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STRAIGHT-IN APPROACH VFR− Entry into the
traffic pattern by interception of the extended runway
centerline (final approach course) without executing
any other portion of the traffic pattern.
(See TRAFFIC PATTERN.)
STRAIGHT-IN LANDING− A landing made on a
runway aligned within 30
of the final approach
course following completion of an instrument approach.
(See STRAIGHT-IN APPROACH IFR.)
STRAIGHT-IN LANDING MINIMUMS−
(See LANDING MINIMUMS.)
STRAIGHT-IN MINIMUMS−
(See STRAIGHT-IN LANDING MINIMUMS.)
STRATEGIC PLANNING− Planning whereby solutions
are sought to resolve potential conflicts.
SUBSTITUTE ROUTE− A route assigned to pilots
when any part of an airway or route is unusable
because of NAVAID status. These routes consist of:
a. Substitute routes which are shown on U.S.
Government charts.
8/5/04 Pilot/Controller Glossary
PCG S−7
b. Routes defined by ATC as specific NAVAID
radials or courses.
c. Routes defined by ATC as direct to or between
NAVAIDs.
SUNSET AND SUNRISE− The mean solar times of
sunset and sunrise as published in the Nautical
Almanac, converted to local standard time for the
locality concerned. Within Alaska, the end of evening
civil twilight and the beginning of morning civil
twilight, as defined for each locality.
SUPER HIGH FREQUENCY− The frequency band
between 3 and 30 gigahertz (GHz). The elevation and
azimuth stations of the microwave landing system
operate from 5031 MHz to 5091 MHz in this spectrum.
SUPPLEMENTAL WEATHER SERVICE LOCATION−
Airport facilities staffed with contract personnel
who take weather observations and provide
current local weather to pilots via telephone or radio.
(All other services are provided by the parent FSS.)
SUPPS− Refers to ICAO Document 7030 Regional
Supplementary Procedures. SUPPS contain procedures
for each ICAO Region which are unique to that
Region and are not covered in the worldwide
provisions identified in the ICAO Air Navigation
Plan. Procedures contained in Chapter 8 are based in
part on those published in SUPPS.
SURFACE AREA− The airspace contained by the
lateral boundary of the Class B, C, D, or E airspace
designated for an airport that begins at the surface and
extends upward.
SURPIC− A description of surface vessels in the area
of a Search and Rescue incident including their
predicted positions and their characteristics.
(Refer to FAAO 7110.65, Para 10−6−4,
INFLIGHT CONTINGENCIES.)
SURVEILLANCE APPROACH− An instrument
approach wherein the air traffic controller issues
instructions, for pilot compliance, based on aircraft
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.

2/19/04 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 a radar display
　
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