B-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 route
B-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—replace
B-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 C
B-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