As radio waves get attenuated as they travel through water and rock and this attenuation is reduced as the frequency is lowered, cavers tend to use interesting techniques to communicate (and survey) with cavers.
A very interesting book by Mike Bedford G4AEE goes through all the techniques used by cavers.
Even for somebody like me who (would be too scared!) it make good Christmas reading. The book "Cave Radio" is available from the RSGB bookshop.
1 comment:
I bought a copy shortly after it was advertised. One of the most interesting reads I’ve had in quite a while, combining radio with geology and other science.
By the way, you wouldn’t get me in one of those caves either!
Regards,
Keith
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