Direction Finding, or triangulation of a radio signal.
danke
Radio signals can be triangulated indeed.
The problem with CB, walkie talkies and ham radio is that they are all radio signals that can be df’ed.
Cb’ers operating out-of-band have been busted, and so have hams that have done the same.
Also the AM radio bootleggers; some of them were only using very low power transmitters covering only a few miles radius....
They weren’t the big guys offshore (boat/island/etc) using high-power rigs either.
Btw the high power guys got busted too.
Just a heads-up from a long-time techies.