Statistics for Aviation/Aircraft Acronyms

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Hint	Answer	% Correct
ATC	Air Traffic Control	98%
APU	Auxiliary Power Unit	72%
VFR	Visual Flight Rules	67%
ILS	Instrument Landing System	62%
IFR	Instrument Flight Rules	59%
GA	General Aviation	53%
IAS	Indicated Air Speed	50%
HUD	Heads-Up Display	45%
CFI	Certified Flight Instructor	43%
VNAV	Vertical Navigation	43%
AGL	Above Ground Level	41%
TAS	True Air Speed	41%
VHF	Very High Frequency	40%
LNAV	Lateral Navigation	34%
MSL	Mean Sea Level	34%
DME	Distance Measuring Equipment	26%
OAT	Outside Air Temperature	26%
UHF	Ultrahigh Frequency	26%
ICAO	International Civil Aviation Organization	24%
ATIS	Automated Terminal Information Service	21%
NAVAID	Navigational Aid	19%
PAPI	Precision Approach Path Indicator	17%
NASA	National Aeronautics and Space Administration	16%
SAM	Surface to air missile/system area monitor	16%
SAR	Search and Rescue	14%
RNAV	Area Navigation	7%
CDI	Course Deviation Indicator	7%
TACAN	Tactical Air Navigation	5%
VOR	VHF Omnidirectional Range	5%
ADI	Attitude Direction Indicator	3%
BFM	Basic Fighter Maneuvers	3%
VASI	Visual Approach Slope Indicator	3%
MTR	Military Training Route	2%
SAS	Stability Augmentation System	2%