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Eng ID Term Definition
4801
sky-wave correction
The CORRECTION to be applied to the time difference reading of received SKY WAVES to convert it to an equivalent GROUND WAVE reading.
4802
slack tide
See SLACK WATER.
4803
slack water
The interval when the SPEED of the TIDAL CURRENT is very weak or zero; usually refers to the period of reversal between EBB and FLOOD curren... more
The interval when the SPEED of the TIDAL CURRENT is very weak or zero; usually refers to the period of reversal between EBB and FLOOD currents. Also called slack tide.
4804
slant distance
The straight-line distance from one point to another, as contrasted with GROUND DISTANCE. This expression is customarily used only when the ... more
The straight-line distance from one point to another, as contrasted with GROUND DISTANCE. This expression is customarily used only when the straight line connecting the two points lies above the surface of the EARTH. Also called slant range.
4805
slant range
See SLANT DISTANCE.
4806
slave
A SLAVE STATION.
4807
slave station
In a radio navigation system, the transmitting station controlled or triggered by the SIGNAL received from the MASTER STATION. Often shorten... more
In a radio navigation system, the transmitting station controlled or triggered by the SIGNAL received from the MASTER STATION. Often shortened to slave.
4808
slide: dark
A thin PLATE (usually metal or fibre, rigid or flexible) which, after insertion in a camera maga­zine, renders it light-tight.
4809
slide (or sliding) rule
A device used for performing rapid computa­tions involving multiplication, division, proportion, roots, and powers. It has a body like a rul... more
A device used for performing rapid computa­tions involving multiplication, division, proportion, roots, and powers. It has a body like a ruler, but with a sliding section. Both body and sli­ding section are graduated with numbers according to LOGARITHMIC SCALES.
4810
slime
Soft, fine, oozy MUD or other substance of similar consistency.
4811
slip
See DOCK.
4812
slipway
The prepared and usually reinforced inclined surface on which keel- and bilge-blocks are laid for supporting a vessel under construction.
4813
slope
The deepening SEAFLOOR out from the SHELF EDGE to the upper limit of the CONTINENTAL RISE, or the point where there is a general decrease in... more
The deepening SEAFLOOR out from the SHELF EDGE to the upper limit of the CONTINENTAL RISE, or the point where there is a general decrease in steepness.
4814
slope and height factor
In the measurement of di­stances with Tellurometer, a factor to be reckoned when reducing distances to the SPHEROID. It takes into account t... more
In the measurement of di­stances with Tellurometer, a factor to be reckoned when reducing distances to the SPHEROID. It takes into account the mean HEIGHT of the stations (master and remote units) and the SLOPE of the line.
4815
slope angle
The angle between a SLOPE and the hori­zontal.
4816
slope correction (tape)
See TAPE: GRADE CORRECTION.
4817
slotted-template triangulation
In PHOTOGRAMMETRY, a graphical RADIAL TRIAN­GULA­TION using slotted TEMPLA­TES.
4818
slough
A minor marshland or tidal WATERWAY which usually connects other tidal areas; often more or less equivalent to a BAYOU. Quagmire, SWAMP, mir... more
A minor marshland or tidal WATERWAY which usually connects other tidal areas; often more or less equivalent to a BAYOU. Quagmire, SWAMP, miry place.
4819
sludge
Spongy whitish ice lumps, a few centimetres across; they consist of SLUSH, of snow slush and some­times of spongy ice lumps formed on the BO... more
Spongy whitish ice lumps, a few centimetres across; they consist of SLUSH, of snow slush and some­times of spongy ice lumps formed on the BOTTOM of the SEA and emerging on the surface.
4820
sluice
Sliding gate or other contrivance for changing the level of a body of water by controlling FLOW into or out of it.