Marker Beacon System * Function The marker beacon system is a radio navigation aid which determines the distance between the aircraft and the runway threshold. The system provides visual and aural indications
Marker Beacon Antenna – Lone Mountain Aircraft
feature identification - Can you identify this antenna on a Cessna 172N? - Aviation Stack Exchange
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Ultra‐small Marker Beacon Antenna with a Wide Frequency Tuneable Capacitive Plate - Park - 2016 - ETRI Journal - Wiley Online Library