Dogwatch - A way the sailors changed places. Every 4 bells they switch places.
Category: - Maritime

Dory - A small rowing vessel with a narrow, flat bottom and high sides curving outward.
Category: - Maritime

DOT - Department of Transportation, USA
Category: - Acronym

Dot Map - A map type that uses a dot symbol to show the presence of a feature, relying on a visual scatter to show spatial pattern. Most often used where point features are the GIS data, but dots can be scattered at random throughout areas.
Category: - GIS

Double Bottom - General term for all watertight spaces contained between the outside bottom plating, the tank top and the margin plate. The double bottoms are sub-divided into a number of separate tanks which may contain boiler feed water, drinking water, fuel oil, ballast, etc.
Category: - Maritime

Double Bottom - Compartments at bottom of ship between inner and outer bottoms, used for ballast tanks, water, fuel, oil, etc.
Category: - Maritime

Doubling Plate - A plate fitted outside or inside of another to give extra strength or stiffness.
Category: - Maritime

Draft - Small gusty current associated with the abrupt vertical movement of air; for example, updrafts and downdrafts.
Category: - Weather

Draft - The depth of a ship in the water. The vertical distance between the waterline and the keel, in the U.S. expressed in feet, elsewhere in meters.
Category: - Maritime

Drizzle - Precipitatioin from stratus clouds consisting of numerous minute, fine water droplets which appear to float. In drizzle, the droplets are much smaller than in rain.
Category: - Weather