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- Deadweight; weight in metric tons of cargo, supplies,freshwater fuel, passengers, and crew who transported the ship to load waterline summer.
- Deck stringer plate; late-lane deck strength or the main deck of the ship.
- Deck; surface flat or nearly flat over the top from the space ship.
- Derrick mast; onboard pole used for the purposes of loading and unloading.
- Displacement; in the amount of water displaced by the tonship will float.
- Dock; facility with all equipment and supplies, where hull can sit on it in a dry state.
- Double bottom; on the basis of ship room located at between the plates in the skin and the base, which is used for water countered, fuel, fresh water, and others – others. Single bottom; basic boat that has no base in that if a leak in the base plate, water be directly entered into the ship.
- Draft draft; vertical distance from the lowest point of hull until surface water.