|
Contraction
|
Definition
|
Usage
|
|
T
|
Temperature
|
ICAO
|
|
T
|
trace (weather reports only)
|
NWS
|
|
T
|
training
|
GEN
|
|
T
|
tropical (air mass)
|
NWS
|
|
T
|
true (bearing)
|
GEN
|
|
T/R
|
transportation request
|
GEN
|
|
TA
|
temperature (PIREP only)
|
ATC
|
|
TA
|
total aboard
|
GEN
|
|
TA
|
transition altitude
|
ICAO
|
|
TAC
|
terminal area chart
|
GEN
|
|
TACAN
|
tactical air navigational aid
|
ICAO
|
|
TACLO
|
tactical air command liaison officer
|
GEN
|
|
TACR
|
tactical air navigation
|
GEN
|
|
TAD
|
ATC tower, approach and departure
control facility
|
ATC
|
|
TAF
|
aerodrome forecast
|
ICAO
|
|
TAF
|
terminal forecast
|
METAR
|
|
TAIL
|
tail wind
|
ICAO
|
|
TAND
|
tandum
|
GEN
|
|
TANDA
|
time and attendance report
|
GEN
|
|
TAO
|
TACAN only
|
ATC
|
|
TAO
|
time and altitude over
|
ATC
|
|
TAPER
|
temporary appointment pending
establishment of a register
|
GEN
|
|
TAR
|
terminal area surveillance radar
|
ICAO
|
|
TARND
|
turn around
|
ATC
|
|
TARS
|
terminal automated radar services
|
GEN
|
|
TARS
|
Tethered Aerostat Radar System
|
GEN
|
|
TAS
|
true air speed
|
GEN
|
|
TASR
|
terminal area surveillance radar
|
GEN
|
|
TAWOG
|
travel arrangements without
government expense
|
GEN
|
|
TB
|
turbulence (PIREP only)
|
ATC
|
|
TBJT
|
turbojet
|
GEN
|
|
TC
|
time check
|
ATC
|
|
TC
|
tropical cyclone
|
ICAO
|
|
TCA
|
terminal control area
|
GEN
|
|
TCA
|
tactical customer advocate
|
ATC
|
|
TCAS
|
traffic alert and collision avoidance
system
|
GEN
|
|
TCH
|
threshold crossing height
|
GEN
|
|
TCHD
|
threshold crossing height downwind
|
GEN
|
|
TCHU
|
threshold crossing height upwind
|
GEN
|
|
TCNTL
|
transcontinental
|
GEN
|
|
TCOM
|
terminal communications
|
GEN
|
|
TCP
|
transfer of control point
|
ATC
|
|
TCU
|
towering cumulus
|
NWS
|
|
TD
|
Touchdown
|
ATC
|
|
TD
|
transmitter distributor
|
GEN
|
|
TDA
|
Today
|
GEN
|
|
TDEL
|
time delay
|
GEN
|
|
TDLS
|
Terminal Data Link System
|
GEN
|
|
TDO
|
Tornado
|
ICAO
|
|
TDOP
|
Time Dilution of Precision
|
ATC
|
|
TDWR
|
Terminal Doppler Weather Radar
|
ATC
|
|
TDY
|
temporary duty
|
GEN
|
|
TDZ
|
touchdown zone
|
ICAO
|
|
TDZE
|
touchdown zone elevation
|
ATC
|
|
TDZL
|
touchdown zone light (system)
|
GEN
|
|
TEC
|
tower en route control
|
ATC
|
|
TECA
|
tower en route control area
|
ATC
|
|
TECR
|
technical reason
|
ICAO
|
|
TEL
|
telecommunications
|
GEN
|
|
TEL
|
Telephone
|
ICAO
|
|
TELAU
|
Teleautograph
|
GEN
|
|
TELCO
|
telephone company
|
GEN
|
|
TELCON
|
telephone conference
|
GEN
|
|
TELEX
|
telephone exchange
|
GEN
|
|
TELRY
|
telegraph reply
|
GEN
|
|
TEMP
|
Temperature
|
GEN
|
|
TEMPO
|
temporary
|
ICAO
|
|
TEND
|
Trend
|
ICAO
|
|
TERPS
|
terminal instrument procedures
|
GEN
|
|
TET
|
Tetrahedron
|
GEN
|
|
TF
|
terrain following
|
GEN
|
|
TFC
|
traffic
|
ICAO
|
|
TFMS
|
Traffic Flow Management System
|
ATC
|
|
TFR
|
temporary flight restriction
|
GEN
|
|
TFRCD
|
traffic received
|
ATC
|
|
TFZ
|
traffic zone
|
GEN
|
|
TGL
|
touch and go landing
|
ICAO
|
|
TGS
|
taxiing guidance system
|
ICAO
|
|
THD
|
Thunderhead
|
NWS
|
|
THDR
|
Thunder
|
NWS
|
|
THK
|
Thick
|
NWS
|
|
THLD
|
Threshold
|
GEN
|
|
THN
|
Thin
|
NWS
|
|
THR
|
threshold
|
ICAO
|
|
THRFTR
|
Thereafter
|
GEN
|
|
THRU
|
Through
|
GEN
|
|
THRUT
|
Throughout
|
GEN
|
|
THSD
|
Thousand
|
GEN
|
|
THTN
|
threaten
|
GEN
|
|
THU
|
Thursday
|
ICAO
|
|
TIBA
|
Traffic information broadcast by
aircraft
|
ICAO
|
|
TIL
|
until
|
GEN
|
|
TINOP
|
transponder inoperative
|
ATC
|
|
TIP
|
until past
|
ATC
|
|
TIPS
|
terminal information processing
system
|
GEN
|
|
TKOF
|
takeoff
|
ICAO
|
|
TLM
|
Telemetry
|
ATC
|
|
TLRNC
|
tolerance
|
GEN
|
|
TLTP
|
too long to print
|
GEN
|
|
TLWD
|
tailwind
|
ATC
|
|
TM
|
time (PIREP only)
|
ATC
|
|
TM
|
traffic management
|
ATC
|
|
TMA
|
terminal control area
|
ICAO
|
|
TMPA
|
traffic management program alert
|
ATC
|
|
TMPRY
|
temporary
|
GEN
|
|
TMT
|
transmit
|
GEN
|
|
TMW
|
tomorrow
|
GEN
|
|
TNA
|
turn altitude
|
ICAO
|
|
TNDCY
|
tendency
|
GEN
|
|
TNGT
|
tonight
|
GEN
|
|
TNH
|
turn height
|
ICAO
|
|
TNTV
|
tentative
|
GEN
|
|
TO
|
travel order
|
GEN
|
|
TOC
|
to be continued
|
GEN
|
|
TOC
|
top of climb
|
ICAO
|
|
TOD
|
time of delivery
|
GEN
|
|
TODA
|
takeoff distance available
|
ICAO
|
|
TOG
|
takeoff gross weight
|
GEN
|
|
TOP
|
cloud top
|
NWS
|
|
TOR
|
time of receipt
|
GEN
|
|
TOR
|
traffic on request
|
ATC
|
|
TORA
|
takeoff run available
|
ICAO
|
|
TOT
|
time of transmission
|
GEN
|
|
TOVC
|
top of overcast
|
NWS
|
|
TP
|
turning point
|
ICAO
|
|
TP
|
type aircraft (PIREP only)
|
ATC
|
|
TPA
|
traffic pattern altitude
|
ATC
|
|
TPG
|
topping
|
NWS
|
|
TR
|
track
|
ICAO
|
|
TR
|
VFR low altitude training routes
|
GEN
|
|
TRA
|
temporary reserved airspace
|
ICAO
|
|
TRACAB
|
terminal radar approach control in
tower cab
|
GEN
|
|
TRACON
|
terminal radar approach control
facility
|
GEN
|
|
TRAD
|
terminal radar
|
GEN
|
|
TRAN
|
transient
|
ATC
|
|
TRANS
|
transmit or transmitter
|
ICAO
|
|
TRBL
|
trouble
|
GEN
|
|
TRCV
|
tricolor visual approach slope
indicator
|
GEN
|
|
TRIB
|
tributary
|
NWS
|
|
TRLVL
|
transition level
|
ICAO
|
|
TRML
|
terminal
|
GEN
|
|
TRMT
|
terminate
|
GEN
|
|
TRNG
|
Training
|
GEN
|
|
TRNSP
|
Transport
|
GEN
|
|
TROF
|
Trough
|
NWS
|
|
TROP
|
Tropopause
|
NWS
|
|
TRPCD
|
tropical continental (air mass)
|
NWS
|
|
TRPCL
|
Tropical
|
NWS
|
|
TRPLYR
|
trapping layer
|
NWS
|
|
TRRN
|
Terrain
|
GEN
|
|
TRSA
|
terminal radar service area
|
GEN
|
|
TRSN
|
Transition
|
GEN
|
|
TRTD
|
Treated
|
GEN
|
|
TS
|
team supervisor
|
GEN
|
|
TS
|
Thunderstorm
|
METAR
|
|
TS
|
transmitter station
|
GEN
|
|
TSA
|
Transportation Security
Administration
|
GEN
|
|
TSATLC
|
TransAtlantic
|
GEN
|
|
TSEC
|
terminal secondary radar beacon
|
GEN
|
|
TSFR
|
Transfer
|
GEN
|
|
TSGR
|
thunderstorm with hail
|
METAR
|
|
TSGS
|
thunderstorm with small hail
|
METAR
|
|
TSMNO
|
transmitting capability out of
service
|
GEN
|
|
TSMOK
|
transmitting capability returned to
service
|
GEN
|
|
TSNO
|
thunderstorm information not
available
|
METAR
|
|
TSNT
|
Transient
|
GEN
|
|
TSO
|
technical standard order
|
GEN
|
|
TSPAC
|
TransPacific
|
GEN
|
|
TSPL
|
thunderstorm with ice pellets
|
METAR
|
|
TSRA
|
thunderstorm with rain
|
METAR
|
|
TSSA
|
thunderstorm with duststorm
or sandstorm
|
METAR
|
|
TSSN
|
thunderstorm with snow
|
METAR
|
|
TSTM
|
thunderstorm
|
NWS
|
|
TT
|
teletypewriter
|
GEN
|
|
TTS
|
teletype switching facilities
|
GEN
|
|
TTY
|
teletypewriter station
|
GEN
|
|
TUE
|
Tuesday
|
ICAO
|
|
TURB
|
turbulence
|
ICAO
|
|
TURBC
|
turbulence
|
NWS
|
|
TURBT
|
turbulent
|
NWS
|
|
TVASIS
|
T visual approach slope indicator
system
|
ICAO
|
|
TVL
|
travel
|
GEN
|
|
TVOR
|
terminal VOR
|
GEN
|
|
TWD
|
toward
|
GEN
|
|
TWEB
|
transcribed weather broadcast
|
GEN
|
|
TWI
|
twilight
|
GEN
|
|
TWR
|
aerodrome control tower
|
ICAO
|
|
TWR
|
tower
|
GEN
|
|
TWRG
|
towering
|
NWS
|
|
TWS
|
radar track while scan
|
ATC
|
|
TWX
|
teletypewriter exchange service
|
GEN
|
|
TWY
|
taxiway
|
ICAO
|
|
TWYL
|
taxiway link
|
ICAO
|
|
TXG
|
taxiing
|
ATC
|
|
TXT
|
Text
|
ICAO
|
|
TYP
|
type aircraft
|
ICAO
|
|
TYPH
|
typhoon
|
ICAO
|
|
TYPNO
|
teletypewriter communications out of
service
|
GEN
|
|
TYPOK
|
teletypewriter communications
returned to service
|
GEN
|