On 24 May 2010 at 13:34, Lenox Carruth wrote: > The original photon navigation system. I used photon navigation for > many years when I was still flying. According to my "Elmer" Woody Davey, W7CJB, Montana had the best system of airways beacons in the entire world for a while. He was in charge of those, among other things. Ken W7EKB