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Eng ID | Term | Definition |
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4921 | spatial | (adj.). Pertaining to or limited by space. |
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4922 | special mark | In the IALA Maritime Buoyage System, a special mark indicates an area or FEATURE referred to in NAUTICAL documents; it is not primarily inte... more |
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4923 | special purpose map | See MAP. |
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4924 | specific gravity | The ratio of the density of a substance at a given temperature and the density of some other substance used as a STANDARD. For liquids and ... more |
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4925 | spectroscope | An optical instrument for forming SPECTRA. It is very useful in studying the characteristics of CELESTIAL BODIES. |
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4926 | spectrum | (pl. spectra). A series of IMAGES formed when a BEAM of RADIANT ENERGY is separated into its various WAVE LENGTH components, as when a BEAM ... more |
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4927 | specular reflection | The type of reflection, in optics or microwave theory, characteristic of a highly polished plane surface from which all rays are reflected ... more |
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4928 | speed | Rate of motion. The terms speed and VELOCITY are often used interchangeably, but speed is a scalar, having magnitude only, while VELOCITY i... more |
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4929 | speed: angular | Change of direction per unit time. Also called angular rate or angular velocity. |
|
4930 | speed: ground | See GROUND SPEED. |
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4931 | speed: linear | Rate of motion in a straight line. |
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4932 | speed: relative | See RELATIVE MOTION. |
|
4933 | speed line | A LINE OF POSITION approximately perpendicular to the COURSE. |
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4934 | speed made good | The actual velocity of the ship along a course measured in relation to the ocean bottom or to fixed objects ashore. |
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4935 | speed of lens | See APERTURE: RELATIVE. |
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4936 | speed of propagation | The speed with which waves of energy travel through or along a medium other than a specially constructed path. |
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4937 | speed of relative movement | See RELATIVE MOTION. |
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4938 | speed of sound | The SPEED OF PROPAGATION of sound waves . |
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4939 | speedometer | An ODOMETER recording the SPEED of a craft by a process of differentiation. |
|
4940 | speed scale | See SCALE. |