NAV acronyms

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Last updated: June 6, 2025

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Hint	Answer
DME	distance measuring equipment
ILS	Instrument landing system
LOC	localiser
PSR	primary surveillance radar
SSR	secondary surveillance radar
RADAR	radio detection and ranging
MLAT	multilateration
ADS	automatic dependent surveillance
RNAV	area navigation
INS	inertial navigation system
GNSS	global navigation satellite system
CDI	course deviation indicator
GPS	Global Positioning System
PBN	performance based navigation
RNP	required navigation performance
SID	standard instrument departure
STAR	standard terminal arrival route
EFIS	electronic flight information system
HDG	heading
TMG	track made good
GS	ground speed
TAS	true air speed
VOR	very high frequency omnidirectional range
VHF	very high frequency
HF	high frequency
UHF	ultra high frequency
NDB	non directional beacon
GP	glide path
ADF	automatic direction finder

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