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.
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BUMPKIN
The spar projecting from stern of ship
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TRAMP FREIGHTER
A cargo ship engaged in the tramp trade.
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CORDAGE
Ropes in the rigging of a ship
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WEATHER SIDE
The side of a ship exposed to the wind.
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ABSOLUTE TEMPERATURE SCALE
A scale of temperature measurement in which zero degrees is absolute zero.
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DOGWATCH
A short, evening period of watch duty on a ship
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FARDAGE
A wood placed in bottom of ship to keep cargo dry
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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.
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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
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FORESAIL
The lowest sail set on the foremast of square-rigged ship
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