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Paul Terwilliger wrote:

> Isn't it the case that VHF frequencies would be greatly attenuated by
> snow, say perhaps a snow cave?  Isn't this at least partly why avy
> beacons use 457 kHz?

I believe it's actually the opposite.  The higher the frequency, the more 
the energy gets absorbed wiggling water molecules.  Submarines use 
very low frequencies... sub-30 kHz... that can make it through 60 feet 
of water.  

Geoff

 

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