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Eng ID | Term | Definition |
---|---|---|---|
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2841 | light (or lighted) beacon | See BEACON. |
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2842 | light beam | A group of PENCILS of light, as those originating at the many points of an illuminated surface. A BEAM of parallel LIGHT RAYS is a special c... more |
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2843 | light (or lighted) buoy | See BUOY. |
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2844 | light characteristics | See CHARACTERISTICS OF LIGHT. |
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2845 | lighted sound buoy | See BUOY. |
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2846 | light float | A boat-like structure used instead of a light buoy in waters where strong streams or currents are experienced, or when a greater elevation t... more |
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2847 | lighthouse | A distinctive structure on or off a COAST exhibiting a major LIGHT designed to serve as an AID TO NAVIGATION. |
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2848 | light list | See LIST OF LIGHTS. |
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2849 | lightning | Luminous manifestations accompanying a sudden electrical discharge which takes place from or inside a CLOUD or, less often, from high struc... more |
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2850 | light pencil | A bundle of LIGHT RAYS originating at, or directed to, a single point. |
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2851 | light ray | The geometrical concept of a single element of light propagated in a straight line and of infinitesimal cross-section; used in analytically... more |
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2852 | light sector | A sector in which a navigational LIGHT is visible. See ARC OF VISIBILITY. |
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2853 | lightship | A distinctively marked vessel anchored or moored at a charted point, to serve as an AID TO NAVIGATION. By night it displays a characteristic... more |
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2854 | light vessel | See LIGHTSHIP. |
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2855 | light-year | A unit of length equal to the distance light travels in one YEAR. This unit is used as a measure of stellar distance. |
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2856 | Lighter Aboard Ship (LASH) | A cargo carrying system using specially built ships and lighters. Cargoes are loaded into LASH lighters which are towed to a LASH ship where... more |
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2857 | limb | The graduated curved part of an instrument for measuring angles, as that part of a MARINE SEXTANT carrying the altitude scale, or arc. The c... more |
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2858 | limestone | A ROCK which consists chiefly of calcium carbonate. |
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2859 | limnology | The scientific study of the biological, chemical, geographical, and physical features of fresh waters, especially of LAKES and PONDS. |
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2860 | linear light | See LIGHT. |