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resulting from a primary radar return or a radar
beacon reply.
(See RADAR.)
(See TARGET SYMBOL.)
(See ICAO term TARGET.)
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
shall be applied as follows:
a. Between the edges of two primary targets or the
edges of the ASR-9 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 SHALL BE ISSUED
WHEN THIS PROCEDURE IS USED.
Note 2: This procedure shall not be provided
utilizing mosaic radar systems.
TARGET SYMBOL− A computer-generated indication
shown on a radar display resulting from a
primary radar return or a radar beacon reply.
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.
TCAS−
(See TRAFFIC ALERT AND COLLISION
AVOIDANCE SYSTEM.)
TCH−
(See THRESHOLD CROSSING HEIGHT.)
TCLT−
(See TENTATIVE CALCULATED LANDING
TIME.)
TDZE−
(See TOUCHDOWN ZONE ELEVATION.)
TELEPHONE INFORMATION BRIEFING SERVICE−
A continuous telephone recording of meteorological
and/or aeronautical information.
(Refer to AIM.)
TENTATIVE CALCULATED LANDING TIME− A
projected time calculated for adapted vertex for each
arrival aircraft based upon runway configuration,
airport acceptance rate, airport arrival delay period,
and other metered arrival aircraft. This time is either
the VTA of the aircraft or the TCLT/ACLT of the
previous aircraft plus the AAI, whichever is later.
Pilot/Controller Glossary 2/19/04
PCG T−2
This time will be updated in response to an aircraft’s
progress and its current relationship to other arrivals.
TERMINAL AREA− A general term used to describe
airspace in which approach control service or airport
traffic control service is provided.
TERMINAL AREA FACILITY− A facility providing
air traffic control service for arriving and
departing IFR, VFR, Special VFR, and on occasion
en route aircraft.
(See APPROACH CONTROL FACILITY.)
(See TOWER.)
TERMINAL RADAR SERVICE AREA− Airspace
surrounding designated airports wherein ATC provides
radar vectoring, sequencing, and separation on
a full-time basis for all IFR and participating VFR
aircraft. The AIM contains an explanation of TRSA.
TRSAs are depicted on VFR aeronautical charts.
Pilot participation is urged but is not mandatory.
TERMINAL VFR RADAR SERVICE− A national
program instituted to extend the terminal radar
services provided instrument flight rules (IFR)
aircraft to visual flight rules (VFR) aircraft. The
program is divided into four types service referred to
as basic radar service, terminal radar service area
(TRSA) service, Class B service and Class C service.
The type of service provided at a particular location
is contained in the Airport/Facility Directory.
a. Basic Radar Service− These services are provided
for VFR aircraft by all commissioned terminal
radar facilities. Basic radar service includes safety
alerts, traffic advisories, limited radar vectoring
when requested by the pilot, and sequencing at
locations where procedures have been established for
this purpose and/or when covered by a letter of
agreement. The purpose of this service is to adjust the
flow of arriving IFR and VFR aircraft into the traffic
pattern in a safe and orderly manner and to provide
traffic advisories to departing VFR aircraft.
b. TRSA Service− This service provides, in
addition to basic radar service, sequencing of all IFR
and participating VFR aircraft to the primary airport
and separation between all participating VFR aircraft.
The purpose of this service is to provide
separation between all participating VFR aircraft and
all IFR aircraft operating within the area defined as a
　
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