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A comment on The cave divers who went back for their friends. Parent comment

Re:The cave divers who went back for their friends by simonh on Monday May 09, 2016 @06:25AM (#11658702)
The a highly restricted, complex cave environment with echoes all over the place? Probably not much.
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Re:The cave divers who went back for their friends by caf on Monday May 09, 2016 @08:35AM (#11659276)
I suspect you could use the echoic environment to your advantage with a MIMO type system.
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