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	Eng ID	Term	Definition
	4541	satellite geodesy	See GEODESY.
	4542	satellite navigation	A positioning method using satellites.
	4543	satellite sounding	SOUNDING effected by means of instruments placed on board an ARTIFICIAL SATELLITE.
	4544	satellite station	See ECCENTRIC STATION.
	4545	saturation	The condition existing when the greatest possible amount of anything has been reached, as a magnetic substance which cannot be further magne... more The condition existing when the greatest possible amount of anything has been reached, as a magnetic substance which cannot be further magnetized, or an electronic AID TO NAVIGATION which is being used by all the craft it can handle. At given temperature and pressure, state of moist air whose mixing ratio is such that the moist air can co-exist in neutral EQUILIBRIUM with an associated condensed phase (liquid or solid) at the same temperature and pressure, the surface of separation being plane.
	4546	Savonius rotor current meter	A low-threshold current speed sensor composed of two cylindrical VANES disposed to form an S-shaped rotor responsive to a wide SPECTRUM of h... more A low-threshold current speed sensor composed of two cylindrical VANES disposed to form an S-shaped rotor responsive to a wide SPECTRUM of horizontal flow components.
	4547	SBES	See SINGLE BEAM ECHO SOUNDER
	4548	scale	A series of marks or GRADUATIONS at definite intervals. The ratio between the linear dimensions of a CHART, MAP, drawing, etc., and the actu... more A series of marks or GRADUATIONS at definite intervals. The ratio between the linear dimensions of a CHART, MAP, drawing, etc., and the actual dimensions represented. It may be called chart scale or map scale when applied to a CHART or a MAP. In PHOTOGRAMMETRY, the ratio of a distance on a PHOTOGRAPH to a corresponding distance on the ground. The scale of a PHOTOGRAPH varies from point to point because of DISPLACEMENTS caused by TILT and RELIEF; but it is usually taken as f/H where f is the PRINCIPAL DISTANCE of the CAMERA and H is the HEIGHT of the CAMERA above mean ground elevation.
	4549	scale: bar	A graduated line on a MAP, PLAN, PHOTOGRAPH, or MOSAIC, by means of which actual ground distances may be determined. Also called graphic s... more A graduated line on a MAP, PLAN, PHOTOGRAPH, or MOSAIC, by means of which actual ground distances may be determined. Also called graphic scale or linear scale.
	4550	scale: border	A SCALE drawn along the BORDER OF CHART.
	4551	scale: equivalent	The relationship which a small distance on a MAP, CHART or graphic bears to the corresponding distance on the EARTH, expressed as an equ... more The relationship which a small distance on a MAP, CHART or graphic bears to the corresponding distance on the EARTH, expressed as an equivalence.
	4552	scale: fractional	See SCALE: NATURAL.
	4553	scale: graphic	See SCALE: BAR.
	4554	scale: large	A SCALE involving a relatively small reduction in size. A large scale CHART is one covering a small area. The opposite is SMALL SCALE. See S... more A SCALE involving a relatively small reduction in size. A large scale CHART is one covering a small area. The opposite is SMALL SCALE. See SCALE: NATURAL.
	4555	scale: latitude	The subdivided east and west borders of a MERCATOR CHART into DEGREES and MINUTES. A variant of the BAR SCALE, since a MINUTE of LATITUD... more The subdivided east and west borders of a MERCATOR CHART into DEGREES and MINUTES. A variant of the BAR SCALE, since a MINUTE of LATITUDE is very nearly equal to a NAUTICAL MILE.
	4556	scale: linear	See SCALE: BAR.
	4557	scale: logarithmic	A SCALE graduated in the logarithms of uniformly-spaced consecutive numbers.
	4558	scale: log factor	In HYDROGRAPHIC SURVEYS, a proportional DIAGRAM constructed for the SCALE of the SURVEY sheet by means of which the LOG FACTOR can be qu... more In HYDROGRAPHIC SURVEYS, a proportional DIAGRAM constructed for the SCALE of the SURVEY sheet by means of which the LOG FACTOR can be quickly determined.
	4559	scale: natural	The ratio between the linear dimensions of a CHART, drawing, etc., and the actual linear dimensions represented, expressed as a proportion. ... more The ratio between the linear dimensions of a CHART, drawing, etc., and the actual linear dimensions represented, expressed as a proportion. Occasionally calledrepresentative fraction, fractional scaleor numerical scale.
	4560	scale: numerical	See SCALE: NATURAL.
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