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| There are 109 entries in the glossary. | |
| Pages: << < 1 2 3 4 5 6 7 8 > >> | |
| Term | Definition |
| Deck Prism | A prism inserted into the deck which provides light down below. |
| Deck Stepped | A mast that is stepped (placed) on the deck of a boat rather than through the boat and keel stepped. The mast of a deck stepped boat is usually easier to raise and lower and are usually intended for lighter conditions than keel stepped boats. |
| Deckhand | Seaman who works on the deck of a ship and remains in the wheelhouse attending to the orders of the duty officers during navigation and maneuvering. He also comes under the direct orders of the bosun. |
| Deckhead | The underside of the deck, viewed from below the ceiling. |
| Declination | The angular distance North or South of the equator, measured from the center of the earth. It thus corresponds to latitude on the earths surface. |
| Deep V | Refers to the shape of a boat's (usually power boat) hull. A deep V hull is usually good at cutting through rough waves at high speeds. |
| Deep Waterline | The line to which a vessel is submerged with a full cargo on board. |
| Departure | (1) The last position on a chart, when a ship is leaving the land. (2) The number of nautical miles that one place is eastwards or westwards of another. |
| Depression | An area of low barometric pressure. The wind circulates clockwise in the Southern Hemisphere and counter-clockwise in the Northern Hemisphere. Generally these are bad weather systems. |
| Depth Sounder | An instrument that uses sound waves to measure the distance to the bottom. |
| Derelict | Any abandoned vessel. |
| Derrick | A hoisting apparatus consisting of a block and tackle rigged at the end of a beam. |