题目内容

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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A glideslope or glidepath (GP) antenna array is sited to one side of the runway ____ zone.

A. threshold
B. touchdown
C. stopway
D. stopend

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

Localizer and glideslope carrier frequencies are ____ so that only one selection is required to tune both receivers.

A. separated
B. matched
C. paired
D. mated

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