That brings back memories of the mid 1970's in S.A. when a (then) modern sailplane may have had an 'Alpha Genave' two channel radio with only 122.7 and 122.9 MHz available.
Gerry111; Or as you would remember, in the case of old 'Uniform Lima', a dodgy Pye Bantam with only the two abovementioned frequencies. And we managed ok, did we not?
And UL was the only BVGC Glider to have a radio IIRC.
I was flying gliders in the mid 70s and they had no radio at all...but neither did many powered aircraft. We just had to look harder then!
True.