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Eng ID | Term | Definition |
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5161 | submarine sound signal | See SOUND SIGNAL. |
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5162 | submarine spring | See SPRING. |
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5163 | submarine transit lane | A LANE where submarines may NAVIGATE under water or at the surface. |
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5164 | submarine valley | See VALLEY. |
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5165 | submarine volcano | A seabed volcano, submerged at the chart sounding datum, which may or may not be active. |
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5166 | submerged | (adj.). Under water; not showing above water. The opposite is UNCOVERED. |
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5167 | submerged rock | A rock covered at the chart sounding datum and considered to be potentially dangerous to navigation. |
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5168 | subordinate station | See STATION. |
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5169 | subpermanent magnetism | See MAGNETISM: PERMANENT. |
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5170 | subplan | An INSET on a SURVEY SHEET used to extend the survey coverage shown on the sheet, or to show small congested areas at enlarged SCALES. |
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5171 | sub-point | That point on the surface of the EARTH at which a particular CELESTIAL BODY is in the ZENITH at a specified TIME. Also called 'geographical ... more |
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5172 | sub-sea completion | See WELL: PRODUCTION. |
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5173 | subsidiary station | See STATION. |
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5174 | subsoil | All naturally occurring matter lying beneath the sea-bed or deep ocean floor. |
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5175 | subsolar point | The GEOGRAPHICAL POSITION of the SUN; that point on the EARTH at which the SUN is in the ZENITH at a specified TIME. |
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5176 | subsonic | (adj.). Designating or of SPEEDS that are less than that of SOUND. |
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5177 | substellar point | The GEOGRAPHICAL POSITION of a STAR; that point on the surface of the EARTH at which the STAR is in the ZENITH at a specified TIME. Also cal... more |
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5178 | substitute centre | A point which, because of its ease of identification on overlapping PHOTOGRAPHS, is used instead of the PRINCIPAL POINT as a RADIAL CENTRE... more |
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5179 | substitute map | See MAP. |
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5180 | subsurface current | See CURRENT. |