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  • #2 Gửi bởi lamgiang vào 04 May 2024

  • A/C—aircraft
    A/FD—airport/facility directory
    A/G—air to ground
    A/HA—altitude/height
    AAF—Army Air Field
    AAI —arrival aircraft interval
    AAP—advanced automation program
    AAR—airport acceptance rate
    ABDIS—Automated Data Interchange System Service B
    ABN—aerodrome beacon
    ABV—above
    ACAIS—air carrier activity information system
    ACAS—aircraft collision avoidance system
    ACC—area control center; Airports Consultants Council
    ACCT—accounting records
    ACCUM—accumulate
    ACD—Automatic Call Distributor
    ACDO—Air Carrier District Office
    ACF—Area Control Facility
    ACFO—Aircraft Certification Field Office
    ACFT—aircraft
    ACID—aircraft identification
    ACI-NA—Airports Council International-North America
    ACIP—airport capital improvement plan
    ACLS—automatic carrier landing system
    ACLT—actual landing time calculated
    ACO—Office of Airports Compliance and Field Operations;
    Aircraft Certification Office
    ACR—air carrier
    ACRP—Airport Cooperative Research Program
    ACS—Airman Certification Standard
    ACT—active, activated, or activity
    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
    Acronyms, Abbreviations, and
    NOTAM Contractions
    Appendix B
    ADIN—AUTODIN service
    ADIZ—air defense identification zone
    ADJ—adjacent
    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
    ADZD—advised
    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
    AGIS—airports geographic information system
    AGL—above ground level
    AID—airport information desk
    AIG—Airbus Industries Group
    AIM—Airman’s Information Manual
    AlP—airport improvement plan
    AIRMET—Airmen’s Meteorological Information
    AIRNET—Airport Network Simulation Model
    AIS—aeronautical lnformation service
    AlT—automated information transfer
    ALP—airport layout plan
    This is a list of common acronyms and abbreviations used in the aviation industry as well as NOTAM contractions. For
    a more complete list of contractions used in aviation, see FAA Order JO 7340.2 (as amended). Additional information
    regarding NOTAMs can be found at pilotweb.nas.faa.gov/PilotWeb/.B-2
    ALS—approach light system
    ALSFl—ALS with sequenced flashers I
    ALSF2—ALS with sequenced flashers II
    ALSIP—Approach Lighting System Improvement Plan
    ALSTG—altimeter setting
    ALT—altitude
    ALTM—altimeter
    ALTN—alternate
    ALTNLY—alternately
    ALTRV—altitude reservation
    AMASS—airport movement area safety system
    AMCC—ADF/ARTCC Maintenance Control Center
    AMDT—amendment
    AMGR—Airport Manager
    AMOS—Automatic meteorological observing system
    AMP—ARINC Message Processor; 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—airport; acquisition plan
    APCH—approach
    APL—airport lights
    APP—approach; approach control; Approach Control Office
    APS—airport planning standard
    AQAFO—Aeronautical Quality Assurance Field Office
    ARAC—Army Radar Approach Control (AAF); 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
    ARR—arrive; arrival
    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
    ASOS—automated surface observing system
    ASP—arrival sequencing program
    ASPH—asphalt
    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
    ATC—air traffic control
    ATCAA—air traffic control assigned airspace
    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 System Command Center
    ATCT—airport traffic control tower
    ATIS—automatic terminal information service
    ATISR—ATIS recorder
    ATM—air traffic management; asynchronous transfer mode
    ATMS—advanced traffic management system
    ATN—Aeronautical Telecommunications Network
    ATODN—AUTODIN terminal (FUS)
    ATOMS—air traffic operations management system
    ATOVN—AUOTVON (facility)
    ATS—air traffic service
    ATSCCP—ATS contingency command post
    AUTH—authority
    AUTOB—automatic weather reporting system
    AUTODIN—DoD Automatic Digital Network
    AUTOVON—DoD Automatic Voice Network
    AVBL—available
    AVN—Aviation Standards National Field Office, Oklahoma
    City
    AVON—AUTOVON service
    AWlS—airport weather information
    AWOS—automatic weather; observing/reporting system
    AWP—Aviation Weather Processor
    AWPG—aviation weather products generator
    AWS—air weather station
    AWY—airway
    AZM—azimuth
    B
    BA FAIR—braking action fair
    BA NIL—braking action nil
    BA POOR—braking action poor
    BANS—BRITE alphanumeric system
    BART—billing analysis reporting tool (GSA software tool)
    BASIC—basic contract observing station
    BASOP—military base operationsB-3
    BC—back course
    BCA—benefit/cost analysis
    BCN—beacon
    BCR—benefit/cost ratio
    BDAT—digitized beacon data
    BERM—snowbank(s) containing earth/gravel
    BLW—below
    BMP—best management practices
    BND—bound
    BOC—Bell Operating Company
    bps—bits per second
    BRG—bearing
    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
    BYD—beyond
    C
    C/S/S/N—capacity/safety/security/noise
    CAA—civil aviation authority; Clean Air Act
    CAAS—Class A Airspace
    CAB—civil aeronautics board
    CARF—Central Altitude Reservation Facility
    CASFO—Civil Aviation Security Office
    CAT—category; clear-air turbulence
    CAU—Crypto Ancillary Unit
    CBAS—Class B airspace
    CBI—computer based instruction
    CBSA—Class B surface area
    CC&O—customer cost and obligation
    CCAS—Class C Airspace
    CCC—Communications Command Center
    CCCC—staff communications
    CCCH—central computer complex host
    CCLKWS—counterclockwise
    CCS7-NI—Communication Channel Signal-7-Network
    Interconnect
    CCSA—Class C surface area
    CCSD—Command Communications Service Designator
    CCU—Central Control Unit
    CD—clearance delivery; common digitizer
    CDAS—Class D Airspace
    CDR—cost detail report
    CDSA—Class D surface area
    CDT—controlled departure time
    CDTI—cockpit display of traffic information
    CEAS—Class E Airspace
    CENTX—central telephone exchange
    CEP—capacity enhancement program
    CEQ—council on environmental quality
    CERAP—center radar approach control; combined center
    radar approach control
    CESA—Class E surface area
    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—Class G Airspace; Coast Guard Air Station
    CHG—change
    CIG—ceiling
    CK—check
    CL—centerline
    CLC—course line computer
    CLIN—contract line item
    CLKWS—clockwise
    CLR—clearance, clear(s), cleared to
    CLSD—closed
    CLT—calculated landing time
    CM—commercial service airport
    CMB—climb
    CMSND—commissioned
    CNL—cancel
    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
    COM—communications
    COMCO—command communications outlet
    CONC—concrete
    CONUS—Continental United States
    CORP—private corporation other than ARINC or MITRE
    CPD—coupled
    CPE—customer premise equipment
    CPMIS—consolidated personnel management information
    system
    CRA—conflict resolution advisory
    CRDA—converging runway display aid
    CRS—course
    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
    CTA—controlled time of arrival; control area
    CTA/FIR—control area/flight information region
    CTAF—common traffic advisory frequency
    CTAS—center-TRACON automation systemB-4
    CTC—contact
    CTL—control
    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
    DA—direct access; decision altitude/decision height;
    Descent Advisor
    DABBS—DITCO automated bulletin board system
    DAIR—direct altitude and identity readout
    DALGT—daylight
    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—database 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
    DCMSND—decommissioned
    DCT—direct
    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
    DEGS—degrees
    DEIS—Draft Environmental Impact Statement
    DEP—depart/departure
    DEPPROC—departure procedures
    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
    DISABLD—disabled
    DIST—distance
    DITCO—Defense Information Technology Contracting
    Office Agency
    DLA—delay or delayed
    DLT—delete
    DLY—daily
    DME—distance measuring equipment
    DME/P—precision distance measuring equipment
    DMN—Data Multiplexing Network
    DMSTN—demonstration
    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
    DOTCC—Department of Transportation Computer Center
    DOTS—dynamic ocean tracking system
    DP—dew point temperature
    DRFT—snowbank(s) caused by wind action
    DSCS—digital satellite compression service
    DSPLCD—displaced
    DSUA—dynamic special use airspace
    DTS—dedicated transmission service
    DUAT—direct user access terminal
    DVFR—defense visual flight rules; day visual flight rules
    DVOR—doppler very high frequency omni-directional range
    DYSIM—dynamic simulator
    E
    E—east
    EA—environmental assessment
    EARTS—en route automated radar tracking system
    EB—eastbound
    ECOM—en route communications
    ECVFP—expanded charted visual flight procedures
    EDCT—expedite departure path
    EFC—expect further clearance
    EFIS—electronic flight information systems
    EIAF—expanded inward access features
    EIS—environmental impact statement
    ELEV—elevation
    ELT—emergency locator transmitter
    ELWRT—electrowriter
    EMAS—engineered materials arresting system
    EMPS—en route maintenance processor system
    EMS—environmental management system
    E-MSAW—en route automated minimum safe altitude
    warning
    ENAV—en route navigational aids
    ENG—engine
    ENRT—en route
    ENTR—entire
    EOF—emergency Operating Facility
    EPA—Environmental Protection Agency
    EPS—Engineered Performance StandardsB-5
    EPSS—enhanced packet switched service
    ERAD—en route broadband radar
    ESEC—en route broadband secondary radar
    ESF—extended superframe format
    ESP—en route spacing program
    ESYS—en route equipment systems
    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
    EXC—except
    F
    F&E—facility and equipment
    FAA—Federal Aviation Administration
    FAAAC—FAA aeronautical center
    FAACIS—FAA communications information system
    FAATC—FAA technical center
    FAATSAT—FAA telecommunications satellite
    FAC—facility/facilities
    FAF—final approach fix
    FAN—MKR fan marker
    FAP—final approach point
    FAPM—FTS2000 associate program manager
    FAR—Federal Aviation Regulation
    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
    FDC—flight data center
    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
    FI/P—flight inspection permanent
    FI/T—flight inspection temporary
    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
    FM—from
    FMA—final monitor aid
    FMF—facility master file
    FMIS—FTS2000 management information system
    FMS—flight management system
    FNA—final approach
    FNMS—FTS2000 network management system
    FOIA—Freedom Of Information Act
    FONSI—finding of no significant impact
    FP—flight plan
    FPM—feet per minute
    FRC—request full route clearance
    FREQ—frequency
    FRH—fly runway heading
    FRI—Friday
    FRZN—frozen
    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
    FT—feet/foot
    FTS2000—Federal Telecommunications System 2000
    FUS—functional units or systems
    FWCS—flight watch control station
    G
    GA—general aviation
    GAA—general aviation activity
    GAAA—general aviation activity and avionics
    GADO—General Aviation District Office
    GC—ground control
    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 pointB-6
    GOEST—GOES terminal equipment
    GOVT—government
    GP—glide path
    GPRA—Government Performance Results Act
    GPS—global positioning system
    GPWS—ground proximity warning system
    GRADE—graphical airspace design environment
    GRVL—gravel
    GS—glide slope indicator
    GSA—General Services Administration
    GSE—ground support equipment
    H
    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
    HDG—heading
    HDME—NDB with distance measuring equipment
    HDQ—FAA headquarters
    HEL—helicopter
    HELI—heliport
    HF—high frequency
    HH—NDB, 2kw or more
    HI-EFAS—high altitude EFAS
    HIRL—high intensity runway lights
    HIWAS—Hazardous lnflight Weather Advisory Service
    HLDC—high level data link control
    HLDG—holding
    HOL—holiday
    HOV—high occupancy vehicle
    HP—holding pattern
    HR—hour
    HSI—horizontal situation indicators
    HUD—housing and urban development
    HWAS—hazardous in-flight weather advisory
    Hz—Hertz
    I
    I/AFSS—international AFSS
    IA—indirect access
    IAF—initial approach fix
    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
    ID—identification
    IDAT—interfacility data
    IDENT—identify/identifier/identification
    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
    IN—inch/inches
    INBD—inbound
    INDEFLY—indefinitely
    INFO—information
    INM—integrated noise model
    INOP—inoperative
    INS—inertial navigation system
    INSTR—instrument
    INT—intersection
    INTL—international
    INTST—intensity
    IR—ice on runway(s)
    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
    Kbps—Kilobits per second
    Khz—Kilohertz
    KT—knots
    KVDT—keyboard video display terminal
    L
    L—left
    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
    LAT—latitude
    LATA—local access and transport area
    LAWRS—limited aviation weather reporting station
    LB—pound/poundsB-7
    LC—local control
    LCF—local control facility
    LCN—local communications network
    LCTD—located
    LDA—localizer-type directional aid; landing directional aid
    LDG—landing
    LDIN—lead-in lights
    LEC—local exchange carrier
    LF—low frequency
    LGT—light or lighting
    LGTD—lighted
    LINCS—leased interfacility NAS C
    LIRL—low intensity runway lights
    LIS—logistics and inventory system
    LLWAS—low level wind shear alert system
    LLZ—localizer
    LM—compass locator at ILS middle marker
    LM/MS—low/medium frequency
    LMM—locator middle marker
    LO—compass locator at ILS outer marker
    LOC—local; locally; location; localizer
    LOCID—location identifier
    LOI—letter of intent
    LOM—compass locator at outer marker
    LONG—longitude
    LPV—lateral precision performance with vertical guidance
    LRCO—limited remote communications outlet
    LRNAV—long range navigation
    LRR—long range radar
    LSR—loose snow on runway(s)
    LT—left turn
    M
    MAA—maximum authorized altitude
    MAG—magnetic
    MAINT—maintain, maintenance
    MALS—medium intensity approach light system
    MALSF—medium intensity approach light system with
    sequenced flashers
    MALSR—medium intensity approach light system with
    runway alignment indicator lights
    MAP—maintenance automation program; military airport
    program; missed approach point; modified access pricing
    MAPT—missed approach point
    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
    MED—medium
    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
    MIN—minute
    MIRL—medium intensity runway lights
    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
    MMAC—Mike Monroney Aeronautical Center
    MMC—maintenance monitoring console
    MMS—maintenance monitoring system
    MNM—minimum
    MNPS—minimum navigation performance specification
    MNPSA—minimum navigation performance specifications
    airspace
    MNT—monitor; monitoring; monitored
    MOA—memorandum of agreement; military operations area
    MOC—minimum obstruction clearance
    MOCA—minimum obstruction clearance altitude
    MODE C—altitude-encoded beacon reply; altitude reporting
    mode of secondary radar
    MODE S—mode select beacon system
    MON—Monday
    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; minimum sector altitude
    MSAW—minimum safe altitude warning
    MSG—message
    MSL—mean sea level
    MSN—message switching network
    MTCS—modular terminal communications system
    MTI—moving target indicator
    MU—mu meters
    MUD—mud
    MUNI—municipal
    MUX—multiplexor
    MVA—minimum vectoring altitude
    MVFR—marginal visual flight rulesB-8
    N
    N—north
    NA—not authorized
    NAAQS—national ambient air quality standards
    NADA—ADIN 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
    NAV—navigation
    NAVAID—navigation aid
    NAVMN—navigation monitor and control
    NAWAU—National Aviation Weather Advisory Unit
    NAWPF—National Aviation Weather Processing Facility
    NB—northbound
    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 beacon
    NDNB—NADIN II
    NE—northeast
    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
    NGT—night
    NI—network interface
    NICS—national interfacility communications system
    NM—nautical mile(s)
    NMAC—near mid-air collision
    NMC—National Meteorological Center
    NMCE—network monitoring and control equipment
    NMCS—network monitoring and control system
    NMR—nautical mile radius
    NOAA—National Oceanic and Atmospheric Administration
    NOC—notice of completion
    NONSTD—nonstandard
    NOPT—no procedure turn required
    NOTAM—notice to airmen
    NPDES—National pollutant discharge elimination system
    NPE—non-primary airport entitlement
    NPIAS—national plan of integrated airport systems
    NR—number
    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
    NSWRH—NWS Regional Headquarters
    NTAP—Notices To Airmen Publication
    NTP—National Transportation Policy
    NTSB—National Transportation Safety Board
    NTZ—no transgression zone
    NW—northwest
    NWS—National Weather Service
    NWSR—NWS weather excluding NXRD
    NXRD—advanced weather radar system
    O
    OAG—official airline guide
    OALT—operational acceptable level of traffic
    OAW—off-airway weather station
    OBSC—obscured
    OBST—obstruction
    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
    OPR—operate
    OPS—operation
    OPSW—operational switch
    OPX—off premises exchange
    ORD—operational readiness demonstration
    ORIG—original
    OTR—oceanic transition route
    OTS—out of service; organized track system
    OVR—over
    P
    PABX—private automated branch exchange
    PAD—packet assembler/disassembler
    PAEW—personnel and equipment working
    PAM—peripheral adapter module
    PAPI—precision approach path indicator
    PAR—precision approach radar; preferential arrival routeB-9
    PARL—parallel
    PAT—pattern
    PATWAS—Pilots Automatic Telephone Weather Answering
    Service
    PAX—passenger
    PBCT—proposed boundary crossing time
    PBRF—pilot briefing
    PBX—private branch exchange
    PCA—positive control airspace
    PCL—pilot controlled lighting
    PCM—pulse code modulation
    PD—Pilot Deviation
    PDAR—preferential arrival and departure route
    PDC—pre-departure clearance; program designator code
    PDN—Public Data Network
    PDR—preferential departure route
    PERM—permanent/permanently
    PFC—passenger facility charge
    PGP—planning grant program
    PIC—principal interexchange carrier
    PIDP—programmable indicator data processor
    PIREP—pilot weather report
    PJE—parachute jumping exercise
    PLA—practice low approach
    PLW—plow/plowed
    PMS—program management system
    PNR—prior notice required
    POLIC—police station
    POP—point of presence
    POT—point of termination
    PPIMS—personal property information management system
    PPR—prior permission required
    PR—primary commercial service airport
    PREV—previous
    PRI—primary rate interface
    PRM—precision runway monitor
    PRN—pseudo random noise
    PROC—procedure
    PROP—propeller
    PSDN—public switched data network
    PSN—packet switched network
    PSR —packed snow on runway(s)
    PSS—packet switched service
    PSTN—public switched telephone network
    PTC—presumed-to-conform
    PTCHY—patchy
    PTN—procedure turn
    PUB—publication
    PUP—principal user processor
    PVC—permanent virtual circuit
    PVD—plan view display
    PVT—private
    R
    RAIL—runway alignment indicator lights
    RAMOS—remote automatic meteorological observing
    system
    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 facility
    RCC—Rescue Coordination Center
    RCCC—Regional Communications Control Centers
    RCF—Remote Communication Facility
    RCIU— Remote Control Interface Unit
    RCL— runway centerline; radio communications link
    RCLL—runway centerline light system
    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
    REC—receive/receiver
    REIL—runway end identifier lights
    RELCTD—relocated
    REP—report
    RF—radio frequency
    RL—General Aviation Reliever Airport
    RLLS—runway lead-in lights system
    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
    RMNDR—remainder
    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
    RPLC—replaceB-10
    RPZ—runway protection zone
    RQRD—required
    RRH—remote reading hygrothermometer
    RRHS—remote reading hydrometer
    RRL—runway remaining lights
    RRWDS—remote radar weather display
    RRWSS—RWDS sensor site
    RSA—runway safety area
    RSAT—runway safety action team
    RSR—en route surveillance radar
    RSS—remote speaking system
    RSVN—reservation
    RT—right turn; remote transmitter
    RT & BTL—radar tracking and beacon tracking level
    RTAD—remote tower alphanumerics display
    RTCA—Radio Technical Commission for Aeronautics
    RTE—route
    RTP—regional transportation plan
    RTR—remote transmitter/receiver
    RTRD—remote tower radar display
    RTS—return to service
    RUF—rough
    RVR—runway visual range
    RVRM—runway visual range midpoint
    RVRR—runway visual range rollout
    RVRT—runway visual range touchdown
    RW—runway
    RWDS—same as RRWDS
    RWP—real-time weather processor
    RWY—runway
    S
    S—south
    S/S—sector suite
    SA—sand, sanded
    SAC—Strategic Air Command
    SAFI—semi-automatic flight inspection
    SALS—short approach lighting system
    SAT—Saturday
    SATCOM—satellite communications
    SAWR—Supplementary Aviation Weather Reporting Station
    SAWRS—Supplementary Aviation Weather Reporting
    System
    SB—southbound
    SBGP—state block grant program
    SCC—System Command Center
    SCVTS—Switched Compressed Video Telecommunications
    Service
    SDF—simplified directional facility; simplified direction
    finding; software defined network
    SDIS—switched digital integrated service
    SDP—service delivery point
    SD-ROB—radar weather report
    SDS—switched data service
    SE—southeast
    SEL—single event level
    SELF—simplified short approach lighting system with
    sequenced flashing lights
    SFAR-38—Special Federal Aviation Regulation 38
    SFL—sequence flashing lights
    SHPO—State Historic Preservation Officer
    SIC—service initiation charge
    SID— standard instrument departure; station identifier
    SIGMET—significant meteorological information
    SIMMOD—airport and airspace simulation model
    SIMUL—simultaneous
    SIP—state implementation plan
    SIR—packed or compacted snow and ice on runway(s)
    SKED—scheduled
    SLR—slush on runway(s)
    SM—statute miles
    SMGC—surface movement guidance and control
    SMPS—sector maintenance processor subsystem
    SMS—safety management system; simulation modeling
    system
    SN—snow
    SNBNK—snowbank(s) caused by plowing
    SNGL—single
    SNR—signal-to-noise ratio, also: S/N
    SOAR—system of airports reporting
    SOC—service oversight center
    SOIR—simultaneous operations on intersecting runways
    SOIWR—simultaneous operations on intersecting wet
    runways
    SPD—speed
    SRAP—sensor receiver and processor
    SSALF—simplified short approach lighting system with
    sequenced flashers
    SSALR—simplified short approach lighting system with
    runway alignment indicator lights
    SSALS—simplified short approach lighting system
    SSB—single side band
    SSR—secondary surveillance radar
    STA—straight-in approach
    STAR—standard terminal arrival route
    STD—standard
    STMUX—statistical data multiplexer
    STOL—short takeoff and landing
    SUN—Sunday
    SURPIC—surface picture
    SVC—service
    SVCA—service A
    SVCB—service B
    SVCC—service CB-11
    SVCO—service O
    SVFB—interphone service F (B)
    SVFC—interphone service F (C)
    SVFD—interphone service F (D)
    SVFO—interphone service F (A)
    SVFR—special visual flight rules
    SW—southwest
    SWEPT—swept or broom/broomed
    T
    T—temperature
    T1MUX—T1 multiplexer
    TAA—terminal arrival area
    TAAS—terminal advance automation system
    TACAN—tactical air navigation
    TACR—TACAN at VOR, TACAN only
    TAF—terminal area forecast
    TAR—terminal area surveillance radar
    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;
    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
    TDZ—touchdown zone
    TDZ LG—touchdown zone lights
    TELCO—telephone company
    TELMS—telecommunications management system
    TEMPO—temporary
    TERPS—terminal instrument procedures
    TFAC—to facility
    TFC—traffic
    TFR—temporary flight restriction
    TGL—touch-and-go landings
    TH—threshold
    THN—thin
    THR—threshold
    THRU—through
    THU—Thursday
    TIL—until
    TIMS—telecommunications information management system
    TIPS—terminal information processing system
    TKOF—takeoff
    TL—taxilane
    TM—traffic management
    TM&O—telecommunications management and operations
    TMA—Traffic Management Advisor
    TMC—Traffic Management Coordinator
    TMC/MC—Traffic Management Coordinator/Military
    Coordinator
    TMCC—terminal information processing system; 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
    TMP—Traffic Management Processor
    TMPA—traffic management program alert
    TMS—traffic management system
    TMSPS—traffic management specialists
    TMU—traffic management unit
    TNAV—terminal navigational aids
    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
    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
    TRML—terminal
    TRNG—training
    TRSN—transition
    TSA—taxiway safety area; Transportation Security
    Administration
    TSEC—terminal secondary radar service
    TSNT—transient
    TSP—telecommunications service priority
    TSR—telecommunications service request
    TSYS—terminal equipment systems
    TTMA—TRACON Traffic Management Advisor
    TTY—teletype
    TUE—Tuesday
    TVOR—terminal VHF omnidirectional range
    TW—taxiway
    TWEB—transcribed weather broadcast
    TWR—tower
    TWY—taxiway
    TY—type (FAACIS)B-12
    U
    UAS—unmanned aircraft systems
    UFN—until further notice
    UHF—ultra high frequency
    UNAVBL—unavailable
    UNLGTD—unlighted
    UNMKD—unmarked
    UNMNT—unmonitored
    UNREL—unreliable
    UNUSBL—unusable
    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
    V/PD—Vehicle/pedestrian deviation
    VALE—voluntary airport low emission
    VASI—visual approach slope indicator
    VDME—VOR with distance measuring equipment
    VDP—visual descent point
    VF—voice frequency
    VFR—visual flight rules
    VGSI—visual glide slope indicator
    VHF—very high frequency
    VIA—by way of
    VICE—instead/versus
    VIS—visibility
    VLF—very low frequency
    VMC—visual meteorological conditions
    VNAV—visual navigational aids
    VNTSC—Volpe National Transportation System Center
    VOL—volume
    VON—virtual on-net
    VOR—VHF omnidirectional range
    VOR/DME—VHF omnidirectional range/distance
    measuring equipment
    VORTAC—VOR and TACAN (collocated)
    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 and TACAN (collocated)
    VTOL—vertical takeoff and landing
    VTS—voice telecommunications system
    W
    W—west
    WAAS—Wide Area Augmentation System
    WAN—wide area network
    WB—westbound
    WC—work center
    WCP—Weather Communications Processor
    WECO—Western Electric Company
    WED—Wednesday
    WEF—with effect from; effective from
    WESCOM—Western Electric Satellite Communications
    WI—within
    WIE—with immediate effect, or effective immediately
    WKDAYS—Monday through Friday
    WKEND—Saturday and Sunday
    WMSC—Weather Message Switching Center
    WMSCR—Weather Message Switching Center Replacement
    WND—wind
    WPT—waypoint
    WSCMO—Weather Service Contract Meteorological
    Observatory
    WSFO—Weather Service Forecast Office
    WSMO—Weather Service Meteorological Observatory
    WSO—Weather Service Office
    WSR—wet snow on runway(s)
    WTHR—weather
    WTR—water on runway(s)
    WX—weather

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