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Harold Gartner's posting about a fatality on a seamount brings up a related
topic - the victim was apparently diving air on his back and gas in a stage. 
I have heard of others doing this, like Sheck Exley on one of his Mante dives,
and Steve Berman on a recent Doria trip.

If there is anyone else who favors this approach and would care to explain the
benefits, I'd like to hear them.  I gather (2nd hand from Berman) that the big
advantage is that you can deco on the gas on your back.  Personally I see a
lot of drawbacks, like having to go back on air at the worst possible time if
you are deep, have a problem, start breathing fast, and run out of trimix.

John
Heimannj@ma*.nd*.gt*.co*

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