词汇与结构Aircraft guidance is provided by the ILS receivers in the aircraft by performing a ____ depth comparison.
A. adjustment
B. modification
C. modulation
D. rectification
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词汇与结构A localizer (LOC) antenna array is normally ______ beyond the departure end of the runway and generally consists of several pairs of directional antennas.
A. adjusted
B. supported
C. located
D. equipped
词汇与结构A localizer (LOC) antenna array generally consists of several pairs of ____ antennas.
A. precision
B. directional
C. non-directional
D. non-precision
词汇与结构Each ILS antenna ____ a narrow beam, one slightly to the left of the runway centerline, the other to the right.
A. transmits
B. sends
C. transfers
D. delivers
词汇与结构A glideslope or glidepath (GP) antenna array is sited to one side of the runway ____ zone.
A. threshold
B. touchdown
C. stopway
D. stopend