The total internal capacity of a ship measured in register tons from the top of the floors to the tonnage deck. This includes all spaces above the floors. The tonnage deck is the upper deck in all ships with less than three decks, and the second deck from below in all other ships. Only complete decks are counted.


Related Terms

ORTHOTROPIC DECK

A bridge deck constructed typically of flat steel plate and longitudinal and transverse ribs; functions in carrying traffic and acting as top flanges of floor beams.

FREEBOARD DECK

Deck to which freeboard is measured

TWEEN DECK

The space between any two adjacent decks

FLUSH DECK

The upper deck of a vessel that extends unbroken from stem to stern.

BEAR

Large squared off stone used with sand for scraping clean wooden decks.

BELOW DECKS

In or into any of the spaces below the main deck of a vessel.

FLIGHT DECK

The flat deck used for the launch and recovery of aircraft.

GUNWALE

The upper edge of the hull. The top timber on the rail round the outer edge of the deck.

POOP DECK

The high deck on the aft superstructure of a ship.

ORLOP

The lowest deck in a ship having four or more decks

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