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	Eng ID	Term	Definition
	2681	large scale survey	See SURVEY.
	2682	LASH	See LIGHTER ABOARD SHIP.
	2683	laser	Light amplification by stimulated emission of RADIATION. A device that produces an intense BEAM of monochromatic, spatially coherent light.
	2684	last quarter	See PHASES OF THE MOON.
	2685	lateral buoy	See LATERAL MARK
	2686	lateral mark	In the IALA Maritime Buoyage System a NAVIGATION MARK used to indicate the PORT or STARBOARD side of the ROUTE to be followed. They are gen... more In the IALA Maritime Buoyage System a NAVIGATION MARK used to indicate the PORT or STARBOARD side of the ROUTE to be followed. They are generally used for well defined CHANNELs and are used in conjunction with a conventional direction of BUOYAGE. See also LATERAL SYSTEM.
	2687	lateral system	A buoyage system generally used for well defined CHANNELS; buoyage marks indicate the POSITION of dangers in relation to the route to be fol... more A buoyage system generally used for well defined CHANNELS; buoyage marks indicate the POSITION of dangers in relation to the route to be followed by mariners in their vicinity.
	2688	latitude	ANGULAR DISTANCE from a PRIMARY GREAT CIRCLE or plane. One of the COORDINATES used to describe a POSITION, the other being LONGITUDE.
	2689	latitude: astronomical	ANGULAR DISTANCE between the DIRECTION OF GRAVITY and the plane of the EQUATOR. Astronomical latitude is the LATITUDE which results directly... more ANGULAR DISTANCE between the DIRECTION OF GRAVITY and the plane of the EQUATOR. Astronomical latitude is the LATITUDE which results directly from OBSERVATIONS on CELESTIAL BODIES, uncorrected for DEFLECTION OF THE VERTICAL.
	2690	latitude: celestial	ANGULAR DISTANCE north or south of the ECLIPTIC; the arc of a CIRCLE OF LATITUDE between the ECLIPTIC and a point on the CELESTIAL SPHERE, m... more ANGULAR DISTANCE north or south of the ECLIPTIC; the arc of a CIRCLE OF LATITUDE between the ECLIPTIC and a point on the CELESTIAL SPHERE, measured northward or southward from the ECLIPTIC through 90°, and labelled N or S to indicate the direction of measurement. Also called ecliptic latitude.
	2691	latitude: geocentric	The angle at the centre of the EARTH between the plane of the EQUATOR and a line to a point on the surface of the EARTH.
	2692	latitude: geodetic	The angle which the NORMAL at a point on the SPHEROID makes with the plane of the GEODETIC EQUATOR.
	2693	latitude: geographic(al)	A general term, applying alike to ASTRONOMICAL and GEODETIC LATITUDES.
	2694	latitude: geometric	See LATITUDE: PARAMETRIC.
	2695	latitude: isometric	An auxiliary LATITUDE used in the conformal mapping of the SPHEROID on a sphere.
	2696	latitude: magnetic	The angle whose tangent is one half the tangent of the magnetic inclination or DIP.
	2697	latitude: parametric	The angle at the centre of a sphere which is tangent to the SPHEROID along the GEODETIC EQUATOR, between the plane of the EQUATOR and the ra... more The angle at the centre of a sphere which is tangent to the SPHEROID along the GEODETIC EQUATOR, between the plane of the EQUATOR and the radius to the point intersected on the sphere by a straight line perpendicular to the plane of the EQUATOR and passing through the point on the SPHEROID whose parametric latitude is defined. Parametric latitude is an auxiliary LATITUDE used in problems of GEODESY and CARTOGRAPHY. Also calledreduced latitude, geometric latitudeor eccentric angle.
	2698	latitude: reduced	See LATITUDE: PARAMETRIC.
	2699	latitude: terrestrial	ANGULAR DISTANCE from the EQUATOR, measured northward or southward through 90° and labelled N or S to indicate the direction of measure... more ANGULAR DISTANCE from the EQUATOR, measured northward or southward through 90° and labelled N or S to indicate the direction of measurement.
	2700	latitude factor	The change in LATITUDE along a CELESTIAL LINE OF POSITION per 1' change in LONGITUDE.
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