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Total record count: 6269.

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	Eng ID	Term	Definition
	4281	recommended route	See ROUTE: RECOMMENDED.
	4282	recommended track	A route which has been specially examined to ensure so far as possible that it is free of dangers and along which, ships are advised to navi... more A route which has been specially examined to ensure so far as possible that it is free of dangers and along which, ships are advised to navigate.
	4283	reconnaissance	In SURVEYING, a general examination or SURVEY of the main features, or certain specific features, of a region, usually as a preliminary to ... more In SURVEYING, a general examination or SURVEY of the main features, or certain specific features, of a region, usually as a preliminary to a more detailed SURVEY. An examination of an area to gain specific information, as the weather conditions, extent and nature of ICE, etc.
	4284	reconnaissance map	See MAP.
	4285	reconnaissance survey	See SURVEY.
	4286	recorder	The man on a survey party who records the observational DATA. A recording instrument. The part of an instrument or machine that records.
	4287	recording anemometer	See ANEMOGRAPH.
	4288	recording barometer	See BAROMETER.
	4289	recoverable station	See STATION.
	4290	recovery of station	In SURVEYING, the identifying and checking of an original STATION. This is considered as recovered when its MARK (MONUMENT) is identified as... more In SURVEYING, the identifying and checking of an original STATION. This is considered as recovered when its MARK (MONUMENT) is identified as authentic and proved to be occupying its original site.
	4291	rectangular coordinates	See COORDINATES.
	4292	rectification	The process of projecting a tilted or OBLIQUE PHOTOGRAPH onto an horizontal reference plane, the angular relationship between the PHOTOGRAPH... more The process of projecting a tilted or OBLIQUE PHOTOGRAPH onto an horizontal reference plane, the angular relationship between the PHOTOGRAPH and the plane being determined by ground methods.
	4293	rectified altitude	See ALTITUDE: APPARENT.
	4294	rectilinear current	See CURRENT: REVERSING.
	4295	rectilinear stream	See CURRENT: REVERSING.
	4296	rectoblique plotter	A mechanical device intended for RECTIFICATION of individual RAYS on tilted or OBLIQUE PHOTOGRAPHS.
	4297	recurrence rate	See REPETITION RATE.
	4298	red mud	See MUD.
	4299	red sector	A sector of the CIRCLE OF VISIBILITY of a navigational LIGHT in which a red light is exhibited. Such sectors are designated by their limitin... more A sector of the CIRCLE OF VISIBILITY of a navigational LIGHT in which a red light is exhibited. Such sectors are designated by their limiting BEARINGS, as observed at some point other than the LIGHT. Red sectors are often located so that they warn of danger to vessels.
	4300	red tide	A red or reddish-brown discoloration of surface waters, most frequently in coastal regions, caused by concentration of certain microscopic ... more A red or reddish-brown discoloration of surface waters, most frequently in coastal regions, caused by concentration of certain microscopic organisms, particularly dinoflagellates. Toxins produced by the dinoflagellates can cause mass kills of fishes and other marine animals.
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