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- General Radiotelephone Operator (Element 3 (GROL)) »
- FCC Element 3 - General Radiotelephone
419. Choose the only correct statement about the localizer beam system used by aircraft to find the centerline of a runway during an Instrument Landing System (ILS) approach to an airport. The localizer beam system:
The localizer uses two amplitude-modulated beams, 90 Hz and 150 Hz, to provide lateral guidance to the runway centerline; one beam is stronger left of the centerline, and the other is stronger right of the centerline.
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