WATER CUT

The point at which the cargo and water in a tank interface as determined usually by a water finding or detection paste spread on a sounding tape lowered into the tank. The paste changes color when it comes in contact with water. This is then used to determine the amount of water in the tank verses the cargo, or the 'water cut'.

water_cut contact spread cargo sounding tank detection sounding_tape water point

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BULK CARGO

Cargo such as oil, coal, ore, woodchips, etc. not shipped in bags or containers

bulk_cargo cargo oil coal ore woodchips

TRAMP FREIGHTER

A cargo ship engaged in the tramp trade.

tramp_freighter tramp_trade cargo ship cargo_ship

CORROSION INHIBITOR

Additive for protecting lubricated metal surfaces against chemical attack by water or other contaminants. There are several types of corrosion inhibitors. Polar compounds wet the metal surface preferentially, protecting it with a film of oil. Other compounds may absorb water by incorporating it in a water-in-oil emulsion so that only the oil touches the metal surface. Another type of corrosion inhibitor combines chemically with the metal to present a non- reactive surface.

corrosion_inhibitor additive chemical_attack polar_compound water emulsion oil surface corrosion chemical metal film polar

CAPACITY PLAN

A plan outlining the spaces available for fuel, cargo, ballast, fresh water, etc, with guides on weight and volume for spaces at various drafts and displacements

capacity capacity_pan plan fuel cargo ballast weight volume draft displacement

DEMULSIBILITY

The ability of a fluid that is insoluble in water to separate from water with which it may be mixed in the form of an emulsion.

demulsibility fluid insoluble emulsion water form

COMBI

Vessel designed for a combination of passengers, and different types of cargo.

combi vessel combination passanger cargo

DERRICK

A device for hoisting and lowering heavy weights, cargo, stores, etc

derrick device hoisting lowering heavy weight cargo store

HALF-TIDE BASIN

A lock of very large size and usually of irregular shape, the gates of which are kept open for several hours after high tide so that vessels may enter as long as there is sufficient depth over the sill. Vessels remain in the half-tide basin until the ensuing flood tide before they may pass through the gate to the inner harbor. If entry to the inner harbor is required before this time, water must be admitted to the half-tide basin from some external source.

half-tide_basin water depth harbor tide basin entry flood high inner_harbor lock open

GROUND LOG

A device for determining the course and speed over the ground in shallow water consisting of a lead or weight attached to a line. The lead is thrown overboard and allowed to rest on the bottom. The course over ground is indicated by the direction the line tends and the speed by the amount of line paid out in a unit of time.

ground_log device water unit weight line overboard course speed ground lead course_over_ground direction rest shallow

GULLY

1. A small ravine, especially one cut by running water, but through which water flows only after a rain. 2. On the sea floor, a small valley-like feature

gully water cut

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