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	Eng ID	Term	Definition
	2701	latitude line	A LINE OF POSITION extending in a generally east-west direction.
	2702	latitude scale	See SCALE.
	2703	lattice	A pattern formed by two or more families of intersecting lines, such as HYPERBOLIC LINES OF POSITION or parts of circles, drawn on CHARTS, P... more A pattern formed by two or more families of intersecting lines, such as HYPERBOLIC LINES OF POSITION or parts of circles, drawn on CHARTS, PLOTTING SHEETS or SOUNDING BOARDS.
	2704	launch	Large open or half decked boat.
	2705	lava	The fluid or semi-fluid matter flowing from a volcano. The substance that results from the cooling of the molten ROCK. Part of the ocean bed... more The fluid or semi-fluid matter flowing from a volcano. The substance that results from the cooling of the molten ROCK. Part of the ocean bed is composed of lava.
	2706	layer	A single thickness, coat, fold or STRATUM.
	2707	layer depth	In OCEANOGRAPHY, the thickness of the MIXED LAYER; or the DEPTH to the top of the THERMOCLINE.
	2708	layer depth prediction	Predetermining the DEPTH to the top of the THERMOCLINE over a given ocean area.
	2709	layering	A method of emphasizing on a CHART differences in HEIGHT or DEPTH by use of varying tints. Also referred to as layer tinting.
	2710	layer of no motion	A LAYER, assumed to be at rest at some DEPTH in the OCEAN.
	2711	layer tinting	See LAYERING.
	2712	lead (lèd)	A heavy, soft, malleable, bluish-grey metallic chemical element. Anything made of this metal, such as a WEIGHT for sounding DEPTHS of water.
	2713	lead (led)	A navigable PASSAGE through ICE. The amount one cyclic motion is ahead of another, expressed in DEGREES.
	2714	lead: deep sea	A heavy SOUNDING LEAD the WEIGHT of which may be varied from about 15 to over 50 kilos depending on the DEPTHS to be sounded. Also called di... more A heavy SOUNDING LEAD the WEIGHT of which may be varied from about 15 to over 50 kilos depending on the DEPTHS to be sounded. Also called dipsey lead.
	2715	lead: drift	SOUNDING LEAD dropped to BOTTOM, to indicate movement of a vessel.
	2716	lead: fish	A fish-shaped SOUNDING LEAD which reduces to a minimum the INCLINATION of the wire when trailed, making unnecessary its removal from the wat... more A fish-shaped SOUNDING LEAD which reduces to a minimum the INCLINATION of the wire when trailed, making unnecessary its removal from the water between SOUNDINGS.
	2717	lead: hand	A light SOUNDING LEAD (3 to 5 kilos) having usually a line of not more than 40 to 50 METRES.
	2718	lead: sounding	A LEAD attached to a line used for measuring the DEPTH of water. Also called plummet.
	2719	leader cable	See CABLE.
	2720	leading light(s)	See LIGHT.
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