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Anthony DeBoer     wrote
> Personally, I think there's a
>transitional zone between 130 and maybe 180 or 200; shallower and you'd
>be wasting perfectly good helium, deeper and you're too far out on the
>ragged edge, but within that transitional range it's a question of
>complexity of dive and suchforth. 
etc.
>Maybe we should have an Official Terminology Change; "Deep Air" should
>mean "diving on air to a generally-accepted reasonable limit" and
>"Extreme Air" should mean "diving on air beyond such a limit".  I hereby
>nominate 180 feet for that figure.
>
>There.  If that's not discussion starter, I don't know what is.
>

I'll bite this hook.  Personally I draw the line at 180. I won't go deeper
on air. That is partially my own narcosis tolerance, partially due to PO2. 

Have used gas shallower though if that was what I had in my tanks and on
working dives.  

Tim Taylor

taylor@ru*.ne*

1997 FSUPC Photo Contest Rules, entry form, previous winners
1997 Great Lakes Shipwreck Festival information
http://www.rust.net/~taylor

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