A certificate issued to a shipowner by a government department in the case of a ship whose gross and net tonnages have been determined in accordance with the International Convention of Tonnage Measurement of Ships. The certificate states the gross and net tonnages together with details of the spaces attributed to each.

Related Terms

BUMPKIN

The spar projecting from stern of ship

TRAMP FREIGHTER

A cargo ship engaged in the tramp trade.

CORDAGE

Ropes in the rigging of a ship

WEATHER SIDE

The side of a ship exposed to the wind.

ABSOLUTE TEMPERATURE SCALE

A scale of temperature measurement in which zero degrees is absolute zero.

DOGWATCH

A short, evening period of watch duty on a ship

FARDAGE

A wood placed in bottom of ship to keep cargo dry

HYDROGRAPHY

The science that deals with the measurement and description of the physical features of the oceans, seas, lakes, rivers, and their adjoining coastal areas, with particular reference to their use for navigation.

HYPERBOLIC NAVIGATION

Radionavigation based on the measurement of the time differences in the reception of signals from several pairs of synchronized transmitters. For each pair of transmitters the isochrones are substantially hyperbolic. The combination of isochrones for two or more pairs of transmitters forms a hyperbolic lattice within which position can be determined according to the measured time differences

FORESAIL

The lowest sail set on the foremast of square-rigged ship

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