Instrument Acronyms

If I’ve missed any, let me know. Some might be wrong, I hope not

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Last updated: February 14, 2026

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Hint	Answer
AMLCD	Active Matrix Liquid Crystal Displays
ADIRU	Air Data Inertial Reference Unit
ASI	Air Speed Indicator
AFN	Air Traffic Facilities Notification
ACARS	Aircraft Communications Addressing and Reporting System
ADC	Aircraft Data Computer
ALU	Arithmetic Logic Unit
AHRS	Attitude and Heading Reference System
ADI	Attitude Director Indicator
AI	Attitude Indicator
APFDSCP	Auto Pilot Flight Director System Control Panel
ADS	Automatic Dependent Surveillance
AFCS	Automatic Flight Control System
APFDS	Autopilot Flight Director System
CRT	Cathode Ray Tube
CVR	Cockpit Voice Recorder
CVS	Combined VIsion System
CWS	Control Wheel Steering
CPDLC	Controller Pilot Data Link Communication
CI	Cost Index
DFDR	Digital Flight Data Recorder
DRC	Direct Reading Compass
DG	Directional Gyroscope
DME	Distance Measuring Equipment
ECAM	Electronic Central Aircraft Monitoring
EFIS	Electronic Flight Instrument System
EICAS	Engine Indication and Crew Alerting System
EGPWS	Enhanced Ground Proximity Warning System
EVS	Enhanced Vision System
FDR	Flight Data Recorder
FEP	Flight Envelope Protection
FMC	Flight Management Computer

Hint	Answer
FMS	Flight Management System
FMA	Flight Mode Annunciator
FLTA	Forward Looking Terrain Avoidance
FADEC	Full Authority Digital Engine Control
FANS	Future Air Navigation Systems
GNSS	Global Navigation Satellite Systems
GPWS	Ground Proximity Warning System
HUD	Heads Up Display
HSI	Horizontal Situation Indicator
INS	Inertial Navigation System
IRS	Inertial Reference System
IRU	Inertial Reference Unit
IVSI	Instantaneous Vertical Speed Indicator
ISIS	Integrated Standby Instrument System
LRU	Line Replaceable Unit
LVDT	Linear Variable Differential Transformer
MEMS	Micro Electrical Mechanical System
MCDU	Mode Control Display Unit
MCP	Mode Control Panel
MFP	Multi Function Probes
PFD	Primary Flight Display
RADALT	Radio Altimeter
RMI	Radio Magnetic Indicator
RRC	Remote Reading Compass
SWS	Stall Warning System
SAT	Static Air Temperature
SVS	Synthetic Vision System
TAT	Total Air Temperature
TWS	Touch Wheel Steering
TCAS	Traffic Collision Avoidance System
VSI	Vertical Speed Indicator
VOR	VHF Omnidirectional Range

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