Marker beacons on the ILS use which frequency?

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Prepare for the United Airlines Flight Simulator Technician Test with this comprehensive guide. Study with multiple-choice questions and detailed explanations to ace your exam and secure your dream career as a flight simulator technician with United Airlines!

Multiple Choice

Marker beacons on the ILS use which frequency?

Explanation:
Marker beacons along an ILS operate on a fixed 75 MHz carrier. This dedicated frequency is separate from the ILS localizer band around 110 MHz and other aviation bands, and it’s what your cockpit marker detector tunes to in order to identify when you’re at the outer, middle, or inner marker. Each marker also uses distinct audio tones to further distinguish which marker you’ve reached (outer with one tone, middle with another, inner with another). So the frequency used by the marker beacons is 75 MHz.

Marker beacons along an ILS operate on a fixed 75 MHz carrier. This dedicated frequency is separate from the ILS localizer band around 110 MHz and other aviation bands, and it’s what your cockpit marker detector tunes to in order to identify when you’re at the outer, middle, or inner marker. Each marker also uses distinct audio tones to further distinguish which marker you’ve reached (outer with one tone, middle with another, inner with another). So the frequency used by the marker beacons is 75 MHz.

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