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instructions, for pilot compliance, based on aircraft
Pilot/Controller Glossary 2/14/08
PCG S-8
position in relation to the final approach course
(azimuth), and the distance (range) from the end of
the runway as displayed on the controller's radar
scope. The controller will provide recommended
altitudes on final approach if requested by the pilot.
(Refer to AIM.)
SWAP-
(See SEVERE WEATHER AVOIDANCE PLAN.)
SWSL-
(See SUPPLEMENTAL WEATHER SERVICE
LOCATION.)
SYSTEM STRATEGIC NAVIGATION- Military
activity accomplished by navigating along a
preplanned route using internal aircraft systems to
maintain a desired track. This activity normally
requires a lateral route width of 10 NM and altitude
range of 1,000 feet to 6,000 feet AGL with some route
segments that permit terrain following.
2/14/08 Pilot/Controller Glossary
PCG T-1
T
TACAN-
(See TACTICAL AIR NAVIGATION.)
TACAN‐ONLY AIRCRAFT- An aircraft, normally
military, possessing TACAN with DME but no VOR
navigational system capability. Clearances must
specify TACAN or VORTAC fixes and approaches.
TACTICAL AIR NAVIGATION- An ultra‐high
frequency electronic rho‐theta air navigation aid
which provides suitably equipped aircraft a
continuous indication of bearing and distance to the
TACAN station.
(See VORTAC.)
(Refer to AIM.)
TAILWIND- Any wind more than 90 degrees to the
longitudinal axis of the runway. The magnetic
direction of the runway shall be used as the basis for
determining the longitudinal axis.
TAKEOFF AREA-
(See LANDING AREA.)
TAKE‐OFF DISTANCE AVAILABLE [ICAO]- The
length of the take‐off run available plus the length of
the clearway, if provided.
TAKE‐OFF RUN AVAILABLE [ICAO]- The length
of runway declared available and suitable for the
ground run of an aeroplane take‐off.
TARGET- The indication shown on an analog
display resulting from a primary radar return or a
radar beacon reply.
(See ASSOCIATED.)
(See DIGITAL TARGET.)
(See DIGITIZED RADAR TARGET.)
(See PRIMARY RADAR TARGET.)
(See RADAR.)
(See SECONDARY RADAR TARGET.)
(See TARGET SYMBOL.)
(See ICAO term TARGET.)
(See UNASSOCIATED.)
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.
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.
TCAS-
(See TRAFFIC ALERT AND COLLISION
AVOIDANCE SYSTEM.)
TCH-
(See THRESHOLD CROSSING HEIGHT.)
TCLT-
(See TENTATIVE CALCULATED LANDING
TIME.)
TDLS-
(See TERMINAL DATA LINK SYSTEM.)
Pilot/Controller Glossary 2/14/08
PCG T-2
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.
This time will be updated in response to an aircraft's
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