Airport Acronyms and Abbreviations
The following acronyms appear in FAA airport standards and related publications.
AAM — Advanced Air Mobility
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
AAM — Advanced Air Mobility
AAP — Advanced Automation Program
AAR — Airport Acceptance Rate
ABDIS — Automated Data Interchange System Service B
AC — Advisory Circular
AC — Alternating Current
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
ACM — Airport Certification Manual
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
ADG — Airplane Design Group
ADI — Automatic De-Ice and Inhibitor
ADIN — AUTODIN Service
ADIP — Airport Data and Information Portal
ADIZ — Air Defense Identification Zone
ADL — Aeronautical Data-Link
ADLY — Arrival Delay
ADO — Airline Dispatch Office
ADP — Automated Data Processing
ADS — Automatic Dependent Surveillance
ADS-B — Automatic Dependent Surveillance-Broadcast
ADSIM — Airfield Delay Simulation Model
ADSY — Administrative Equipment Systems
ADTN — Administrative Data Transmission Network
ADTN2000 — Administrative Data Transmission Network 2000
ADVO — Administrative Voice
AED — Aircraft Evaluation Division
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
AGIS — Airports Geographic Information System (Replaced byt ADIP)
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
ARC — Airport Reference Code
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
ARP — Aerospace Recommended Practice
ARRA — American Recovery and Reinvestment Act of 2009
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 — Annual Service Volume
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
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
ATISR — ATIS Recorder
ATM — Air Traffic Management
ATM — Asynchronous Transfer Mode
ATMS — Advanced Traffic Management System
ATN — Aeronautical Telecommunications Network
ATODN — AUTODIN Terminal (FUS)
ATOVN — AUOTVON (Facility)
ATOMS — Air Traffic Operations Management System
ATS — Air Traffic Service
ATSCCP — ATS Contingency Command Post
AUTODIN — DoD Automatic Digital Network
AUTOVON — DoD Automatic Voice Network
AVON — AUTOVON Service
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
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
CAA — Civil Aviation Authority
CAA — Clean Air Act
CAB — Civil Aeronautics Board
CAC — Citizen's Advisory Committee
CAD — Computer Aided Design
CARES — Coronavirus Aid, Relief, and Economic Security (CARES) Act
CARF — Central Altitude Reservation Facility
CASFO — Civil Aviation Security Office
CAT — Category
CAT — Clear — Air Turbulence
CATS — Certification Activity Tracking System
CAU — Crypto Ancillary Unit
CBI — Computer Based Instruction
CCC — Communications Command Center
CCCC — Staff Communications
CCCH — Central Computer Complex Host
CC&O — Customer Cost and Obligation
CCS — Combined Charging Standard
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 — Center Radar Approach Control
CERAP — Central Radar Approach
CERAP — Combined Center/Radar Approach Control
CFC — Central Flow Control
CFCF — Central Flow Control Facility
CFCS — Central Flow Control Service
CFR — Code of Federal Regulations
CFWP — Central Flow Weather Processor
CFWU — Central Flow Weather Unit
CGAS — Coast Guard Air Station
CIP — Capital Improvement Plan
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
CS/PP — Construction Safety and Phasing Plan
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
CWA — Clean Water Act
CW — Continuous Wave
CWSU — Central Weather Service Unit
CWY — Clearway
D — Controlling Dimension
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
DC — Direct Current
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-MSAW — En-Route Automated Minimum Safe Altitude Warning
EA — Environmental Assessment
EARTS — En Route Automated Radar Tracking System
EB — Engineering Brief
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
ESS — Energy Storage System
ESYS — En Route Equipment Systems
ESF — Extended Superframe Format
ETA — Estimated Time of Arrival
ETE — Estimated Time En Route
ETG — Enhanced Target Generator
ETL — Effective Translational Lift
ETMS — Enhanced Traffic Management System
ETN — Electronic Telecommunications Network
EV — Electric Vehicle
EVAS — Enhanced Vortex Advisory System
EVCS — Emergency Voice Communications System
eVTOL — Electric Vertical Takeoff and Landing
FAA — Federal Aviation Administration
F&E — Facilities and Equipment
FAAAC — FAA Aeronautical Center
FAACIS — FAA Communications Information System
FAATC — FAA Technical Center
FAATSAT — FAA Telecommunications Satellite
FAC — Facility
FAF — Final Approach Fix
FAP — Final Approach Point
FAPM — FTS2000 Associate Program Manager
FAR — Federal Aviation Regulation
FAST — Final Approach Spacing Tool
FATO — Final Approach and Take Off Area
FAX — Facsimile Equipment
FBO — Fixed Base Operator
FBS — Fall Back Switch
FC — Failure Condition
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
FOD — Foreign Object Debris or Foreign Object Damage
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
GA — General Aviation
GAA — General Aviation Activity
GAAA — General Aviation Activity and Avionics
GADO — General Aviation District Office
GCA — Ground Control Approach
GIS — Geographic Information System
GNAS — General National Airspace System
GNSS — Global Navigation Satellite System
GOES — Geostationary Operational Environmental Satellite
GOESF — GOES Feed Point
GOEST — GOES Terminal Equipment
GPRA — Government Performance Results Act
GPS — Global Positioning System
GPWS — Ground Proximity Warning System
GRADE — Graphical Airspace Design Environment
GS — Glide Slope Indicator
GSA — General Services Administration
GSE — Ground Support Equipment
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 Material
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
HOGE — Hover Out of Ground Effect
HOV — High Occupancy Vehicle
HPZ — Heliport Protection Zone
HSI — Horizontal Situation Indicators
HUD — Housing and Urban Development
HWAS — Hazardous In-- Flight Weather Advisory
Hz — HERTZ
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
IEC — International Electrotechnical Commission
IEEE — Institute of Electrical and Electronics Engeneers
IF — Intermediate Fix
IFC — International Fire Code
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
ISO — International Organization for Standardization
ITI — Interactive Terminal Interface
IVRS — Interim Voice Response System
IW — Inside Wiring
Kbps — Kilobits Per Second
Khz — Kilohertz
KVDT — Keyboard Video Display Terminal
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
LAP — Landing Area Proposal
LATA — Local Access and Transport Area
LAWRS — Limited Aviation Weather Reporting System
LBA — Load-Bearing Area
LCF — Local Control Facility
LCN — Local Communications Network
LDA — Localizer Directional Aid
LDA — Landing Directional Aid
LDIN — Lead-- in Lights
LDR — Landing Distance Required
LEC — Local Exchange Carrier
LED — Light Emitting Diode
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
LOB — Line of Business
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
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
MCS — Megawatt Charging 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
Mhg — MegHERTZ
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
MTOW — Maximum Takefoff Weight
MUX — Multiplexor
MVA — Minimum Vectoring Altitude
MVFR — Marginal Visual Flight Rules
NAAQS — National Ambient Air Quality Standards
NADA — NADIN Concentrator
NADIN — National Airspace Data Interchange Network
NADSW — NADIN Switches
NAILS — National Airspace Integrated Logistics Support
NAMS — NADIN IA
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 — Navigational 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
NDNB — NADIN II
NEC — National Electric Code
NEM — Noise Exposure Map
NEMSPA — National EMS Pilots Association
NEPA — National Environmental Policy Act
NEXRAD — Next Generation Weather Radar
NFAX — National Facsimile Service
NFDC — National Flight Data Center
NFIS — NAS Facilities Information System
NFPA — National Fire Protection Association
NI — Network Interface
NICS — National Interfacility Communications System
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
NPE — Non-primary Airport Entitlement
NPIAS — National Plan of Integrated Airport Systems
NPRM — Notice of Proposed Rulemaking
NR — Non-Rulemaking; refers to a type of airport airspace analysis case
NRA — Non-Rulemaking Airport; refers to a type of airport airspace analysis case
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
OAG — Official Airline Guide
OALT — Operational Acceptable Level of Traffic
OAW — Off-- airway Weather Station
ODAL — Omnidirectional Approach Lighting System
ODAPS — Oceanic Display and Processing Station
OEI — One Engine Inoperative
OEM — Original Equipment Manufacturer
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
PABX — Private Automated Branch Exchange
PAD — Packet Assembler/Disassembler
PAL — Planning Activity Level
PAM — Peripheral Adapter Module
PAPI — Precision Approach Path Indicator
PAR — Precision Approach Radar
PAR — Preferential Arrival Route
PATWAS — Pilots Automatic Telephone Weather Answering Service
PBB — Passenger Boarding Bridge
PBCT — Proposed Boundary Crossing Time
PBRF — Pilot Briefing
PBX — Private Branch Exchange
PCA — Positive Control Airspace
PCC — Portland Cement Concrete
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
PIM — Preformed Thermoplastic Markings
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
QA — Quality Assurance
RA — Risk Assessment
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
RIWS — Runway Incursion Warning Systems
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
RTODR — Rejected Takeoff Distance Required
RTP — Regional Transportation Plan
RTR — Remote Transmitter/Receiver
RTRD — Remote Tower Radar Display
RTTF — Residential Through-the-Fence
RVR — Runway Visual Range
RW — Runway
RWDS — Same as RRWDS
RWP — Real-time Weather Processor
S/S — Sector Suite
SAC — Strategic Air Command
SAE — SAE International
SAFI — Semi Automatic Flight Inspection
SALS — Short Approach Lighting System
SAS — Safety Assessment Screening
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
SFAR-- 38 — 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 — Safety Risk Assessment
SRAP — Sensor Receiver and Processor
SRM — Safety Risk Management
SRMD — Safety Risk Management Document
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
T1MUX — T1 Multiplexer
TAAS — Terminal Advance Automation System
TAC — Technical Advisory Committee
TACAN — Tactical Aircraft Control and Navigation
TACR — TACAN at VOR, TACAN only
TAF — Terminal Area Forecast, Terminal Aerodrome 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
TDP — Takeoff Decision Point
TDPC — Touchdown/Positioning Circle
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
TLOF — Touchdown and Liftoff Area
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
TODR — Takefoff Distance Required
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
TSA — Transportation Security Administration
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)
TY — Type (FAACIS)
UAM — Urban Air Mobility
UAS — Uniform Accounting System
UHF — Ultra High Frequency
UL — Underwriters Laboratories
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
VALE — Voluntary Airport Low Emission
VASI — Visual Approach Slope Indicator
VDME — VOR with Distance Measuring Equipment
VF — Voice Frequency
VFR — Visual Flight Rules
VGSI — Visual Glideslope Indicator
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
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
WHA — Wildlife Hazard Assessment
WHMP — Wildlife Hazard Management Plan
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
ZEV — Zero Emissions Vehicle