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Eng ID | Term | Definition |
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1341 | deviation: magnetic | The angle between the COMPASS NEEDLE and the MAGNETIC MERIDIAN, expressed in degrees east or west of MAGNETIC MERIDIAN. Also called deviatio... more |
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1342 | deviation: quadrantal | DEVIATION which changes its sign (E or W) approximately each 90° change of HEADING. It is caused by INDUCED MAGNETISM in horizontal SOFT IRO... more |
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1343 | deviation: residual | DEVIATION of a MAGNETIC COMPASS after COMPENSATION. |
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1344 | deviation: semicircular | DEVIATION which changes sign (E or W) approximately each 180° change of HEADING. |
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1345 | deviation: standard | See ERROR: STANDARD. |
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1346 | deviation of the vertical | See DEFLECTION OF THE VERTICAL. |
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1347 | deviation table | A TABLE of the DEVIATION of a MAGNETIC COMPASS on various HEADINGS, magnetic or compass. |
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1348 | dew | Deposit of water drops on objects at or near the GROUND, produced by the condensation of water vapour from the surrounding clear air. |
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1349 | dew-point | The temperature to which air must be cooled at constant pressure and constant water vapour content to reach saturation. |
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1350 | DGPS | See DIFFRERENTIAL GPS |
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1351 | diagenesis | The chemical and physical changes that SEDIMENTS undergo after their deposition, by LITHIFICATION. |
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1352 | diagram | A graphic representation of certain DATA. |
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1353 | dial | The face of a WATCH or CLOCK. The clockwise face of an instrument for indicating, as by a moving pointer, the amount of something; face of a... more |
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1354 | diaphone | A device operated by compressed air for producing a distinctive FOG SIGNAL. |
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1355 | diaphragm | In a TELESCOPE, a thin glass disk on which etched lines forming a RETICLE are placed. See also RETICLE, and APERTURE STOP. |
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1356 | diapositive | A positive PHOTOGRAPH on a transparent medium. One which has a right reading image when viewed through the base support. |
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1357 | difference: tidal | See TIDAL DIFFERENCE. |
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1358 | difference of latitude | The ANGULAR DISTANCE between the PARALLELS of two places measured on a MERIDIAN. |
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1359 | difference of longitude | The angle at the POLE or intercepted arc of EQUATOR between the MERIDIANS of two places. |
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1360 | differential GPS | Differential GPS is implemented by placing a GPS monitor receiver at a precisely known location. Instead of computing a navigation fix, the ... more |