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On Mon, 4 Apr 1994, Carl G Heinzl wrote:

> My first attempt at this mail bounced - here goes again...
> 
> >more equipement and solve this problem eventually. Then, depending on my
plan,
> >if the first dive is going to be in the 120-150 foot range, I would make it
on
> >air, then switch to nitrox for later dives for more time at shallower depths.
> >Just looking for comments...
> 
> Well, there are tables and computers for diving on air and there are
> different tables and computers for diving on nitrox but is there a way to 
> hop from one to the other???  


Both ANDI and IANTD teach the use of the equation:

                  EAD=[((1.0-FO2)(FSW-33))/.79]-33

Using it you can plan all your dives with whatever air tables you use.

Or use your air dive computer.  Great safety margin with Nitrox and 
unless your dive profiles are extremely square,  you'll probably get just 
as much, if not more, bottom time out of it.

RJ

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