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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 measure­men... 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.