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>
> Rod Nairne Wrote
> >    The 1991 NOAA tests had some interesting results. Apparently,  a
> >convulsion occured on mixed gas after 40mins at a po2 of 1.6.  For pure
> >oxygen, the lowest po2 to produce a convultion was 1.76 ata.
> >
> >One explanation is that mixed gas has a higher breathing resistance due
> >to the greater depths in which it is used. However, there is probably
> >more to it than that, and generally speaking high po2's are less likely
> >to produce symptoms if you are breathing pure 02.
> >...
>
> Chances are when you are breathing O2 you are hanging/resting and with
> your bottom mix you would be doing work.  O2 toxicity is directly related
> to your level of activity.
>
> Safe Dive, Ed.
>
> --
Hi Ed,
I think I saw a report on the tests that Rodney is referring to.  I gathered
that the tests were conducted with similar workloads on the divers.
Cheers Jason :)

>

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