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Eng ID | Term | Definition |
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5321 | tach stave (levelling staff) | A staff with a length of about 2m with subdivisions. It is used in combination with a levelling instrument or theodolite. |
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5322 | taffrail | The after rail at the stern of a vessel. |
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5323 | taffrail log | See LOG. |
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5324 | tagline | A line, either marked at equal intervals or run over a registered sheave, used in LARGE-SCALE SURVEYS to take equally spaced SOUNDINGS at pr... more |
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5325 | tagline survey | See SURVEY. |
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5326 | tail wind | WIND which blows in the same direction as that in which an object is moving, with respect to the EARTH's surface. |
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5327 | talus | A SLOPE. A sloping mass of DETRITUS lying at the base of a CLIFF or the like, and consisting of material which has fallen from its face; a... more |
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5328 | talweg (or thalweg) | The line joining the lowest points of a VALLEY throughout its length. Sometimes called valley line. |
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5329 | tandem control | In HYDROGRAPHIC SURVEY, a system of obtaining two or more adjacent SOUNDING LINES run simultaneously and controlled by one ship, the other... more |
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5330 | tank | A fixed structure for storing liquids. |
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5331 | tangent screw | A slow motion screw of a surveying instrument or SEXTANT. |
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5332 | tape | In SURVEYING, a ribbon of steel, INVAR, or other suitable material on which GRADUATIONS are placed for the measurement of lengths or distanc... more |
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5333 | tape: alignment correction | A CORRECTION applied to the measured length of a line to allow for the TAPE not being held exactly in a vertical plane containing the line. |
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5334 | tape: base | See BASE TAPE (or WIRE). |
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5335 | tape: catenary correction | See TAPE: SAG CORRECTION. |
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5336 | tape: grade correction | A CORRECTION applied to a distance measured on a SLOPE to reduce it to a horizontal distance between the vertical lines through its end ... more |
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5337 | tape: invar | Any survey TAPE made of INVAR. |
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5338 | tape: length correction | The difference between the nominal length of a TAPE and its effective length under conditions of STANDARDIZATION. |
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5339 | tape: reference | See REFERENCE TAPE. |
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5340 | tape: sag correction | The difference between the effective length of a TAPE (or part of a TAPE) when supported continuously throughout its length and when sup... more |