IAC — Interagency Air Committee
IACC — Interagency Air Cartographic Committee
IAF — Initial Approach Fix
IAP — Instrument Approach Procedure
ICAO — International Civil Aviation Authority
IDT — Identifier
IF — Intermediate Fix
IFR — Instrument Flight Rules
ILS — Instrument Landing System
IMC — Instrument Meteorological Conditions
INS — Inertial Navigation System
IR — Instrument Route (Military)
IRU — Inertial Reference Unit
J
K
L
LAA — Local Airport Advisory
LAAS — Local Area Augmentation System
LAHSO — Land and Hold Short
LDA — Landing Distance Available
LDA — Localizer-type Directional Aid
Ldg — Landing
LF — Low Frequency
LIRL — Low Intensity Runway Lights
LNAV — Lateral Navigation
LOC — Localizer
LOM — Locator Outer Marker
LPV — Localizer Performance with Vertical Guidance
LRRS — Long Range Radar Station
LTP — Landing Threshold Point
M
MAA — Maximum Authorized Altitude
MAP — Missed Approach Point
MCA — Minimum Crossing Altitude
MCAS — Marine Corps Air Station
MDA — Minimum Descent Altitude
MDH — Minimum Descent Height
MEA — Minimum Enroute Altitude
MEF — Maximum Elevation Figure
MF — Medium Frequency
MIA — Minimum IFR Altitude
MIRL — Medium Intensity Runway Lights
MOA — Military Operations Areas
MOCA — Minimum Obstruction Clearance Altitude
MON — Minimum Operational Network
MORA — Minimum Off-Route Altitude
MRA — Minimum Reception Altitude
MSA — Minimum Safe Altitude
MSL — Mean Sea Level
MTA — Minimum Turning Altitude
MTR — Military Training Route
MVA — Minimum Vector Altitude
N
N — North
N/A — Not Applicable
NA — Not Authorized
NAAS — Naval Auxiliary Air Station
NAS — Naval Air Station
NAS — National Airspace System
NAV — Naval Air Facility
NAVAID — Navigational Aid (Ground based)
NDB — Non-Directional Radiobeacon
NextGen — Next Generation Air Transportation System
NFDC — National Flight Data Center
NFPO — National Flight Procedures Office
NM — Nautical Mile
NOAA — National Oceanic and Atmospheric Administration
NO A/G — No Air-to-Ground Communication
NOTAM — Notice to Airmen
NoPT — No Procedure Turn
NPA — Non-Precision Approach
NWS — National Weather Service
O
OAT — Outside Air Temperature
OBS — Omni Bearing Selector
OCA — Ocean Control Area
OCS — Obstacle Clearance Surface
ODP — Obstacle Departure Procedure
OM — Outer Marker
OROCA — Off Route Obstruction Clearance Altitude
P
PA — Precision Approach
PAR — Precision Approach Radar
PBN — Performance-Based Navigation
PRM — Precision Runway Monitor
PT — Procedure Turn
PTP — Point-to-Point
Pvt — Private
R
R — Radial
R — Receive
R — Restricted Area (Special Use Airspace)
RCO — Remote Communications Outlet
RCLS — Runway Centerline Lighting Systems
RF — Radius-to-Fix
RNAV — Area Navigation
RNP — Required Navigation Performance
RNP AR — Required Navigation Performance Authorization Required
ROC — Required Obstacle Clearance
RP — Right Pattern
RVR — Runway Visual Range
RVSM — Reduced Vertical Separation Minimum
Rwy — Runway
S
S — South
SAAAR — Special Aircraft and Aircrew Authorization Required
SAAR — Special Aircraft and Aircrew Requirements
SATNAV — Satellite Navigation
SDF — Simplified Directional Facility
SER — Start End of Runway
SFAR — Special Flight Rules Area
SFC — Surface
SFRA — Special Flight Rules Area
SIAPs — Standard Instrument Approach Procedures
SID — Standard Instrument Departure
SM — Statute Mile
SMAR — Special Military Activity Routes
SMGCS — Surface Movement Guidance and Control System
SOIA — Simultaneous Offset Instrument Approaches
SSV — Standard Service Volume
STAR — Standard Terminal Arrival Procedure
SUA — Special Use Airspace
SVFR — Special Visual Flight Rules
