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	Eng ID	Term	Definition
	3081	mainland	The principal LAND or largest part of a CONTINENT, as distinguished from a relatively small ISLAND or PENINSULA.
	3082	main scheme station	See STATION.
	3083	maintained depth	The depth at which a channel is kept by human influence, usually by dredging.
	3084	maintenance	All procedures and activities required to keep equipment operational.
	3085	major planet	See PLANET.
	3086	make the land	To sight and approach or reach LAND from seaward.
	3087	make way	To progress through the water.
	3088	making way	Progressing through the water.
	3089	mandatory routeing system	A ROUTEING SYSTEM adopted by the INTERNATIONAL MARITIME ORGANIZATION, in accordance with the requirements of regulation V/10 of the 1974 SO... more A ROUTEING SYSTEM adopted by the INTERNATIONAL MARITIME ORGANIZATION, in accordance with the requirements of regulation V/10 of the 1974 SOLAS convention, for mandatory use by all ships, certain categories of ships or ships carrying certain cargoes.
	3090	manoeuvre	Planned and controlled movement of a vehicle.
	3091	mangrove	One of several genera of tropical trees or shrubs which produce many prop roots and grow along low-lying COASTS into SHALLOW WATER.
	3092	manometer	An instrument for measuring pressure of gases and vapours.
	3093	mantle	The relatively plastic region between the CRUST and CORE of the EARTH. Also called asthenosphere.
	3094	manuscript map	See MAP.
	3095	map	A representation (usually on a flat medium) of all or a portion of the EARTH or other CELESTIAL BODY, showing the relative size and position... more A representation (usually on a flat medium) of all or a portion of the EARTH or other CELESTIAL BODY, showing the relative size and position of features to some given SCALE or PROJECTION; also, a representation of all or part of the CELESTIAL SPHERE. A map may emphasize, generalize, or omit the representation of certain features to satisfy specific requirements. Maps are frequently categorized and referred to according to the type of information which they are primarily designed to convey, to distinguish them from maps of other types.
	3096	map	(v.t.). To prepare a MAP or engage in a mapping operation.
	3097	map: anaglyphic	A MAP specially printed in two complementary colours in such a way that, when viewed through a twin EYEPIECE of the same colours, a thre... more A MAP specially printed in two complementary colours in such a way that, when viewed through a twin EYEPIECE of the same colours, a three-dimensional impression of RELIEF is seen.
	3098	map: base	A MAP showing certain fundamental information, used as a base upon which additional data of specialized nature are compiled. Also, a MAP c... more A MAP showing certain fundamental information, used as a base upon which additional data of specialized nature are compiled. Also, a MAP containing all the information from which MAPS showing specialized information can be prepared; a source map.
	3099	map: cadastral	A MAP showing the BOUNDARIES of subdivision of LAND, usually with the BEARINGS and lengths thereof and the area of individual tracts, for ... more A MAP showing the BOUNDARIES of subdivision of LAND, usually with the BEARINGS and lengths thereof and the area of individual tracts, for purposes of describing and recording ownership. A cadastral map may also show culture, drainage, and other features relating to the value and use of LAND. See also PLAT.
	3100	map: contour	A TOPOGRAPHIC MAP which portrays RELIEF by means of CONTOURS.
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