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control area established at the meeting
place of a number of routes near one or
more major airports In some areas
where there is a local concentration of
traffic, terminal control areas are set
up. Abbreviation TCA, TMA
terminate terminate /t%mnet/ verb to end, or
to bring to a close The flight terminates
in New York. the transmission
terminated abruptly the transmission
stopped suddenly and unexpectedly
terminology terminology / t%m|nɒləd"i/ noun a
set of words or expressions used for a
particular subject It is necessary to
learn some of the terminology associated
with aircraft navigation.
terrain terrain /tə|ren/ noun land, especially
in relation to its physical geography
Special attention should be paid to wind
flow when flights are made over hills or
mountainous terrain.
terrestrial terrestrial /tə|restriəl/ adjective
referring to the earth Clear skies allow
terrestrial radiation to escape.
territory territory /tert(ə)ri/ noun the extent
of the surface of the Earth governed by
a particular country, ruler, state, etc.
All places in the same territory, or part
of the same territory, maintain a standard
of time as laid down by the government
responsible for that territory.
tertiary tertiary /t%ʃəri/ adjective referring
to something which is third in order of
rank, behind primary and secondary
Tertiary radar systems are synonymous
with long-range navigation aids. Tertiary
structures, for example fairings,
wheel doors and minor component
brackets, are essential parts of the airframe.
tertiary radar tertiary radar / t%ʃəri redɑ/ noun
long-range navigation aids
test test /test/ noun 1. a series of operations
to find out if something is working
well The manual test for the engine
fire warning system will give a steady
red light on all the fire control handles.
2. an examination to assess the knowledge
of a person There is a navigation
test for students at 0800 hours. verb 1.
to operate something in order to find out
whether it functions correctly Oxygen
under pressure is used to test the oxygen
masks and equipment for fit and leakage.
2. to examine somebody in order to
assess his or her knowledge The students
are tested in five subjects.
test pilot test pilot /test palət/ noun a pilot
who flies new aircraft in order to check
their performance
TGT TGT abbreviation turbine gas temperature
theory theory /θəri/ noun a system of ideas
or principles explaining something
The theory of navigation must be studied
before any practical plotting exercises
are done.
theory of flight theory of flight / θəri əv flat/
noun the ideas and principles which
contribute to our understanding of how
things fly
thereafter thereafter /ðeər|ɑftə/ adverb after
that, beyond that Meteorological visibility
is given in metres up to 5,000
metres and thereafter in km (kilometres).
thereby thereby /ðeə|ba/ adverb by that
means or in that way The evacuation
was carried out at a slower rate,
thereby minimising the risk of injury to
passengers.
therefore therefore /ðeəfɔ/ adverb as a result,
consequently At small throttle openings,
the depression at the choke is very
small and therefore no fuel flows from
the main jet.
thermal thermal /θ%m(ə)l/ adjective referring
to heat Intense surface heating
causes thermal currents to develop and
create convection. noun a rising current
of relatively warm air in the lower
atmosphere Glider pilots circle in
thermals in order to gain height.
thermal activity thermal activity / θ%m(ə)l k|
tvti/ noun a period of time when
there is a lot of vertical movement of air
caused by heating Cumulus clouds
thermal barrier 232
may develop because of thermal activity
resulting from the warming of the surface.
thermal barrier thermal barrier / θ%m(ə)l briə/
noun the heat caused by air friction on
an aircraft flying at high speed
thermo- thermo- /θ%məυ/ prefix heat
thermocouple thermocouple /θ%məυk p(ə)l/
noun a device for measuring temperature
Variation in temperature of the
cooling air will give some indication of
engine trouble through a thermocouple
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Dictionary of Aviation下(90)
