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Eng ID Term Definition
701
centripetal force
The force directed towards the centre of curvature which constrains a body to move in a curved PATH. Equal and opposite to the CENTRIFUGAL F... more
The force directed towards the centre of curvature which constrains a body to move in a curved PATH. Equal and opposite to the CENTRIFUGAL FORCE.
702
centrosphere
The central CORE of the EARTH, composed of dense material, and making up most of its mass. Also called barysphere or CORE.
703
cesium clock
See CLOCK: CESIUM.
704
cesium magnetometer
See MAGNETOMETER.
705
C-factor
(U.S.A.). In PHOTOGRAMMETRY, an empirical value which expresses the vertical measuring capability of a given stereoscopic system; generally ... more
(U.S.A.). In PHOTOGRAMMETRY, an empirical value which expresses the vertical measuring capability of a given stereoscopic system; generally defined as the ratio of the flight height to the smallest CONTOUR INTERVAL accurately plottable. The C-factor is not a fixed constant but varies over a considerable RANGE, according to the elements and conditions of the photogrammetric system. In planning for AERIAL PHOTOGRAPHY, the C-factor is used to determine the flight height required for a specified CONTOUR INTERVAL, CAMERA, and instrument system.
706
CGS system
See CENTIMETRE-GRAM-SECOND (CGS) SYSTEM.
707
chain
A group of TRANSMITTERS broadcasting the same programme. In ELECTRONIC NAVIGATION, several related transmitting stations in geographic prox... more
A group of TRANSMITTERS broadcasting the same programme. In ELECTRONIC NAVIGATION, several related transmitting stations in geographic proximity (Decca chain, Loran chain, etc.). In DIGITAL data, a sequence of one or more line segments.
708
chaining
See TAPING.
709
chain adjustment
A mathematical adjustment of a whole series of figures, for example, a CHAIN OF TRIANGULATION.
710
chain of triangulation
See TRIANGULATION: ARC OF.
711
challenger
See INTERROGATOR.
712
change of tide
A reversal of the direction of motion (rising or falling) of a TIDE. The expression is also sometimes applied to a reversal in the SET of a ... more
A reversal of the direction of motion (rising or falling) of a TIDE. The expression is also sometimes applied to a reversal in the SET of a TIDAL CURRENT. Also called turn of the tide. See also STAND OF TIDE.
713
channel
That part of a body of water (sometimes dredged) deep enough for NAVIGATION through an area otherwise not navigable. It is usually marked by... more
That part of a body of water (sometimes dredged) deep enough for NAVIGATION through an area otherwise not navigable. It is usually marked by a single or double line of BUOYS and sometimes by RANGES. The deepest part of a STREAM, BAY or STRAIT through which the main CURRENT flows. See also STRAIT.
714
channel: frequency
A continuous portion of the frequency spectrum appropriate for a transmission utilizing a specified class of emission.
715
channel: sea
A long, narrow, U-shaped or V-shaped shallow depression of the SEAFLOOR usually occurring on a gently sloping PLAIN or FAN. A continuously s... more
A long, narrow, U-shaped or V-shaped shallow depression of the SEAFLOOR usually occurring on a gently sloping PLAIN or FAN. A continuously sloping, elongated DEPRESSION commonly found in CONES or ABYSSAL PLAINS and customarily bordered by levees on one or both sides.
716
character
As pertains to typography, a graphic symbol such as a letter of the alphabet, figure, punctuation mark or sign employed in recording languag... more
As pertains to typography, a graphic symbol such as a letter of the alphabet, figure, punctuation mark or sign employed in recording language. In data processing, an element of a CODE set used for representing information.
717
characteristics of light
All particularities of a LIGHT, such as colour, PERIOD, group number, VISIBILITY, HEIGHT above SEA LEVEL and CHARACTER. Also calledlight cha... more
All particularities of a LIGHT, such as colour, PERIOD, group number, VISIBILITY, HEIGHT above SEA LEVEL and CHARACTER. Also calledlight characteristics. See also GROUP.
718
character of light
The distinct character, such as fixed, flashing, or occulting, which is given to each LIGHT to avoid confusion with neighbouring ones.
719
character (or characteristics) of the bottom
See BOTTOM: NATURE OF.
720
chart
A special-purpose MAP generally designed for NAVIGATION or other particular purposes. See CHART: NAUTICAL, PAPER.