Aviation Abbreviations

A/FD    Airport/Facility Directory
AAS     Airport Advisory Service
ADF     Automatic Direction Finder
AGL     Above Ground Level
AIM     Airmans Information Manual
ALS     Approach Light System
ARSA    Airport Radar Service Area
ARSR    Air Routs Surveillance Radar
ASR     Airport Surveillance Radar
ATC     Air Traffic Control
ATIS    Auto Terminal Information Service
AWOS    Automated Weather Observing System
CAS     Calibrated Air Speed
CONSOL  Low or Medium Frequency Long Range Navigational Aid
CT      Control Tower
CTAF    Common Traffic Advisory Frequencies
CZ      Control Zone
DH      Decision Height
DME     Distance Measuring Equipment Compatible with TACAN
EAS     Equivalent Air Speed
ELT     Emergency Locator Transmitter
FAA     Federal Aviation Administration
FAR     Federal Aviation Regulations
FM      Fan Marker
FSS     Flight Service Station
GS      Glide Slope
HIRL    High Intensity Runway Light system
HIWAS   Hazardous Inflight Weather Advisory Service
IAS     Indicated Airspeed
ICAO    International Civil Aviation Organization
IFR     Instrument Flight Rules
ILS     Instrument Landing System
IM      Inner Marker
INT     Intersection
LDA     Localizer Directional Aid
LFR     Low Frequency Radio Range
LMM     Locator at Middle Marker (compass)
LOC     ILS Localizer
LOM     Compass Locator at Outer Marker
M       Mach Number
MAA     Maximum Authorized IFR Altitude
MALS    Medium intensity Approach Light System
MALSR   Medium intensity Approach Light System w/Runway Alignment lights
MCA     Minimum Crossing Altitude
MDA     Minimum Descent Altitude
MEA     Minimum Enroute IFR Altitude
MM      Middle Marker
MOA     Military Operation Area
MOCA    Minimum Obstruction Clearance Altitude
MRA     Minimum Reception Altitude
MSL     Mean Sea Level
MTR     Military Training Route
NAV/COM Navigation Communications Radio
NAVAID  Navigational Aid
NDB     Non Directional Beacon (ADF)
NFCT    Non-Federal Control Tower
NO A/G  No Air to Ground Communications
NOAA    National Oceanic and Atmospheric Administration
NOPT    No Procedure Turn Required
NOTAM   Notice to Airmen Affecting Airport
OCSL
OEI     One Engine Inoperative
OM      Outer Marker ILS
PAR     Precision Approach Radar
PCL     Pilot Controlled Lighting
RAIL    Runway Alignment Indicator Light System
RBN     Radio Beacon
RCLM    Runway Centerline Marking
RCLS    Runway Centerline Light System
REIL    Runway End Identification Lights
RFSS    Remote Flight Service Station
RR      Low or Medium Frequency Radio Range Station
RVR     Runway Visual Range as measured in the touchdown zone area
SALS    Short Approach Light System
SOB     Souls On Board
SSALS   Simplified Short Approach Light System
SSALSR  Simplified Short Approach Light System w/Runway alignment lights
TA      Transition Area
TACAN   Tactical Air Navigational Aid (UHF)
TAS     True Air Speed
TCA     Terminal Control Area
TCAS    Traffic Collision Avoidance System
TDZL    Touch Down Zone Lights
TRSA    Terminal Radar Service Area
TVOR    Terminal VHF Omnirange Station
TWEB    Transcribed Weather Broadcast
UNICOM  Aeronautical Advisory Communication
V1      Takeoff decision speed (formerly denoted as critical engine failure speed)
V2      Min minimum takeoff safety speed  
V2      Takeoff safety speed
VA      Design Maneuvering Speed
VB      Design Speed for Maximum Gust Intensity
VC      Design Cruising Speed
VD      Design Diving Speed
VDF/MDF Demonstrated Flight Diving Speed
VF      Design Flap Speed
VFC/MFC Maximum Speed for Stability Characteristics
VFE     Maximum Flap Extended Speed
VFR     Visual Flight Rules
VH      Maximum speed in level flight with maximum continuous power
VHF     Very High Frequency
VLE     Maximum landing gear extended speed
VLO     Maximum landing gear operating speed
VLOF    Lift-off Speed
VMC     Minimum control speed with the critical engine inoperative
VMO/MMO Maximum operating limit speed
VMU     Minimum unstick speed
VNE     Never-exceed speed
VNO     Maximum structural cruising speed
VOR     VHF Omnirange Station
VOR-DME VHF Omnidirectional Range/Distance Measuring Equipment
VORTAC  VHF Omnidirectional Range/Tactical Air Navigation
VR      Rotation speed
VS      Stalling speed or the minimum steady flight speed at which the airplane is controllable
VS0     Stalling speed or the minimum steady flight speed in the landing configuration
VS1     Stalling speed or the minimum steady flight speed obtained in a specific configuration
VTOL    Vertical Take Off and Landing
VTOSS   Takeoff Safety Speed for Category A Rotorcraft
VX      Speed for best angle of climb
VY      Speed for best rate of climb