Mortimer Schnerd, RN wrote:
Radio ranges. Pilots flew along a beam listening to dots and dashes.
The tone changed if you drifted off the beam. Some of the old timers
here can explain this a lot better than me since I didn't start
flying until the late 1970's.
As I think about it, the Morse that was transmitted was a series of A's and N's.
I can't remember any more than that about it.
--
Mortimer Schnerd, RN
http://www.mortimerschnerd.com