[ A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z ]
A
AAS -Airport Advisory Service
AC -convective outlook
ADF -automatic direction finder
ADIZ -air defense identification zone
ADM -aeronautical decision making
AFSS -automated flight service station
AIRMET -airmen’s meteorological information
ALS -approach light system
ALSF -ALS with sequenced flashers
ALTN -alternate
AM -amplitude modulation
AMA -area minimum altitude
AME -aviation medical examiner
APP -approach (also AP)
APP CON-approach control (also APC)
ARINC -Aeronautical Radio, Inc.
ARP -airport reference point
ARSA -airport radar service area
ARSR -air route surveillance radar
ARTCC -air route traffic control center
ARTS -automated radar terminal system
ASR -airport surveillance radar
ATC -Air Traffic Control
ATCRBS -ATC radar beacon system
ATIS -automatic terminal information service
AWOS -automated weather observation system
AWW -severe weather forecast alert
B
BC -back course
BCN -beacon
BRG -bearing
C
CAS -calibrated airspeed
CAT -clear air turbulence
CAT -category
CCA -continental control area
CDI -course deviation indicator
CEIL -ceiling (also CIG)
Cl -coefficient of lift
Clmax -coefficient of lift maximum
CLNC -clearance
CLNC DEL- clearance delivery
COP -change-over point
CP -center of pressure
CRM -cockpit resource management
CRP -compulsory reporting point
CRS -course
CTAF -common traffic advisory frequency
CTLZ -control zone
CWA -center weather advisories
D
DA -density altitude
DA(H) -decision altitude (height)
DEP -departure (also DP)
DEP CON-departure control (also DPC)
DEWIZ -distant early warning identification zone
DH -decision height
DME -distance measuring equipment
DQD -Department of Defense
DOT -Department of Transportation
DUAT -direct user access terminal
E
EAS -equivalent airspeed
EFAS -enroute flight advisory service (Flight Watch)
EFC -expect further clearance
EGT -exhaust gas temperature
F
FA -area forecast
FAC -final approach course
FAF -final approach fix
FD -wind and temperatures aloft forecast
FDC -Flight Data Center
FIR -Flight Information Region
FL -flight level
FLIP -Flight Information Publication
FT -terminal forecast
G
GCA -ground controlled approach
GS -glideslope (also groundspeed)
GSIP -glideslope intercept point
H
HAA -height above airport
HAT -height above touchdown
HIRL -high intensity runway lights
HSl -horizontal situation indicator
HVOR -high altitude VOR
I
IAC -instrument approach chart
IAF -initial approach fix
IAP -instrument approach procedure
IAS -indicated airspeed
ICAO -International Civil Aviation Organization
IF -intermediate fix
IFR -instrument flight rules
ILS -instrument landing system
IM -inner marker
IMC -instrument meteorological conditions
INS -inertial navigation system
INT -intersection
IR -IFR military training route
ISA -International Standard Atmosphere
IVRS -Interim Uoice Response System
IVSI -instantaneous vertical speed indicator
J
J-AID -Jeppesen Airport and Information Directory
K
KIAS -knots indicated airspeed
KTAS -knots true airspeed
L
LCL -local
LDA -localizer-type directional aid
LDI -landing direction indicator
LDIN -lead-in light system
LIFR -low IFR
LIM -locator inner marker
LIRL -low intensity runway lights
LLWAS -low-level wind shear alert system
LMM -locator middle marker
LOC -localizer
LOM -locator outer marker
LORAN -long range navigation
LR -lead radial
LT -local time
LVOR -low altitude VOR
M
MAA -maximum authorized altitude
MAC -mean aerodynamic chord
MALS -medium intensity approach light system
MALSF -MALS with sequenced flashers
MALSR -MALS with RAIL
MAP -missed approach point
MAP -manifold absolute pressure
MCA -minimum crossing altitude
MDA(H) -minimum descent altitude (height)
MDH -minimum descent height
MEA -minimum enroute altitude
MF -medium frequency
MHA -minimum holding altitude
MIRL -medium intensity runway lights
MKR -marker
MLS -microwave landing system
MM -middle marker
MOA -military operations area
MOCA -minimum obstruction clearance altitude
MRA -minimum reception altitude
MSA -minimum safe altitude
MSAW -minimum safe altitude warning
MTR -military training route
MVA -minimum vectoring altitude
MVFR -marginal VFR
N
NA -not authorized
NAR -North American Route (also refers to North Atlantic Route)
NASA -National Aeronautics and Space Administration
NAWAU -National Aviation Weather Advisory Unit
NDB -nondirectional beacon/radio beacon
NMC -National Meteorological Center
NOAA -National Oceanic and Atmospheric Administration
NoPT -no procedure turn
NORDO -no radio
NOS -National Ocean Service
NOTAM -Notice to Airmen
NSSFC -National Severe Storms Forecast Center
NTSB -National Transportation Safety Board
NWS -National Weather Service
O
OBS -omnibearing selector
ODALS -omnidirectional approach light system
OM -outer marker
OTS -out of service
P
PA -pressure altitude
PAPI -precision approach path indicator
PAR -precision approach radar
PATWAS -pilot’s automatic telephone weather answering service
PCA -positive control area
PCL -pilot controlled lighting
PIREP -pilot report
PPR -prior permission required
PT -procedure turn
PTS -practical test standard
Q
R
R -radial
RA -radio altimeter
RADAR -radio detection and ranging
RADAT -freezing level data
RAIL -runway alignment indicator lights
RAPCON -radar approach control (USAF)
RAREP -radar weather report
RB -relative bearing
RCAG -remote communications air/ground facility
RCLS -runway centerline light system
RCO -remote communications outlet
REIL -runway end identifier lights
RMI -radio magnetic indicator
RMK -remark
RNAV -area navigation
RRL -runway remaining lights
RRWDS -radar remote weather display system
RS -record special
RSC -runway surface condition
RTS -return to service
RVR -runway visual range
RVV -runway visibility value
rwy -runway
S
SA -surface aviation weather report
SALS -short approach light system
SAR -search and rescue
SCATANA-Security Control of Air Traffic and Air Navigation Aids
SDF -simplified directional facility
SFL -sequenced flashing lights
SID -standard instrument departure
SIGMET -significant meteorological information
SP -special report
SQ -squawk
SSALS -simplified SALS
SSALSF -SSALS with SFL
SSALSR -SSALS with RAIL
SSV -standard service volume
STAR -standard terminal arrival route
STBY -standby
STC -sensitivity time control
T
TA -transition altitude
TACAN -tactical air navigation
TAS -true airspeed
TCA -terminal control area
TCH -threshold crossing height
TDZ -touchdown zone
TDZ/CL -touchdown zone and runway centerline lighting
TDZE -touchdown zone elevation
TDZL -touchdown zone lights
TEC -tower enroute control
TEL-TWEB- telephone access to TWEB
TERPS -U.S. Standard for Terminal Instrument Procedures
TIBS -telephone information briefing service
TLv -transition level (also TL)
TPA -traffic pattern altitude
TRACON -terminal radar approach control
TRSA -terminal radar service area
TVOR -terminal VOR
TWEB -transcribed weather broadcast
U
UA -pilot report (PIREP) message identifier
UFN -until further notice
UNICOM -aeronautical advisory station
UTC -Coordinated Universal Time (Zulu time)
V
V-speeds -performance speeds
VASI -visual approach slope indicator
VDP -visual descent point
VFR -visual flight rules
VIS -visibility
VMC -visual meteorological conditions
VOR -VHF omnidirectional radio range
VOR/DME-collocated VOR and DME navaids
VORTAC -collocated VOR and TACAN navaids
VOT -VOR test facility
VR -VFR military training route
VRS -voice response system
VSI -vertical speed indicator
VVI -vertical velocity indicator
W
WA -AIRMET message identifier
WMSC -Weather Message Switching Center
WPT -waypoint
WS -SIGMET message identifier
WSFO -Weather Service Forecast Office
WSO -Weather Service Office
WST -convective SIGMET message identifier
WW -severe weather watch bulletin
WX -weather
X
Y
Z
Z -Zulu time (UTC)
