Quote:
Originally Posted by Wim Libaers
Another technique that can be used is detonating an explosive charge, and checking for anything that reflects the resulting pulse. The idea is similar to the detection of secondary reflections of someone else's active pings, except in this case you usually know exactly where and when the charge will be detonated.
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Yes, that's how EER sonobuoys work. It's called multistatic acoustics.