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All| There are 2224 entries in the glossary. |
| Pages: << < 1 2 3 4 5 6 7 8 9 > >> |
| Aloft | Above the deck, usually overhead on the mast or in the rigging. |
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| Alongside | Close beside a ship, wharf or jetty. |
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| Aloof | Old expression meaning to "keep your luff", or sail as close to the wind as possible. |
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| Alow | Down or downwards; as in "Lay alow!"; opposite of Aloft. |
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| Altazimuth | Instrument for establishing the altitude and azimuth of stars and planets. |
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| Altitude | The angle a celestial body makes with the horizon. |
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| Amain | An old maritime expression meaning "immediately", as "let go amain" (drop the anchor at once!). |
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| Amas | The outboard hulls of a trimaran. |
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| Amidships | In or toward the part of a boat or ship midway between the bow and the stern; also midway between port and starboard sides; toward the middle of the ship or boat. |
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| Ammeter | An instrument for measuring electrical current in amperes. |
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| Amplitude | (1) In navigation, the angle between the point at which the sun rises and sets and the true east and west points of the horizon. (2) Wave height. |
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| Anchor | (1) A heavy metal object, fastened to a chain or line, to hold a vessel in position, partly because of its weight, but chiefly because the designed shape digs into the bottom. (2) The act of using an anchor. |
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| Anchor Ball | A black ball visible in all directions, displayed in the forward part of a vessel to indicate that the vessel is anchored. |
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| Anchor Bed | Chocks which hold and anchor in place either in a locker or on deck. |
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| Anchor Bend | A type of knot used to fasten an anchor to its line. |
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