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A walkie-talkie receiving a message should be a passive device no? One can triangulate a radio broadcasting, I don't know how one would track receiving the bro
by bhelkey 2y ago
A walkie-talkie receiving a message should be a passive device no?
One can triangulate a radio broadcasting, I don't know how one would track receiving the broadcast.
- lukan 2y agoIf the walkie talkie remains a passiv listener, then no, but then it is also only half as useful. And a unmodified pager is a passive listener by default and cannot be tracked, which is why they were bought in the first place from Hezbollah.
- zeroCalories 2y agoTracking radios like that is very hard when the signal is far away and in urban environments.
- dexwiz 2y agoIts hard but its not impossible. Functionally you need some very accurate equipment and some knowledge of the receiver. This is one of those areas where the military and government likely have approaches that are secret. https://en.wikipedia.org/wiki/TV_detector_van https://en.wikipedia.org/wiki/TV_detector_van
- vueko 2y agoA traditional FM walkie-talkie, yes, passive, but a P25/DMR handheld radio, especially operating in trunked mode, not necessarily. One notorious example of this is P25's use of packet retransmission requests: https://www.mattblaze.org/papers/p25sec.pdf https://www.mattblaze.org/papers/p25sec.pdf A lot of worksite-oriented handheld radios these days are not just oldschool FM and use digital protocols to efficiently manage bandwidth, which can involve transmitting when not actually sending voice data. I haven't seen any confirmation of whether the affected devices were digital or not, but if they were buying COTS radio equipment there's a decent chance that they were.
- bigfatkitten 2y agoThey were Icom IC-V82s. A long discontinued VHF FM radio.
- vueko 2y agoInteresting, thanks!