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.

shen is meandering more than a bit, but if you read and reread and read
again
to see what he is saying you will find he is troubled to agreed with me, but
he
finds he has to.


G Actually, I'm pointing out the errors in your "general" statement
regarding
RDF and the overall usage of it by those in the marine environment.
For the most part, most ships only used signals from RDF stations on the
coast
that were designed for marine use, as the others required too much in the way
of corrections to be reliable other than as a possible indication to help
correct their DR.
I'd like to hear your explaination of fixes using sounds/smells from shore
and
fathom curves.... the above stuff, anyone can get from some light reading.

Shen