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

GEN

TACLO

tactical air command liaison officer

GEN

TACR

tactical air navigation

GEN

TAD

ATC tower, approach and departure control facility

ATC

TAF

aerodrome forcast

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

trans-continental

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

TDO

tornado

ICAO

TDOP

Time Dilution of Precision

ATC

TDWR

Terminal Doppler Weather Radar

ATC

TDY

temporary duty

GEN

TDZ

touchdown zone

GEN

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

METAR

TEND

trend

ICAO

TERPS

terminal instrument procedures

GEN

TET

tetrahedron

GEN

TF

terrain following

GEN

TFC

traffic

GEN

TFRCD

traffic received

ATC

TFZ

traffic zone

GEN

TGL

touch and go landing

GEN

TGS

taxiing guidance system

ICAO

THD

thunderhead

NWS

THDR

thunder

NWS

THK

thick

NWS

THLD

threshold

GEN

THN

thin

NWS

THR

threshold

ATC

THRFTR

thereafter

GEN

THRU

through

GEN

THRUT

throughout

GEN

THSD

thousand

GEN

THTN

threaten

GEN

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

take-off

GEN

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

take-off distance available

ICAO

TOG

take-off gross weight

GEN

TOP

cloud top

NWS

TOR

time of receipt

GEN

TOR

traffic on request

ATC

TORA

take-off 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

tri-color 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

TSATLC

Trans-Atlantic

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

TSNT

transient

GEN

TSO

technical standard order

GEN

TSNO

thunderstorm information not available

METAR

TSPAC

Trans-Pacific

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

TURB

turbulence

ICAO

TURBC

turbulence

NWS

TURBT

turbulent

NWS

T-VASIS

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

GEN

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