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Old 26 January 2008, 06:51 PM   #22
ErikAalto
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Join Date: Oct 2007
Real Name: Erik
Location: Clayton, NC
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From what I understand, it is only of use if you are in an environment (e.g.; diving bell) where you would be breathing a mixture of air with helium. There is no need for it if you are simply going on a dive from the surface.
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