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Signal Triangulation
I was watching NG's Inside the Green Berets the other day, and was struck with the feeling of always having unfriendly eyes watching and reporting position and movement. Through my limited perspective of the documentary, it seemed as if this changed the initiative from the US forces to the Taliban. There was a sense of always looking over the shoulder because you could hear the spotters talking about SF's movements. My unexperienced opinion is that it should be the Taliban looking over their shoulders, not the other way around (and as the documentary was limited is scope, this may very well be the case).
As I was watching, I wondered if it wouldn't be possible to put up a couple radio antennas around the hills in the area with the ability to give signal direction, and link these to a station in the firebase. The radio operator, upon hearing a radio transmission, would tune the antennas to that frequency and get a triangulation on position. This would allow the guys in the field to at least put eyes on the sender, and as circumstances allow, drop a couple shells on their position. At the very least it might allow recognition of certain patterns of observation. If the bad guys are afraid to pick up their radios, it seems like a major step in making US movements more secure...
Apologies if something like this is common knowledge or in practice in the field or if the situational aspects make this an obvious impracticality.
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