which was written by a bunch of Wehrmacht officers with radio intel experience in both WW-1 and WW-2. One thing I thought was interesting was their mention of the Polish and Czechs pre-war exercises and when the Nazi's were actually on the move, the Poles and Czech's followed the same plans, complete with call signs and marshalling locations, which the Nazi's had already DF'd! It's a long read and a little dry at times, but definitely is written by people who know their business.
We were always told in the Army to use wirelines between units in cantonment areas (I've laid miles of WD1-TT). We were also told that about 11 seconds after pushing the mic button, the Russians could DF your position and have artillery on the way. When we were in Bavaria for REFORGER, as long as we used speech security devices, there was terrific radio jamming from Czechoslovakia. As soon as we went back to nonsecure and encryption pads, the jamming stopped. Nowadays, they have frequency hoppers and I'd love to see how those work!
PS: CW still does the job!