Aviation Acronyms

Here's a comprehensive list of aviation acronyms and airport acronyms. We hope this helps you navigate the complex world of aviation jargon! Please let us know if you find any errors or if you'd like to suggest additional acronyms.

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A top
A/C Aircraft
A/G Air to Ground
A/H Altitude/Height
AAC Mike Monroney Aeronautical Center
AAF Army Air Field
AAI Arrival Aircraft Interval
AAP Advanced Automation Program
AAR Airport Acceptance Rate
ABDIS Automated Data Interchange System Service B
ACAIS Air Carrier Activity Information System
ACAS Aircraft Collision Avoidance System
ACC Airports Consultants Council
ACC Area Control Center
ACCT Accounting Records
ACD Automatic Call Distributor
ACDO Air Carrier District Office
ACF Area Control Facility
ACFO Aircraft Certification Field Office
ACFT Aircraft
ACI-NA Airports Council International - North America
ACID Aircraft Identification
ACIP Airport Capital Improvement Plan
ACLS Automatic Carrier Landing System
ACLT Actual Landing Time Calculated
ACO Office of Airports Compliance and Field Operations
ACO Aircraft Certification Office
ACRP Airport Cooperative Research Program
ADA Air Defense Area
ADAP Airport Development Aid Program
ADAS AWOS Data Acquisition System
ADCCP Advanced Data Communications Control Procedure
ADDA Administrative Data
ADF Automatic Direction Finding
ADI Automatic De-Ice and Inhibitor
ADIZ Air Defense Identification Zone
ADL Aeronautical Data-Link
ADLY Arrival Delay
ADO Airline Dispatch Office
ADP Automated Data Processing
ADS Automatic Dependent Surveillance
ADSIM Airfield Delay Simulation Model
ADSY Administrative Equipment Systems
ADTN Administrative Data Transmission Network
ADTN2000 Administrative Data Transmission Network 2000
ADVO Administrative Voice
AEG Aircraft Evaluation Group
AERA Automated En-Route Air Traffic Control
AEX Automated Execution
AF Airway Facilities
AFB Air Force Base
AFIS Automated Flight Inspection System
AFP Area Flight Plan
AFRES Air Force Reserve Station
AFS Airways Facilities Sector
AFSFO AFS Field Office
AFSFU AFS Field Unit
AFSOU AFS Field Office Unit (Standard is AFSFOU)
AFSS Automated Flight Service Station
AFTN Automated Fixed Telecommunications Network
AGL Above Ground Level
AID Airport Information Desk
AIG Airbus Industries Group
AIM Airman's Information Manual
AIP Airport Improvement Plan
AIRMET Airmen's Meteorological Information
AIRNET Airport Network Simulation Model
AIS Aeronautical Information Service
AIT Automated Information Transfer
ALP Airport Layout Plan
ALS Approach Lighting System
ALSF1 ALS with Sequenced Flashers I
ALSF2 ALS with Sequenced Flashers II
ALSIP Approach Lighting System Improvement Plan
ALTRV Altitude Reservation
AMASS Airport Movement Area Safety System
AMCC ACF/ARTCC Maintenance Control Center
AMOS Automated Meteorological Observation Station
AMP ARINC Message Processor (OR) Airport Master Plan
AMVER Automated Mutual Assistance Vessel Rescue System
ANC Alternate Network Connectivity
ANCA Airport Noise and Capacity Act
ANG Air National Guard
ANGB Air National Guard Base
ANMS Automated Network Monitoring System
ANSI American National Standards Group
AOA Air Operations Area
AP Acquisition Plan
APP Approach
APS Airport Planning Standard
AQAFO Aeronautical Quality Assurance Field Office
ARAC Army Radar Approach Control (AAF)
ARAC Aviation Rulemaking Advisory Committee
ARCTR FAA Aeronautical Center or Academy
ARF Airport Reservation Function
ARFF Aircraft Rescue and Fire Fighting
ARINC Aeronautical Radio Inc.
ARLNO Airline Office
ARO Airport Reservation Office
ARP Airport Reference Point
ARSA Airport Service Radar Area
ARSR Air Route Surveillance Radar
ARTCC Air Route Traffic Control Center
ARTS Automated Radar Terminal System
ASAS Aviation Safety Analysis System
ASC AUTODIN Switching Center
ASCP Aviation System Capacity Plan
ASD Aircraft Situation Display
ASDA Accelerate Stop Distance Available
ASLAR Aircraft Surge Launch And Recovery
ASM Available Seat Mile
ASP Arrival Sequencing Program
ASOS Automatic Surface Observation System
ASQP Airline Service Quality Performance
ASR Airport Surveillance Radar
ASTA Airport Surface Traffic Automation
ASV Airline Schedule Vendor
AT Air Traffic
ATA Air Transport Association of America
ATAS Airspace and Traffic Advisory Service
ATCAA Air Traffic Control Assigned Airspace
AT&T American Telephone and Telegraph
AT&T ASDC AT&T Agency Service Delivery Center
AT&T CSA AT&T Customer Support Associate
ATC Air Traffic Control
ATCBI Air Traffic Control Beacon Indicator
ATCCC Air Traffic Control Command Center
ATCO Air Taxi Commercial Operator
ATCRB Air Traffic Control Radar Beacon
ATCRBS Air Traffic Control Radar Beacon System
ATCSCC Air Traffic Control Systems Command Center
ATCT Airport Traffic Control Tower
ATIS Automated Terminal Information Service
ATM Air Traffic Management
ATM Asynchronous Transfer Mode
ATMS Advanced Traffic Management System
ATN Aeronautical Telecommunications Network
ATOMS Air Traffic Operations Management System
ATS Air Traffic Service
ATSCCP ATS Contingency Command Post
ATTIS AT&T Information Systems
AUTODIN DoD Automatic Digital Network
AUTOVON DoD Automatic Voice Network
AVN Aviation Standards National Field Office, Oklahoma City
AWIS Airport Weather Information
AWOS Automated Weather Observation System
AWP Aviation Weather Processor
AWPG Aviation Weather Products Generator
AWS Air Weather Station
B top
BANS BRITE Alphanumeric System
BART Billing Analysis Reporting Tool (GSA software tool)
BASIC Basic Contract Observing Station
BASOP Military Base Operations
BCA Benefit/Cost Analysis
BCR Benefit/Cost Ratio
BDAT Digitized Beacon Data
BMP Best Management Practices
BOC Bell Operating Company
bps bits per second
BRI Basic Rate Interface
BRITE Bright Radar Indicator Terminal Equipment
BRL Building Restriction Line
BUEC Back-up Emergency Communications
BUECE Back-up Emergency Communications Equipment
C top
CAA Civil Aviation Authority
CAA Clean Air Act
CAB Civil Aeronautics Board
CARF Central Altitude Reservation Facility
CASFO Civil Aviation Security Office
CAT Category
CAT Clear Air Turbulence
CAU Crypto Ancillary Unit
CBI Computer Based Instruction
CBT Computer Based Training
CCC Communications Command Center
CCCC Staff Communications
CCCH Central Computer Complex Host
CC&O Customer Cost and Obligation
CCSD Command Communications Service Designator
CCS7-NI Communication Channel Signal-7 Network Interconnect
CCU Central Control Unit
CD Common Digitizer
CDR Cost Detail Report
CDT Controlled Departure Time
CDTI Cockpit Display of Traffic Information
CENTX Central Telephone Exchange
CEP Capacity Enhancement Program
CEQ Council on Environmental Quality
CERAP Central Radar Approach
CFC Central Flow Control
CFCF Central Flow Control Facility
CFCS Central Flow Control Service
CFIT Controlled Flight Into Terrain
CFR Code of Federal Regulations
CFWP Central Flow Weather Processor
CFWU Central Flow Weather Unit
CGAS Coast Guard Air Station
CLC Course Line Computer
CLIN Contract Line Item
CLT Calculated Landing Time
CM Commercial Service Airport
CNMPS Canadian Minimum Navigation Performance Specification Airspace
CNS Consolidated NOTAM System
CNSP Consolidated NOTAM System Processor
CO Central Office
COE U.S. Army Corps of Engineers
COMCO Command Communications Outlet
CONUS Continental United States
CORP Private Corporation other than ARINC or MITRE
CPE Customer Premise Equipment
CPMIS Consolidated Personnel Management Information System
CRA Conflict Resolution Advisory
CRDA Converging Runway Display Aid
CRT Cathode Ray Tube
CSA Communications Service Authorization
CSIS Centralized Storm Information System
CSO Customer Service Office
CSR Communications Service Request
CSS Central Site System
C/S/S/N Capacity/Safety/Security/Noise
CTA Controlled Time of Arrival
CTA Control Area
CTA/FIR Control Area/Flight Information Region
CTAF Common Traffic Advisory Frequency
CTAS Center Tracon Automation System
CTMA Center Traffic Management Advisor
CUPS Consolidated Uniform Payroll System
CVFR Controlled Visual Flight Rules
CVTS Compressed Video Transmission Service
CW Continuous Wave
CWSU Central Weather Service Unit
CWY Clearway
D top
DA Direct Access
DA Decision Altitude/Decision Height
DA Descent Advisor
DABBS DITCO Automated Bulletin Board System
DAIR Direct Altitude and Identity Readout
DAR Designated Agency Representative
DARC Direct Access Radar Channel
dBA Decibels A-weighted
DBCRC Defense Base Closure and Realignment Commission
DBE Disadvantaged Business Enterprise
DBMS Data Base Management System
DBRITE Digital Bright Radar Indicator Tower Equipment
DCA Defense Communications Agency
DCAA Dual Call Automatic Answer Device
DCCU Data Communications Control Unit
DCE Data Communications Equipment
DDA Dedicated Digital Access
DDD Direct Distance Dialing
DDM Difference in Depth of Modulation
DDS Digital Data Service
DEA Drug Enforcement Agency
DEDS Data Entry and Display System
DEIS Draft Environmental Impact Statement
DEP Departure
DEWIZ Distance Early Warning Identification Zone
DF Direction Finder
DFAX Digital Facsimile
DFI Direction Finding Indicator
DGPS Differential Global Positioning Satellite (System)
DH Decision Height
DID Direct Inward Dial
DIP Drop and Insert Point
DIRF Direction Finding
DITCO Defense Information Technology Contracting Office Agency
DME Distance Measuring Equipment
DME/P Precision Distance Measuring Equipment
DMN Data Multiplexing Network
DNL Day-Night Equivalent Sound Level (Also called Ldn)
DOD Direct Outward Dial
DoD Department of Defense
DOI Department of Interior
DOS Department of State
DOT Department of Transportation
DOTS Dynamic Ocean Tracking System
DOTCC Department of Transportation Computer Center
DSCS Digital Satellite Compression Service
DSUA Dynamic Special Use Airspace
DTS Dedicated Transmission Service
DUAT Direct User Access Terminal
DVFR Defense Visual Flight Rules
DVFR Day Visual Flight Rules
DVOR Doppler Very High Frequency Omni-Directional Range
DYSIM Dynamic Simulator
E top
E-MSAW En-Route Automated Minimum Safe Altitude Warning
EA Environmental Assessment
EARTS En Route Automated Radar Tracking System
ECOM En Route Communications
ECVFP Expanded Charted Visual Flight Procedures
EDCT Expedite Departure Path
EFAS En Route Flight Advisory Service
EFC Expect Further Clearance
EFIS Electronic Flight Information Systems
EIAF Expanded Inward Access Features
EIS Environmental Impact Statement
ELT Emergency Locator Transmitter
ELWRT Electrowriter
EMAS Engineered Materials Arresting System
EMPS En Route Maintenance Processor System
EMS Environmental Management System
ENAV En Route Navigational Aids
EPA Environmental Protection Agency
EPS Engineered Performance Standards
EOF Emergency Operating Facility
EPSS Enhanced Packet Switched Service
ERAD En Route Broadband Radar
ESEC En Route Broadband Secondary Radar
ESP En Route Spacing Program
ESYS En Route Equipment Systems
ESF Extended Superframe Format
ETA Estimated Time of Arrival
ETE Estimated Time En Route
ETG Enhanced Target Generator
ETMS Enhanced Traffic Management System
ETN Electronic Telecommunications Network
EVAS Enhanced Vortex Advisory System
EVCS Emergency Voice Communications System
F top
F/A Flight Attendant
FAA Federal Aviation Administration
F&E Facility and Equipment
FAAAC FAA Aeronautical Center
FAACIS FAA Communications Information System
FAATC FAA Technical Center
FAC Facility
FAF Final Approach Fix
FAP Final Approach Point
FAPM FTS2000 Associate Program Manager
FAR Federal Aviation Regulation
FAATSAT FAA Telecommunications Satellite
FAST Final Approach Spacing Tool
FAX Facsimile Equipment
FBO Fixed Base Operator
FBS Fall Back Switch
FCC Federal Communications Commission
FCLT Freeze Calculated Landing Time
FCOM FSS Radio Voice Communications
FCPU Facility Central Processing Unit
FDAT Flight Data Entry and Printout (FDEP) and Flight Data Service
FDE Flight Data Entry
FDEP Flight Data Entry and Printout
FDIO Flight Data Input/Output
FDIOC Flight Data Input/Output Center
FDIOR Flight Data Input/Output Remote
FDM Frequency Division Multiplexing
FDP Flight Data Processing
FED Federal
FEIS Final Environmental Impact Statement
FEP Front End Processor
FFAC From Facility
FIFO Flight Inspection Field Office
FIG Flight Inspection Group
FINO Flight Inspection National Field Office
FIPS Federal Information Publication Standard
FIR Flight Information Region
FIRE Fire Station
FIRMR Federal Information Resource Management Regulation
FL Flight Level
FLOWSIM Traffic Flow Planning Simulation
FMA Final Monitor Aid
FMF Facility Master File
FMIS FTS2000 Management Information System
FMS Flight management System
FNMS FTS2000 Network Management System
FOIA Freedom Of Information Act
FONSI Finding of No Significant Impact
FP Flight Plan
FRC Request Full Route Clearance
FSAS Flight Service Automation System
FSDO Flight Standards District Office
FSDPS Flight Service Data Processing System
FSEP Facility/Service/Equipment Profile
FSP Flight Strip Printer
FSPD Freeze Speed Parameter
FSS Flight Service Station
FSSA Flight Service Station Automated Service
FSTS Federal Secure Telephone Service
FSYS Flight Service Station Equipment Systems
FTS Federal Telecommunications System
FTS2000 Federal Telecommunications System 2000
FUS Functional Units or Systems
FWCS Flight Watch Control Station
G top
GA General Aviation
GAA General Aviation Activity
GAAA General Aviation Activity and Avionics
GADO General Aviation District Office
GCA Ground Control Approach
GNAS General National Airspace System
GNSS Global Navigation Satellite System
GOES Geostationary Operational Environmental Satellite
GOEST GOES Terminal Equipment
GPRA Government Performance Results Act
GPS Global Positioning Satellite
GPWS Ground Proximity Warning System
GRADE Graphical Airspace Design Environment
GS Glide Slope Indicator
GSA General Services Administration
GSE Ground Support Equipment
H top
H Non-Directional Radio Homing Beacon (NDB)
HAA Height Above Airport
HAL Height Above Landing
HARS High Altitude Route System
HAT Height Above Touchdown
HAZMAT Hazardous Materials
HCAP High Capacity Carriers
HLDC High Level Data Link Control
HDME NDB with Distance Measuring Equipment
HDQ FAA Headquarters
HELI Heliport
HF High Frequency
HH NDB, 2kw or More
HI-EFAS High Altitude EFAS
HOV High Occupancy Vehicle
HSI Horizontal Situation Indicators
HUD Housing and Urban Development
HWAS Hazardous In-Flight Weather Advisory
I top
IA Indirect Access
IAF Initial Approach Fix
I/AFSS International AFSS
IAP Instrument Approach Procedures
IAPA Instrument Approach Procedures Automation
IBM International Business Machines
IBP International Boundary Point
IBR Intermediate Bit Rate
ICAO International Civil Aviation Organization
ICSS International Communications Switching Systems
IDAT Interfacility Data
IF Intermediate Fix
IFCP Interfacility Communications Processor
IFDS Interfacility Data System
IFEA In-Flight Emergency Assistance
IFO International Field Office
IFR Instrument Flight Rules
IFSS International Flight Service Station
ILS Instrument Landing System
IM Inner Marker
IMC Instrument Meteorological Conditions
INM Integrated Noise Model
INS Inertial Navigation System
IRMP Information Resources Management Plan
ISDN Integrated Services Digital Network
ISMLS Interim Standard Microwave Landing System
ITI Interactive Terminal Interface
IVRS Interim Voice Response System
IW Inside Wiring
K top
Kbps Kilobits Per Second
Khz Kilohertz
KVDT Keyboard Video Display Terminal
L top
LAA Local Airport Advisory
LAAS Low Altitude Alert System
LABS Leased A B Service
LABSC LABS GS-200 Computer
LABSR LABS Remote Equipment
LABSW LABS Switch System
LAHSO Land and Hold Short Operation
LAN Local Area Network
LATA Local Access and Transport Area
LAWRS Limited Aviation Weather Reporting System
LCF Local Control Facility
LCN Local Communications Network
LDA Localizer Directional Aid
LDA Landing Directional Aid
LDIN Lead-in Lights
LEC Local Exchange Carrier
LF Low Frequency
LINCS Leased Interfacility NAS Communications System
LIS Logistics and Inventory System
LLWAS Low Level Wind Shear Alert System
LM/MS Low/Medium Frequency
LMM Locator Middle Marker
LMS LORAN Monitor Site
LOC Localizer
LOCID Location Identifier
LOI Letter of Intent
LOM Compass Locator at Outer Marker
LORAN Long Range Aid to Navigation
LPV Lateral Precision Performance with Vertical Guidance
LRCO Limited Remote Communications Outlet
LRNAV Long Range Navigation
LRR Long Range Radar
M top
MAA Maximum Authorized Altitude
MALS Medium Intensity Approach Lighting System
MALSF MALS with Sequenced Flashers
MALSR MALS with Runway Alignment Indicator Lights
MAP Maintenance Automation Program
MAP Military Airport Program
MAP Missed Approach Point
MAP Modified Access Pricing
Mbps Megabits Per Second
MCA Minimum Crossing Altitude
MCAS Marine Corps Air Station
MCC Maintenance Control Center
MCL Middle Compass Locater
MCS Maintenance and Control System
MDA Minimum Descent Altitude
MDT Maintenance Data Terminal
MEA Minimum En Route Altitude
METI Meteorological Information
MF Middle Frequency
MFJ Modified Final Judgment
MFT Meter Fix Crossing Time/Slot Time
MHA Minimum Holding Altitude
MIA Minimum IFR Altitudes
MIDO Manufacturing Inspection District Office
MIS Meteorological Impact Statement
MISC Miscellaneous
MISO Manufacturing Inspection Satellite Office
MIT Miles In Trail
MITRE Mitre Corporation
MLS Microwave Landing System
MM Middle Marker
MMC Maintenance Monitoring Console
MMS Maintenance Monitoring System
MNPS Minimum Navigation Performance Specification
MNPSA Minimum Navigation Performance Specifications Airspace
MOA Memorandum of Agreement
MOA Military Operations Area
MOCA Minimum Obstruction Clearance Altitude
MODE C Altitude Encoded Beacon Reply
MODE C Altitude Reporting Mode of Secondary Radar
MODE S Mode Select Beacon System
MOU Memorandum of Understanding
MPO Metropolitan Planning Organization
MPS Maintenance Processor Subsystem (OR) Master Plan Supplement
MRA Minimum Reception Altitude
MRC Monthly Recurring Charge
MSA Minimum Safe Altitude
MSAW Minimum Safe Altitude Warning
MSL Mean Sea Level
MSN Message Switching Network
MTCS Modular Terminal Communications System
MTI Moving Target Indicator
MUX Multiplexor
MVA Minimum Vectoring Altitude
MVFR Marginal Visual Flight Rules
N top
NAAQS National Ambient Air Quality Standards
NADA NADIN Concentrator
NADIN National Airspace Data Interchange Network
NAILS National Airspace Integrated Logistics Support
NAPRS National Airspace Performance Reporting System
NAS National Airspace System or Naval Air Station
NASDC National Aviation Safety Data
NASP National Airspace System Plan
NASPAC National Airspace System Performance Analysis Capability
NATCO National Communications Switching Center
NAVAID Navigation Aid
NAVMN Navigation Monitor and Control
NAWAU National Aviation Weather Advisory Unit
NAWPF National Aviation Weather Processing Facility
NCAR National Center for Atmospheric Research; Boulder, CO
NCF National Control Facility
NCIU NEXRAD Communications Interface Unit
NCP Noise Compatibility Program
NCS National Communications System
NDB Non-Directional Radio Homing Beacon
NEM Noise Exposure Map
NEPA National Environmental Policy Act
NEXRAD Next Generation Weather Radar
NFAX National Facsimile Service
NFDC National Flight Data Center
NFIS NAS Facilities Information System
NI Network Interface
NICS National Interfacility Communications System
NPE Non-primary Airport Entitlement
NPIAS National Plan of Integrated Airport Systems
NM Nautical Mile
NMAC Near Mid Air Collision
NMC National Meteorological Center
NMCE Network Monitoring and Control Equipment
NMCS Network Monitoring and Control System
NOAA National Oceanic and Atmospheric Administration
NOC Notice Of Completion
NOTAM Notice to Airmen
NPDES National Pollutant Discharge Elimination System
NPIAS National Plan of Integrated Airport Systems
NRC Non-Recurring Charge
NRCS National Radio Communications Systems
NSAP National Service Assurance Plan
NSRCATN National Strategy to Reduce Congestion on America's Transportation Network
NSSFC National Severe Storms Forecast Center
NSSL National Severe Storms Laboratory; Norman, OK
NTAP Notices To Airmen Publication
NTP National Transportation Policy
NTSB National Transportation Safety Board
NTZ No Transgression Zone
NWS National Weather Service
NWSR NWS Weather Excluding NXRD
NSWRH NWS Regional Headquarters
NXRD Advanced Weather Radar System
O top
OAG Official Airline Guide
OALT Operational Acceptable Level of Traffic
OAT Outside Air Temperature
OAW Off-airway Weather Station
ODAL Omnidirectional Approach Lighting System
ODAPS Oceanic Display and Processing Station
OEP Operational Evolution Plan / Partnership
OFA Object Free Area
OFDPS Offshore Flight Data Processing System
OFT Outer Fix Time
OFZ Obstacle Free Zone
OM Outer Marker
OMB Office of Management and Budget
ONER Oceanic Navigational Error Report
OPLT Operational Acceptable Level of Traffic
OPSW Operational Switch
OPX Off Premises Exchange
ORD Operational Readiness Demonstration
OTR Oceanic Transition Route
OTS Organized Track System
P top
PABX Private Automated Branch Exchange
PAD Packet Assembler/Disassembler
PAM Peripheral Adapter Module
PAPI Precision Approach Path Indicator
PAR Precision Approach Radar
PAR Preferential Arrival Route
PATWAS Pilots Automatic Telephone Weather Answering Service
PBCT Proposed Boundary Crossing Time
PBRF Pilot Briefing
PBX Private Branch Exchange
PCA Positive Control Airspace
PCM Pulse Code Modulation
PDAR Preferential Arrival And Departure Route
PDC Pre-Departure Clearance
PDC Program Designator Code
PDR Preferential Departure Route
PDN Public Data Network
PFC Passenger Facility Charge
PGP Planning Grant Program
PIC Principal Interexchange Carrier
PIDP Programmable Indicator Data Processor
PIREP Pilot Weather Report
PMS Program Management System
POLIC Police Station
POP Point Of Presence
POT Point Of Termination
PPIMS Personal Property Information Management System
PR Primary Commercial Service Airport
PRI Primary Rate Interface
PRM Precision Runway Monitor
PSDN Public Switched Data Network
PSN Packet Switched Network
PSS Packet Switched Service
PSTN Public Switched Telephone Network
PTC Presumed-to-Conform
PUB Publication
PUP Principal User Processor
PVC Permanent Virtual Circuit
PVD Plan View Display
R top
RAIL Runway Alignment Indicator Lights
RAPCO Radar Approach Control (USAF)
RAPCON Radar Approach Control (FAA)
RATCC Radar Air Traffic Control Center
RATCF Radar Air Traffic Control Facility (USN)
RBC Rotating Beam Ceilometer
RBDPE Radar Beacon Data Processing Equipment
RBSS Radar Bomb Scoring Squadron
RCAG Remote Communications Air/Ground
RCC Rescue Coordination Center
RCF Remote Communication Facility
RCCC Regional Communications Control Centers
RCIU Remote Control Interface Unit
RCL Radio Communications Link
RCLR RCL Repeater
RCLT RCL Terminal
RCO Remote Communications Outlet
RCU Remote Control Unit
RDAT Digitized Radar Data
RDP Radar Data Processing
RDSIM Runway Delay Simulation Model
REIL Runway End Identification Lights
RF Radio Frequency
RL General Aviation Reliever Airport
RMCC Remote Monitor Control Center
RMCF Remote Monitor Control Facility
RML Radio Microwave Link
RMLR RML Repeater
RMLT RML Terminal
RMM Remote Maintenance Monitoring
RMMS Remote Maintenance Monitoring System
RMS Remote Monitoring Subsystem
RMSC Remote Monitoring Subsystem Concentrator
RNAV Area Navigation
RNP Required Navigation Performance
ROD Record of Decision
ROSA Report of Service Activity
ROT Runway Occupancy Time
RP Restoration Priority
RPC Restoration Priority Code
RPG Radar Processing Group
RPZ Runway Protection Zone
RRH Remote Reading Hygrothermometer
RRHS Remote Reading Hydrometer
RRWDS Remote Radar Weather Display
RRWSS RWDS Sensor Site
RSA Runway Safety Area
RSAT Runway Safety Action Team
RSS Remote Speaking System
RT Remote Transmitter
RT & BTL Radar Tracking And Beacon Tracking Level
RTAD Remote Tower Alphanumerics Display
RTCA Radio Technical Commission for Aeronautics
RTP Regional Transportation Plan
RTR Remote Transmitter/Receiver
RTRD Remote Tower Radar Display
RVR Runway Visual Range
RW Runway
RWP Real-time Weather Processor
S top
S/S Sector Suite
SAC Strategic Air Command
SAFI Semi Automatic Flight Inspection
SALS Short Approach Lighting System
SATCOM Satellite Communications
SAWRS Supplementary Aviation Weather Reporting System
SBGP State Block Grant Program
SCC System Command Center
SCVTS Switched Compressed Video Telecommunications Service
SDF Simplified Direction Finding
SDF Software Defined Network
SDIS Switched Digital Integrated Service
SDP Service Delivery Point
SDS Switched Data Service
SEL Single Event Level
SELF Simplified Short Approach Lighting System With Sequenced Flashing Lights
SFAR38 Special Federal Aviation Regulation 38
SHPO State Historic Preservation Officer
SIC Service Initiation Charge
SID Station Identifier
SID Standard Instrument Departure
SIGMET Significant Meteorological Information
SIMMOD Airport and Airspace Simulation Model
SIP State Implementation Plan
SM Statute Miles
SMGC Surface Movement Guidance and Control
SMPS Sector Maintenance Processor Subsystem
SMS Safety Management System
SMS Simulation Modeling System
SNR Signal-to-Noise Ratio, also: S/N
SOC Service Oversight Center
SOAR System of Airports Reporting
SOIR Simultaneous Operations On Intersecting Runways
SOIWR Simultaneous Operations on Intersecting Wet Runways
SRA Surveillance Radar Approach
SRAP Sensor Receiver and Processor
SSALF SSALS with Sequenced Flashers
SSALR Simplified Short Approach Lighting System
SSB Single Side Band
STAR Standard Terminal Arrival Route
STD Standard
STMUX Statistical Data Multiplexer
STOL Short Takeoff and Landing
SURPIC Surface Picture
SVCA Service A
SVCB Service B
SVCC Service C
SVCO Service O
SVFO Interphone Service F (A)
SVFB Interphone Service F (B)
SVFC Interphone Service F (C)
SVFD Interphone Service F (D)
SVFR Special Visual Flight Rules
T top
T1MUX T1 Multiplexer
TAAS Terminal Advance Automation System
TACAN Tactical Aircraft Control and Navigation
TAF Terminal Area Forecast
TARS Terminal Automated Radar Service
TAS True Air Speed
TATCA Terminal Air Traffic Control Automation
TAVT Terminal Airspace Visualization Tool
TCA Traffic Control Airport or Tower Control Airport
TCA Terminal Control Area
TCACCIS Transportation Coordinator Automated Command and Control Information System
TCAS Traffic Alert And Collision Avoidance System
TCC DOT Transportation Computer Center
TCCC Tower Control Computer Complex
TCE Tone Control Equipment
TCLT Tentative Calculated Landing Time
TCO Telecommunications Certification Officer
TCOM Terminal Communications
TCS Tower Communications System
TDLS Tower Data-Link Services
TDMUX Time Division Data Multiplexer
TDWR Terminal Doppler Weather Radar
TELCO Telephone Company
TELMS Telecommunications Management System
TERPS Terminal Instrument Procedures
TFAC To Facility
TH Threshold
TIMS Telecommunications Information Management System
TIPS Terminal Information Processing System
TL Taxilane
TMA Traffic Management Advisor
TMC Traffic Management Coordinator
TMC/MC Traffic Management Coordinator/Military Coordinator
TMCC Terminal Information Processing System
TMCC Traffic Management Computer Complex
TMF Traffic Management Facility
TML Television Microwave Link
TMLI Television Microwave Link Indicator
TMLR Television Microwave Link Repeater
TMLT Television Microwave Link Terminal
TM&O Telecommunications Management and Operations
TMP Traffic Management Processor
TMS Traffic Management System
TMSPS Traffic Management Specialists
TMU Traffic Management Unit
TODA Takeoff Distance Available
TOF Time Of Flight
TOFMS Time of Flight Mass Spectrometer
TOPS Telecommunications Ordering and Pricing System (GSA software tool)
TORA Take-off Run Available
TNAV Terminal Navigational Aids
TR Telecommunications Request
TRACAB Terminal Radar Approach Control in Tower Cab
TRACON Terminal Radar Approach Control Facility
TRAD Terminal Radar Service
TRB Transportation Research Board
TRNG Training
TSA Taxiway Safety Area
TSEC Terminal Secondary Radar Service
TSP Telecommunications Service Priority
TSR Telecommunications Service Request
TSYS Terminal Equipment Systems
TTMA TRACON Traffic Management Advisor
TTY Teletype
TVOR Terminal VHF Omnidirectional Range
TW Taxiway
TWEB Transcribed Weather Broadcast
TWR Tower (non-controlled)
U top
UAS Uniform Accounting System
UHF Ultra High Frequency
URA Uniform Relocation Assistance and Real Property Acquisition Policies Act of 1970
USAF United States Air Force
USC United States Code
USOC Uniform Service Order Code
V top
VALE Voluntary Airport Low Emission
VASI Visual Approach Slope Indicator
VDME VOR with Distance Measuring Equipment
VF Voice Frequency
VFR Visual Flight Rules
VHF Very High Frequency
VLF Very Low Frequency
VMC Visual Meteorological Conditions
VNAV Visual Navigational Aids
VNTSC Volpe National Transportation System Center
VON Virtual On-net
VOR VHF Omnidirectional Range
VOR/DME VHF Omnidirectional Range/Distance Measuring Equipment
VORTAC VOR collocated with TACAN
VOT VOR Test Facility
VP/D Vehicle/Pedestrian Deviation
VRS Voice Recording System
VSCS Voice Switching and Control System
VTA Vertex Time of Arrival
VTAC VOR collocated with TACAN
VTOL Vertical Takeoff and Landing
VTS Voice Telecommunications System
W top
WAAS Wide Area Augmentation System
WAN Wide Area Network
WC Work Center
WCP Weather Communications Processor
WECO Western Electric Company
WESCOM Western Electric Satellite Communications
WMSC Weather Message Switching Center
WMSCR Weather Message Switching Center Replacement
WSCMO Weather Service Contract Meteorological Observatory
WSFO Weather Service Forecast Office
WSMO Weather Service Meteorological Observatory
WSO Weather Service Office
WTHR Weather
WX Weather