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J. Scott Landon <landonjs@a1*.sw*.um*.du*.co*> wrote:
>...  the extra vacuums with low moisture oxygen is 
>how they get the aviators.  its dew point must be lower to offset 
>the extreme cold at altitude and the possibility of freezing.  in 
>any state where you must have a prescription to get USP (medical) 
>oxygen (and can't get one easily), just buy the aviators.  ...

This far north (Canada), there is the possibility of a regulator
freezing underwater, and extremely dry gasses are a very good idea.  I
like the idea of using aviator's O2 for that reason, in addition to the
warm fuzzy feeling from using something sold as fit for human consumption
as opposed to industrial grade.

(Trespassing over into another thread for a moment, I understand that the
dew point standard for SCUBA air pumped in Canada is much stricter than
in more southerly latitudes, and this could be a factor in Genesis tanks
lasting longer here than down there.)

-- 
Anthony DeBoer                                  http://www.onramp.ca/~adb/
adb@he*.re*.or* (here)
adb@ge*.co* (work)                             #include "std.disclaimer"

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