So basically the journalist is amazed by the &quot;weakness&quot; of radio signal... which is it can be (either in reception or in emission) localized by triangulation ...<p>Wahou! A great re-discovery of how our two ears can localize the sound of anything.<p>(I will let people search by themselves a little bit on how a RADIO receptor can also be tracked with radio triangulation, emission is trivial. It implies you can create stingray detectors with a big enough budget... ouch)