B-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 system
B-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 Standards
B-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 point
B-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/pounds
B-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 rules