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	Eng ID	Term	Definition
	2641	klaxon	A small power FOG SIGNAL sometimes operated by hand.
	2642	knoll	A relatively small isolated ELEVATION of a rounded shape. On the SEAFLOOR, an ELEVATION somewhat smaller than a SEAMOUNT and of rounded prof... more A relatively small isolated ELEVATION of a rounded shape. On the SEAFLOOR, an ELEVATION somewhat smaller than a SEAMOUNT and of rounded profile characteristically isolated or as a cluster. Also called HILL.
	2643	knot	A division of the LOG LINE, by which the ship's SPEED is measured.
	2644	kymatology	The science of WAVES and wave motion.
	2645	labour (or labor)	(v.i.). To pitch and roll heavily under conditions which subject the ship to unusually heavy stresses caused by confused or turbulent seas o... more (v.i.). To pitch and roll heavily under conditions which subject the ship to unusually heavy stresses caused by confused or turbulent seas or unstable stowage or cargo.
	2646	lag	The delay between change of condition and the indication of the change on an instrument. Delay in human reaction. The amount one cyclic moti... more The delay between change of condition and the indication of the change on an instrument. Delay in human reaction. The amount one cyclic motion is behind another, expressed in DEGREES. The opposite is LEAD.
	2647	lagging of the tide(s)	The periodic retardation in the time of occurrence of high and low water due to changes in the relative positions of the moon and the sun.
	2648	lagan	See JETTISON.
	2649	lagging of the tide(s)	The retardation in the TIME of occurrence of HIGH and LOW WATER due to changes in the relative positions of the MOON and the SUN. The oppos... more The retardation in the TIME of occurrence of HIGH and LOW WATER due to changes in the relative positions of the MOON and the SUN. The opposite effect is called PRIMING OF THE TIDE(S). See also DAILY RETARDATION.
	2650	lagoon	An enclosed area of salt or brackish water separated from the OPEN SEA by some more or less effective, but not complete, obstacle such as l... more An enclosed area of salt or brackish water separated from the OPEN SEA by some more or less effective, but not complete, obstacle such as low sand bank. The name most commonly used for the area of water enclosed by a BARRIER REEF or ATOLL.
	2651	Lagrangian current observations	The method for observing ocean currents by tracking the movement of drifting floats, buoys, tracers etc. The rate and direction of moveme... more The method for observing ocean currents by tracking the movement of drifting floats, buoys, tracers etc. The rate and direction of movement of a particular sample of water is measured. This is the opposite to EULARIAN CURRENT OBSERVATIONS where the movement of water past a fixed point is measured by a current meter.
	2652	lake	A large body of water entirely surrounded by LAND.
	2653	lake breeze	See SEA BREEZE.
	2654	lake ice	ICE formed in LAKES.
	2655	Lambert conformal conic projection	See PROJECTION.
	2656	laminar flow	LOW in which the fluid moves smoothly along STREAMLINES which are arranged in parallel LAYERS or sheets; opposite of TURBULENT FLOW. Also ca... more LOW in which the fluid moves smoothly along STREAMLINES which are arranged in parallel LAYERS or sheets; opposite of TURBULENT FLOW. Also called streamline flow.
	2657	lamp: signal	A compact, portable battery-operated electric lamp used as a TARGET for OBSERVATIONS or SURVEYS of high PRECISION. The parabolical reflector... more A compact, portable battery-operated electric lamp used as a TARGET for OBSERVATIONS or SURVEYS of high PRECISION. The parabolical reflector is mounted in a special case so as to facilitate pointing and adjusting.
	2658	land	The solid portion of the EARTH's surface, as opposed to SEA, water. A part of the EARTH's surface marked off by natural or political BOUNDAR... more The solid portion of the EARTH's surface, as opposed to SEA, water. A part of the EARTH's surface marked off by natural or political BOUNDARIES.
	2659	land breeze	WIND of coastal regions blowing at night from the LAND towards a large water surface as a result of nocturnal cooling of the land surface.
	2660	landfall	The first sighting of LAND when approached from seaward. By extension, the term is sometimes used to refer to the first contact with LAND by... more The first sighting of LAND when approached from seaward. By extension, the term is sometimes used to refer to the first contact with LAND by any means, as by RADAR.
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