Courtesy of


May 1944 Sectional Chart.
This map shows the beacon light that was on an early US mail air route, which followed a straight line between Louisville and Lunken Airport.  The stars denote landing sites - note, one at Warsaw, Beaverlick, Springlake, and Lunken Field.  The purple highlighting shows the flight path, and the purple elliptical shape denotes a "Fan Marker Beacon" which existed at the place we know as Beacon Light. Fan Markers (fans) were put at airway intersections to alert the pilot to his position along the airway, otherwise he wouldn't know exactly where he was until he passed over a low frequency station which could be up to 100 miles.
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