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(reported in miles or fractions of miles) for the runway.
RVV is used in lieu of prevailing visibility in determining minimums for a particular runway.
Significant Point – [ICAO Annex 11] A specified geographical location used in defining an ATS route or the
flight path of an aircraft and for other navigation and
ATS purposes.
Special Instrument Approach Procedure – A procedure approved by the FAA for individual operators, but
not published in FAR 97 for public use.
Special Use Airspace Management System (SAMS)
– A joint FAA and military program designed to
improve civilian access to special use airspace by providing information on whether the airspace is active or
scheduled to be active. The information is available to
authorized users via an Internet website.
Standard Instrument Departure (SID) – An ATC
requested and developed departure route designed to
increase capacity of terminal airspace, effectively control the flow of traffic with minimal communication,
and reduce environmental impact through noise abatement procedures.
C-13
Takeoff Distance Available (TODA) – ICAO defines
TODA as the length of the takeoff runway available
plus the length of the clearway, if provided.
Takeoff Runway Available (TORA) – ICAO defines
TORA as the length of runway declared available and
suitable for the ground run of an aeroplane takeoff.
Tangent Point (TP) –The point on the VOR/DME
RNAV route centerline from which a line perpendicular
to the route centerline would pass through the reference
facility.
Terminal Arrival Area (TAA) – TAAs are the method
by which aircraft are transitioned from the RNAV en
route structure to the terminal area with minimal ATC
interaction. The TAA consists of a designated volume
of airspace designed to allow aircraft to enter a protected area, offering guaranteed obstacle clearance
where the initial approach course is intercepted based
on the location of the aircraft relative to the airport.
Threshold – The beginning of the part of the runway
usable for landing.
Top of Climb (TOC) – An identifiable waypoint representing the point at which cruise altitude is first
reached. TOC is calculated based on your current aircraft altitude, climb speed, and cruise altitude. There
can only be one TOC waypoint at a time.
Top of Descent (TOD) – Generally utilized in flight
management systems, top of descent is an identifiable
waypoint representing the point at which descent is first
initiated from cruise altitude. TOD is generally calculated using the destination elevation (if available) and
the descent speed schedule.
Touchdown and Lift-Off Area (TLOF) – The TLOF
is a load bearing, usually paved area at a heliport where
the helicopter is permitted to land. The TLOF can be
located at ground or rooftop level, or on an elevated
structure. The TLOF is normally centered in the FATO.
Touchdown RVR – The RVR visibility readout values
obtained from sensors serving the runway touchdown
zone.
Touchdown Zone Elevation (TDZE) – The highest
elevation in the first 3,000 feet of the landing surface.
Tower En Route Control (TEC) – The control of IFR
en route traffic within delegated airspace between two
or more adjacent approach control facilities. This service is designed to expedite air traffic and reduces air
traffic control and pilot communication requirements.
TRACAB – A new type of air traffic facility that consists of a radar approach control facility located in the
tower cab of the primary airport, as opposed to a separate room.
Standard Service Volume – Most air navigation radio
aids which provide positive course guidance have a
designated standard service volume (SSV). The SSV
defines the reception limits of unrestricted NAVAIDS
which are usable for random/unpublished route navigation. Standard service volume limitations do not apply
to published IFR routes or procedures. See the AIM for
the SSV for specific NAVAID types.
Standard Terminal Arrival (STAR) – Provides a
common method for departing the en route structure
and navigating to your destination. A STAR is a preplanned instrument flight rule ATC arrival procedure
published for pilot use in graphic and textual form to
simplify clearance delivery procedures. STARs provide
you with a transition from the en route structure to an
outer fix or an instrument approach fix or arrival waypoint in the terminal area, and they usually terminate
with an instrument or visual approach procedure.
Standardized Taxi Routes – Coded taxi routes that
follow typical taxiway traffic patterns to move aircraft
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Instrument Procedures Handbook (IPH)仪表程序手册上(192)
