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Eng ID | Term | Definition |
---|---|---|---|
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2441 | index mirror | The MIRROR attached to the INDEX ARM of a MARINE SEXTANT. Also called index glass. |
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2442 | index of refraction | See REFRACTION: INDEX OF. |
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2443 | index shade | On a SEXTANT, one of the pivoting coloured glasses which can be swung before the INDEX MIRROR for reducing the glare of the SUN. |
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2444 | Indian spring low water | An arbitrary TIDAL DATUM approximating the LEVEL of the mean of the LOWER LOW WATER at SPRING TIDES. It was first used in waters surrounding... more |
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2445 | Indian tide plane | See INDIAN SPRING LOW WATER. |
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2446 | indicator | That part of electronic equipment in which the DATA obtained by the RECEIVER is presented for visual OBSERVATION. This is usually in the for... more |
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2447 | indirect levelling | See LEVELLING. |
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2448 | indirect wave | See WAVE. |
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2449 | induced magnetism | See MAGNETISM. |
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2450 | inequality | A systematic departure from the mean value of a quantity. See ANNUAL INEQUALITY, DIURNAL INEQUALITY, LUNAR INEQUALITY, PARALLAX INEQUALITY,... more |
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2451 | inertia: gyroscopic | See GYROSCOPIC INERTIA. |
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2452 | inertial navigation | See NAVIGATION. |
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2453 | inferior conjunction | See CONJUNCTION. |
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2454 | inferior mirage | See MIRAGE. |
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2455 | inferior planet (s) | See PLANET (S): INFERIOR. |
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2456 | inferior transit | See MERIDIAN TRANSIT. |
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2457 | infrared | (adj.). Having a FREQUENCY immediately beyond the red end of the visible SPECTRUM said of RAYS of longer WAVE LENGTH than visible light, but... more |
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2458 | infrasonic | (adj.). Having a FREQUENCY below the audible RANGE. |
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2459 | ingoing stream | See FLOOD STREAM. |
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2460 | initial great circle course | See COURSE: GREAT CIRCLE. |