of course,shen, *your* grandfather was an idiot. Mine was not.

shen, the radio treaty of 1919 or 1920 specifically included the requirement
that all commercial radio stations broadcast their call letters, their
frequency and city every ten minutes they were on the air. This was done
specifically as an aid to navigation for ships at sea and aircraft in the
air
(when it would come about that aircraft would be making long distance
flights).

specifically for navigation, shen, specifically.


Jax, specifically, that's terryific. Problem is that all those inland radio
stations have a problem with "coastal refraction" which makes their use
doubtful as regards accuracy.
Course, there were a number of other possible errors also, which, once again,
removed RDF from the cure-all category, especially for a Novice, such as
yourself.

Shen