AFE  Above Field Elevation 
AFM  Airplane Flight Manual 
AFMS  Airplane Flight Manual Supplement 
AGL  Above Ground Level 
AHRS  Attitude/Heading Reference System 
ANN  EGPWS annunciated alert generated by another 
aircraft system 
AOA  Angle of Attack 
ASL  Above Sea Level 
ATC  Air Traffic Control 
BIT  Built In Test 
CFIT  Controlled Flight into Terrain 
CTC  Computed Terrain Clearance 
dB  Decibels 
DH  Decision Height 
EFIS  Electronic Flight Instrument System 
EGPWC/S  Enhanced Ground Proximity Warning 
Computer/System 
FAA  Federal Aviation Administration 
FMS  Flight Management System 
FPM  Feet Per Minute 
F/W  Fail Warning 
GPS  Global Positioning System 
GPWS  Ground Proximity Warning System 
G/S  Glideslope 
HDOP  Horizontal Dilution of Precision 
HFOM  Horizontal Figure of Merit 
HIL  Horizontal Integrity Limit 
Hz  Hertz (cps) 
ICD  Interface Control Document 
ILS  Instrument Landing System 
INOP  Inoperative 
IRS  Inertial Reference System 
IVS  Inertial Vertical Speed 
MCP  Mode Control Panel 
MCU  Modular Concept Unit 
MFD  Multi Function Display 
MLS  Microwave Landing System 
MON  S
MARTRUNWAY
®
 and SMARTLANDING
TM 
monitors 
MSL  Mean Sea Level 
MTC  Minimum Terrain Clearance 
NM  Nautical Mile 
PCMCIA  Personal Computer Memory Card Industry 
Association