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Use the box below to search for a specific Term |
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| There are 109 entries in the glossary. |
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| Dacron | A synthetic polyester material. |
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| Daggerboard | Similar to a centerboard, except that it is raised and lowered vertically in a trunk rather than pivoted. Like a keel, daggerboards are used to reduce leeway by preventing a sailboat being pushed sideways by the wind. |
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| Danforth Anchor | A brand of lightweight anchor. It has pivoting flukes that dig into the ground as tension is placed on the anchor. |
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| Davit(s) | A small crane that projects over the side of the boat to raise or lower objects (such as smaller boats) from or to the water. |
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| Davy Jones | Nautical slang for the spirit of the sea, usually in the form of a sea devil. Davy Jones's Locker is the bottom of the sea, the final resting place of sunken ships, articles lost or thrown overboard, and of men buried at sea. |
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| Daybeacon | A fixed navigation aid structure, visible during the day, used in shallow waters upon which is placed one or more daymarks. |
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| Daymark | A signboard attached to a daybeacon to convey navigational information presenting one of several standard shapes (square, triangle, rectangle) and colors (red, green, orange, yellow, or black). Daymarks usually have reflective material indicating the shape. |
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| Daysailor | A small boat intended to be used only for short sails or racing. |
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| Dayshape | Black diamond, ball, and cone shapes hoisted on vessels during the day to indicate restricted movement, ability, or type. For example three balls means aground. |
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| Dead Ahead | A position directly in front of the vessel. |
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| Dead Astern | A position directly aft or behind the vessel. |
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| Dead Horse | Seaman's term for the period of work on board ship for which he has been paid in advance when signing on. |
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| Dead Marine | An empty wine bottle after its contents have been drunk. |
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| Dead on End | Said of wind when exactly ahead; and of another vessel when her fore and aft line coincides with observer's line of sight. |
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| Dead Reckoning | The process of plotting a theoretical position or future position based on advancing from a known position using speed, time, and course, without aid of objects on land, of sights, etc. Term comes from deduced reckoning, abbreviated first to "ded reckoning". |
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