Pilot/Controller Glossary

TARGET [ICAO]- In radar:
a. Generally, any discrete object which reflects or retransmits energy back to the radar equipment.
b. Specifically, an object of radar search or surveillance.
TARGET RESOLUTION- A process to ensure that correlated radar targets do not touch. Target resolution must
be applied as follows:
a. Between the edges of two primary targets or the edges of the ASR-9/11 primary target symbol.
b. Between the end of the beacon control slash and the edge of a primary target.
c. Between the ends of two beacon control slashes.
Note 1: Mandatory traffic advisories and safety alerts must be issued when this procedure is used.
Note 2: This procedure must not be used when utilizing mosaic radar systems or multi-sensor mode.

TARGET SYMBOL-
(See TARGET.)
(See ICAO term TARGET.)

TARMAC DELAY- The holding of an aircraft on the ground either before departure or after landing with no
opportunity for its passengers to deplane.
TARMAC DELAY AIRCRAFT- An aircraft whose pilot-in-command has requested to taxi to the ramp, gate,
or alternate deplaning area to comply with the Three-hour Tarmac Rule.
TARMAC DELAY REQUEST- A request by the pilot-in-command to taxi to the ramp, gate, or alternate
deplaning location to comply with the Three-hour Tarmac Rule.
TAS-
(See TERMINAL AUTOMATION SYSTEMS.)

TAWS-
(See TERRAIN AWARENESS WARNING SYSTEM.)

TAXI- The movement of an airplane under its own power on the surface of an airport (14 CFR
Section 135.100 [Note]). Also, it describes the surface movement of helicopters equipped with wheels.
(See AIR TAXI.)
(See HOVER TAXI.)
(Refer to 14 CFR Section 135.100.)
(Refer to AIM.)

TAXI PATTERNS- Patterns established to illustrate the desired flow of ground traffic for the different runways
or airport areas available for use.
TBM-
(See TIME-BASED MANAGEMENT.)

TBO-
(See TRAJECTORY-BASED OPERATIONS.)

TCAS-
(See TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM.)

TCH-
(See THRESHOLD CROSSING HEIGHT.)

TDLS-
(See TERMINAL DATA LINK SYSTEM.)
TDZE-
(See TOUCHDOWN ZONE ELEVATION.)