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	Eng ID	Term	Definition
	4161	Q-wave	See WAVE: LOVE.
	4162	race	Swiftly flowing water in a narrow CHANNEL or RIVER; also the CHANNEL itself which may be artificial as in a mill-race. Also a swift rush of ... more Swiftly flowing water in a narrow CHANNEL or RIVER; also the CHANNEL itself which may be artificial as in a mill-race. Also a swift rush of water through a narrow CHANNEL in TIDAL WATERS and caused by the tidal movement of the waters. See TIDE RACE.
	4163	Racon	A RADAR BEACON which returns a coded SIGNAL which provides identification of the beacon as well as RANGE and BEARING. The RANGE and BEARING ... more A RADAR BEACON which returns a coded SIGNAL which provides identification of the beacon as well as RANGE and BEARING. The RANGE and BEARING are indicated by the location of the first character received on the radar PPI scope. The name 'racon' is derived from the words radar beacon.
	4164	radar	A method, system or technique of using beamed, reflected, and timed RADIO WAVES for detecting, locating, or tracking objects, and for measur... more A method, system or technique of using beamed, reflected, and timed RADIO WAVES for detecting, locating, or tracking objects, and for measuring ALTITUDES. The electronic equipment or apparatus used to generate, transmit, receive, and usually, to display radio scanning or locating waves; a radar set. The name 'radar' is derived from the words radio detecting and ranging.
	4165	radar: primary	RADAR which transmits a SIGNAL and receives the incident energy reflected from an object to detect the object in contrast to secondary radar... more RADAR which transmits a SIGNAL and receives the incident energy reflected from an object to detect the object in contrast to secondary radar which receives PULSES from a TRANSPONDER triggered by PULSES transmitted from the RADAR.
	4166	radar: secondary	See RADAR: PRIMARY.
	4167	radar altimeter	See ALTIMETER: RADIO.
	4168	radar beacon	A TRANSPONDER BEACON transmitting a coded SIGNAL on radar frequency, permitting an interrogating craft to determine the BEARING and RANGE ... more A TRANSPONDER BEACON transmitting a coded SIGNAL on radar frequency, permitting an interrogating craft to determine the BEARING and RANGE of the TRANSPONDER. Also called RACON. See RAMARK.
	4169	radar bearing	See BEARING.
	4170	radar buoy	See BUOY.
	4171	radar chain	An arrangement of radar sets in a chain usually used for vessel traffic control.
	4172	radar chart	See CHART.
	4173	radar conspicuous object	An object which returns a strong radar echo.
	4174	radar dome	A dome shaped structure used to protect the antenna of a radar installation.
	4175	radar line	See RADAR GUIDED TRACK.
	4176	radar surveillance station	A radar station established for traffic surveillance.
	4177	radargrammetry	The process of obtaining reliable measurements in bi- and three-dimensional image processing by means of RADAR.
	4178	radar guided tracks	Recommended TRACKS along which ships can be guided by coastal radar stations in the event of bad VISIBILITY.
	4179	radar reflector	A device capable of or intended for reflecting radar signals.
	4180	radar-responder	See RADAR BEACON.
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