Once again, in war the real winners are arms developers.
It's even that way fishing for tuna. I had to install voice scramblers to cover conversations between boat, base station and other boats. The conversation was obscured, so the next step was homing in on the RF. Many boats had radio direction finders. Many had scanners. The problem was identifying what frequency to set the RDF to point at the origin of the VHF transmission. I resolved that by integrating a Taiyo RDF with a Regency scanner. I tapped the goniometer output and routed into the Regency scanner front end. I tapped the 10.7 MHz IF of the scanner and routed it back inside of the RDF ahead of the detector circuits. Voila! The scanner stopped on an active frequency and the RDF pointed at the origin. My employer sold the conversion to every boat in the harbor. $10 in parts and 30 minutes of labor.
It was a perpetual technical counter measure effort even when just fishing for tuna. The stakes are much higher on the battlefield and it pays better.