Legend 1F: Abbreviations

10 GENERAL INFORMATION Abbreviation ..............Description tfc............................. traffic thld........................... threshold thou.......................... thousand thru........................... through Thu........................... Thursday til.............................. until tkf, tkof......................take–off TLv ........................... Transition Level tmpry........................temporary TODA........................Take–Off Distance Available TORA ........................Take–Off Run Available TP ............................ Tire Pressure TPA........................... Traffic Pattern Altitude TRACON....................Terminal Radar Approach Control (FAA) tran........................... transient trans .........................transmit trml........................... terminal trng........................... training trns........................... transition TRSA ........................Terminal Radar Service Area Tue ........................... Tuesday TV ............................ Television TWEB .......................Transcribed Weather Broadcast twr............................ tower twy ........................... taxiway UACC........................Upper Area Control Center (used outside US) UAS .......................... Unmanned Aerial Systems UC............................ Under Construction UCN .........................Urgent Change Notice UDA.......................... Upper Advisory Area UDF..........................…