exchange rate is the number of dB decrease in noise level which would allow doubling of exposure tim ...

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.

Activated by means other than a directly connected prime mover.