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>Peter wrote:
>
>I am not familiar with how the Bridge II works. Can you modify the oxtox
>value (FIO2) independent of the FN2 ?

You can't exactly set the FIO2 for Oxtox independent of the FN2 for deco.
If you set the Bridge II to a nonair nitrox mix, dive it and then don't 
reset the mix after the dive the Bridge II will default to a safety mode
where the FIO2 = .5 for oxtox and FIO2 = 0.21 for decompression.  

On a slightly different note I believe that the Nemisis Nitrox has some sort
of breathing parameter that measures your air consumption rate.  On a 
semiclosed constant mass flow unit you might be able to use this to
determine if the flow rate is correct while diving.  There are a few 
gotcha's like preasure drop with tank cooling.  

Barrie

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