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
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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
词汇与结构The ____ of the glideslope signal is arranged to define a glideslope of approximately 3° above ground level.
A. centerline
B. front
C. back
D. sideline
词汇与结构Localizer and glideslope carrier frequencies are ____ so that only one selection is required to tune both receivers.
A. seperated
B. matched
C. paired
D. mated
词汇与结构Localizer and glideslope signals are displayed on an indicator in the instrument ____. This instrument is generally called the omni-bearing indicator or nav indicator.
A. board
B. panel
C. table
D. stand