|
Abbreviation/Acronym
|
Meaning
|
|
AAWU |
Alaskan Aviation Weather
Unit |
|
AC |
Advisory Circular
|
|
ACAR |
Aircraft Communications
Addressing and Reporting System |
|
ADDS |
Aviation Digital Data
Service |
|
ADCUS |
Advise Customs
|
|
ADF |
Automatic Direction
Finder |
|
AFB |
Air Force Base
|
|
AFCS |
Automatic Flight Control
System |
|
A/FD |
Airport/Facility
Directory |
|
AFM |
Aircraft Flight Manual
|
|
AFSS |
Automated Flight Service
Station |
|
AIM |
Aeronautical Information
Manual |
|
AIRMET |
Airmen's Meteorological
Information |
|
ALD |
Available Landing
Distance |
|
ALS |
Approach Light Systems
|
|
AMSL |
Above Mean Sea Level
|
|
ANP |
Actual Navigation
Performance |
|
AOCC |
Airline Operations
Control Center |
|
AP |
Autopilot System
|
|
ARFF IC |
Aircraft Rescue and Fire
Fighting Incident Commander |
|
ARINC |
Aeronautical Radio
Incorporated |
|
ARO |
Airport Reservations
Office |
|
ARSA |
Airport Radar Service
Area |
|
ARSR |
Air Route Surveillance
Radar |
|
ARTCC |
Air Route Traffic Control
Center |
|
ARTS |
Automated Radar Terminal
System |
|
ASOS |
Automated Surface
Observing System |
|
ASR |
Airport Surveillance
Radar |
|
ATC |
Air Traffic Control
|
|
ATCRBS |
Air Traffic Control Radar
Beacon System |
|
ATCT |
Airport Traffic Control
Tower |
|
ATD |
Along Track
(Straight-line) Distance |
|
ATIS |
Automatic Terminal
Information Service |
|
ATT |
Attitude Retention System
|
|
AWC |
Aviation Weather Center
|
|
AWOS |
Automated Weather
Observing System |
|
AWW |
Severe Weather Forecast
Alert |
|
BBS |
Bulletin Board System
|
|
BC |
Back Course |
|
C/A |
Coarse Acquisition
|
|
CAT |
Clear Air Turbulence
|
|
CD |
Controller Display
|
|
CDI |
Course Deviation
Indicator |
|
CERAP |
Combined Center/RAPCON
|
|
CFA |
Controlled Firing Area
|
|
CFR |
Code of Federal
Regulations |
|
CTAF |
Common Traffic Advisory
Frequency |
|
CVFP |
Charted Visual Flight
Procedure |
|
CVRS |
Computerized Voice
Reservation System |
|
CWA |
Center Weather Advisory
|
|
CWSU |
Center Weather Service
Unit |
|
DA |
Decision Altitude
|
|
DCA |
Ronald Reagan Washington
National Airport |
|
DCP |
Data Collection Package
|
|
DF |
Direction Finder
|
|
DH |
Decision Height
|
|
DME |
Distance Measuring
Equipment |
|
DME/N |
Standard DME |
|
DME/P |
Precision DME
|
|
DOD |
Department of Defense
|
|
DP |
Instrument Departure
Procedure |
|
DPU |
Data Processor Unit
|
|
DRT |
Diversion
Recovery Tool |
|
DUATS |
Direct User Access
Terminal System |
|
DVA |
Diverse Vector Area
|
|
DVFR |
Defense Visual Flight
Rules |
|
DVRSN |
Diversion |
|
EFAS |
En Route Flight Advisory
Service |
|
ELT |
Emergency Locator
Transmitter |
|
EPE |
Estimate of Position
Error |
|
ESV |
Expanded Service Volume
|
|
ETA |
Estimated Time of Arrival
|
|
ETD |
Estimated Time of
Departure |
|
ETE |
Estimated Time En Route
|
|
EWINS |
Enhanced Weather
Information System |
|
EWR |
Newark International
Airport |
|
FA |
Area Forecast
|
|
FAA |
Federal Aviation
Administration |
|
FAF |
Final Approach Fix
|
|
FAWP |
Final Approach Waypoint
|
|
FB |
Fly-by |
|
FCC |
Federal Communications
Commission |
|
FD |
Flight Director System
|
|
FDC |
Flight Data Center
|
|
FIR |
Flight Information Region
|
|
FISDL |
Flight Information
Services Data Link |
|
FLIP |
Flight Information
Publication |
|
FMS |
Flight Management System
|
|
FMSP |
Flight Management System
Procedure |
|
FO |
Fly-over |
|
FPNM |
Feet Per Nautical Mile
|
|
FSDO |
Flight Standards District
Office |
|
FSS |
Flight Service Station
|
|
GBAS |
Ground Based Augmentation
System |
|
GEO |
Geostationary Satellite
|
|
GLS |
GNSS Landing System
|
|
GNSS |
Global Navigation
Satellite System |
|
GNSSP |
Global Navigation
Satellite System Panel |
|
GPS |
Global Positioning System
|
|
GRI |
Group Repetition Interval
|
|
GSD |
Geographical Situation
Display |
|
GUS |
Ground Uplink Station
|
|
HAT |
Height Above Touchdown
|
|
HDTA |
High Density Traffic
Airports |
|
HIRL |
High Intensity Runway
Lights |
|
HIWAS |
Hazardous Inflight
Weather Advisory Service |
|
HRR |
Helicopter Rapid
Refueling Procedures |
|
Hz |
Hertz |
|
IAF |
Initial Approach Fix
|
|
IAP |
Instrument Approach
Procedure |
|
IAS |
Indicated Air Speed
|
|
IAWP |
Initial Approach Waypoint
|
|
ICAO |
International Civil
Aviation Organization |
|
IF |
Intermediate Fix
|
|
IFIM |
International Flight
Information Manual |
|
IFR |
Instrument Flight Rules
|
|
ILS |
Instrument Landing System
|
|
IM |
Inner Marker |
|
IMC |
Instrument Meteorological
Conditions |
|
INS |
Inertial Navigation
System |
|
IOC |
Initial Operational
Capability |
|
IR |
IFR Military Training
Route |
|
ITWS |
Integrated Terminal
Weather System |
|
JFK |
John F. Kennedy
International Airport |
|
kHz |
Kilohertz |
|
LAA |
Local Airport Advisory
|
|
LAAS |
Local Area Augmentation
System |
|
LAHSO |
Land and Hold Short
Operations |
|
LAWRS |
Limited Aviation Weather
Reporting Station |
|
LDA |
Localizer Type
Directional Aid |
|
LGA |
LaGuardia Airport
|
|
LIRL |
Low Intensity Runway
Lights |
|
LLWAS |
Low Level Wind Shear
Alert System |
|
LNAV |
Lateral Navigation
|
|
LOC |
Localizer |
|
LOP |
Line-of-position
|
|
LORAN |
Long Range Navigation
System |
|
MAHWP |
Missed Approach Holding
Waypoint |
|
MAP |
Missed Approach Point
|
|
MAWP |
Missed Approach Waypoint
|
|
MDA |
Minimum Descent Altitude
|
|
MEA |
Minimum En Route Altitude
|
|
METAR |
Aviation Routine Weather
Report |
|
MHz |
Megahertz |
|
MIRL |
Medium Intensity Runway
Lights |
|
MLS |
Microwave Landing System
|
|
MM |
Middle Marker
|
|
MOA |
Military Operations Area
|
|
MOCA |
Minimum Obstruction
Clearance Altitude |
|
MSA |
Minimum Safe Altitude
|
|
MSAW |
Minimum Safe Altitude
Warning |
|
MSL |
Mean Sea Level
|
|
MTI |
Moving Target Indicator
|
|
MTOS |
Mountain Obscuration
|
|
MTR |
Military Training Route
|
|
MVA |
Minimum Vectoring
Altitude |
|
MWO |
Meteorological Watch
Office |
|
NACO |
National Aeronautical
Charting Office |
|
NAS |
National Airspace System
|
|
NASA |
National Aeronautics and
Space Administration |
|
NAVAID |
Navigational Aid
|
|
NCWF |
National Convective
Weather Forecast |
|
NDB |
Nondirectional Radio
Beacon |
|
NEXRAD |
Next Generation Weather
Radar |
|
NFDC |
National Flight Data
Center |
|
NIDS |
National Institute for
Discovery Sciences |
|
NIMA |
National Imagery and
Mapping Agency |
|
NM |
Nautical Mile
|
|
NMAC |
Near Midair Collision
|
|
NOAA |
National Oceanic and
Atmospheric Administration |
|
NOPAC |
North Pacific
|
|
NoPT |
No Procedure Turn
Required |
|
NOTAM |
Notice to Airmen
|
|
NSA |
National Security Area
|
|
NSW |
No Significant Weather
|
|
NTAP |
Notices to Airmen
Publication |
|
NTSB |
National Transportation
Safety Board |
|
NTZ |
No Transgression Zone
|
|
NWS |
National Weather Service
|
|
OAT |
Outside Air Temperature
|
|
OBS |
Omni-bearing Selector
|
|
OM |
Outer Marker |
|
ORD |
Chicago O'Hare
International Airport |
|
PAPI |
Precision Approach Path
Indicator |
|
PAR |
Precision Approach Radar
|
|
PAR |
Preferred Arrival Route
|
|
PC |
Personal Computer
|
|
P/CG |
Pilot/Controller Glossary
|
|
PFD |
Personal Flotation Device
|
|
PinS |
Point-in-Space
|
|
PIREP |
Pilot Weather Report
|
|
POB |
Persons on Board
|
|
POI |
Principal Operations
Inspector |
|
PPS |
Precise Positioning
Service |
|
PRM |
Precision Runway Monitor
|
|
PT |
Procedure Turn
|
|
RA |
Resolution Advisory
|
|
RAA |
Remote
Advisory Airport |
|
RAIM |
Receiver Autonomous
Integrity Monitoring |
|
RAIS |
Remote
Airport Information Service |
|
RBDT |
Ribbon Display Terminals
|
|
RCAG |
Remote Center Air/Ground
|
|
RCC |
Rescue Coordination
Center |
|
RCLS |
Runway Centerline
Lighting System |
|
RCO |
Remote Communications
Outlet |
|
RD |
Rotor Diameter
|
|
REIL |
Runway End Identifier
Lights |
|
RLIM |
Runway Light Intensity
Monitor |
|
RMI |
Radio Magnetic Indicator
|
|
RNAV |
Area Navigation
|
|
RNP |
Required Navigation
Performance |
|
RVR |
Runway Visual Range
|
|
SAR |
Search and Rescue
|
|
SAS |
Stability Augmentation
System |
|
SCAT-1 DGPS |
Special Category I
Differential GPS |
|
SDF |
Simplified Directional
Facility |
|
SFL |
Sequenced Flashing Lights
|
|
SFR |
Special Flight Rules
|
|
SIAP |
Standard Instrument
Approach Procedure |
|
SIGMET |
Significant
Meteorological Information |
|
SM |
Statute Mile |
|
SMGCS |
Surface Movement Guidance
Control System |
|
SNR |
Signal-to-noise Ratio
|
|
SOP |
Standard Operating
Procedure |
|
SPC |
Storm Prediction Center
|
|
SPS |
Standard Positioning
Service |
|
STAR |
Standard Terminal Arrival
|
|
STMP |
Special Traffic
Management Program |
|
SWSL |
Supplemental Weather
Service Locations |
|
TA |
Traffic Advisory
|
|
TAA |
Terminal Arrival Area
|
|
TAC |
Terminal Area Chart
|
|
TACAN |
Tactical Air Navigation
|
|
TAF |
Aerodrome Forecast
|
|
TAS |
True Air Speed
|
|
TCAS |
Traffic Alert and
Collision Avoidance System |
|
TCH |
Threshold Crossing Height
|
|
TD |
Time Difference
|
|
TDWR |
Terminal Doppler Weather
Radar |
|
TDZL |
Touchdown Zone Lights
|
|
TEC |
Tower En Route Control
|
|
TIBS |
Telephone Information
Briefing Service |
|
TLS |
Transponder Landing
System |
|
TPP |
Terminal Procedures
Publications |
|
TRSA |
Terminal Radar Service
Area |
|
TSO |
Technical Standard Order
|
|
TWEB |
Transcribed Weather
Broadcast |
|
TWIB |
Terminal Weather
Information for Pilots System |
|
UFO |
Unidentified Flying
Object |
|
UHF |
Ultrahigh Frequency
|
|
U.S. |
United States
|
|
USCG |
United States Coast Guard
|
|
UTC |
Coordinated Universal
Time |
|
UWS |
Urgent Weather SIGMET
|
|
VAR |
Volcanic Activity
Reporting |
|
VASI |
Visual Approach Slope
Indicator |
|
VDA |
Vertical Descent Angle
|
|
VDP |
Visual Descent Point
|
|
VFR |
Visual Flight Rules
|
|
VGSI |
Visual Glide Slope
Indicator |
|
VHF |
Very High Frequency
|
|
VIP |
Video Integrator
Processor |
|
VMC |
Visual Meteorological
Conditions |
|
Vmini |
Minimum speed - IFR
|
|
VNAV |
Vertical Navigation
|
|
Vnei |
Never exceed speed - IFR
|
|
VOR |
Very High Frequency
Omni-directional Range |
|
VORTAC |
VHF Omni-directional
Range/Tactical Air Navigation |
|
VOT |
VOR Test Facility
|
|
VR |
VFR Military Training
Route |
|
VV |
Vertical Visibility
|
|
WA |
AIRMET |
|
WAAS |
Wide Area Augmentation
System |
|
WAC |
World Aeronautical Chart
|
|
WFO |
Weather Forecast Office
|
|
WGS-84 |
World Geodetic System of
1984 |
|
WMO |
World Meteorological
Organization |
|
WMS |
Wide-Area Master Station
|
|
WMSC |
Weather Message Switching
Center |
|
WMSCR |
Weather Message Switching
Center Replacement |
|
WP |
Waypoint |
|
WRS |
Wide-Area Ground
Reference Station |
|
WS |
SIGMET |
|
WSO |
Weather Service Office
|
|
WSP |
Weather System Processor
|
|
WST |
Convective Significant
Meteorological Information |
|
WW |
Severe Weather Watch
Bulletin |
