(2)
FOR ROTARY WINGS AND VECTORED THRUST AIRCRAFT - That portion of the helicopter landing area or runway used for landing.

TOUCHDOWN ZONE (ICAO) - The portion of a runway, beyond the threshold, where it is intended landing aircraft first contact the runway.
TOUCHDOWN ZONE ELEVATION/TDZE -The highest elevation in the first 3,000 feet of the landing surface. TDZE is indicated on the instrument approach procedure chart when straight-in landing minimums are authorized. (See Touchdown Zone)
TOUCHDOWN ZONE LIGHTING - (See Airport Lighting)
TOWER/AIRPORT TRAFFIC CONTROL TOWER/ATCT - A terminal facility that uses air/ground radio communications, visual signaling, and other devices to provide Air Traffic Control services to aircraft operating in the vicinity of an airport or on the movement area. Authorizes aircraft to land or take-off at the airport controlled by the tower or to transit the airport traffic area regardless of flight plan or weather conditions (IFR or VFR). A tower may also provide approach control service (radar or nonradar). (See Airport Traffic Area, Airport Traffic Control Service, Approach Control/Approach Control Facility, Approach Control Service, Movement Area, Tower Enroute Control Service/Tower to Tower)
TOWER ENROUTE CONTROL SERVICE/TOWER TO TOWER -The control of IFR enroute traffic within delegated airspace between two or more adjacent approach control facilities. This service is designed to expedite traffic and reduce control and pilot communication requirements.
TPX 42 - A numeric beacon decoder equipment/system. It is designed to be added to terminal radar systems for beacon decoding. It provides rapid target identification, reinforcement of the primary radar target and altitude information from Mode C. (See Automatic Radar Terminal Systems, Transponder)
TRACK (P/CG) - The actual flight path of an aircraft over the surface of the earth. (See Course, Route, Flight Path) TRACK (JCS, NATO, ICAO) - The projection on the earth's surface of the path of an aircraft, the direction of which path at any point is usually expressed in degrees from North (true, magnetic or grid).

TRAFFIC -
(1)
A term used by a controller to transfer radar identification of an aircraft to another controller for the purpose of coordinating separation action. Traffic is normally issued (a) in response to a handoff or point out, (b) in anticipation of a handoff or point out, or (c) in conjunction with a request for control of an aircraft.

(2)
A term used by Air Traffic Control to refer to one or more aircraft.

TRAFFIC ALERT - (Identification), traffic alert, advise you turn left/right (specific heading if appropriate), and/or climb/descend (specific altitude if appropriate) immediately. (See Safety Alert)
TRAFFIC ADVISORIES - Advisories issued to alert pilots to other known or observed air traffic which may be in such proximity to the position or intended route of flight of their aircraft to warrant attention. Such advisories may be based on: