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6 – i ndex
Stopway:
Adefined rectangular areaon theground at the endof the
take-off run availableprepared as a suitablearea inwhich anaircraft
canbe stopped in the caseof an abandoned take-off.
SupplementalMeansNavigationSystem:
Anavigation system
thatmust beused in conjunctionwitha solemeans navigation
system.
TacticalAirNavigation (TACAN):
Anultra-high frequency
navigation aidwhichprovides a continuous indicationof bearingand
slant range, innauticalmiles, to the selectedground station.
Taxiway (TWY):
Adefinedpathon a land aerodrome established for the
taxiingof aircraft and intended toprovidea link betweenonepart of
the aerodrome and another.
TerrainClearance:
The vertical displacement of anaircraft’s flight
path from the terrain.
Threshold:
Thebeginningof that portionof the runwayusable for
landing.
ThresholdCrossingHeight:
Theheight of the ILSglidepath at the
threshold.
TotalEstimatedElapsedTime:
For lFRflights, theestimated
time required from take-off to arriveover that designatedpoint,
definedby reference tonavigation aids, fromwhich it is intended
that an instrument approachprocedurewill be commenced, or if no
navigationaid is associatedwith thedestinationaerodrome, toarrive
over thedestination aerodrome. For VFRflights theestimated time
required from take-off to arriveover thedestination aerodrome.
Touch-and-Go Landing:
Aprocedurewhereby an aircraft lands and
takes offwithout coming to a stop.
Track:
Theprojectionon the earth’s surfaceof thepathof an aircraft,
thedirectionofwhichpathat anypoint is usually expressed in
degrees fromNorth (true,magnetic or grid).
TransitionAltitude:
The altitudeat or belowwhich the vertical
positionof an aircraft is controlledby reference toaltitudes.
Transition Layer:
The airspacebetween the transitionaltitude and
the transition level.
definitions