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    Von,

    If you are having troubles selling a mix coarse based soley on the
narcidic properties of Helium vs Air then you may want to promote the
physiological aspects beyond N2 narcosis.
    This would make the risky act of having a student jump from mix to air
at any depth irrelevent.

    John


----- Original Message -----
From: <bigvon@be*.ne*>
To: <Rrsankey@ao*.co*>
Cc: <techdiver@aquanaut.com>
Sent: Friday, December 10, 1999 5:28 AM
Subject: Re: Hessian Scorecard


>
>
> Rrsankey@ao*.co* wrote:
>
>
>     Trout says taking students to 170 is dangerous
>
> > Von makes "narcosis drills" at 170 on air a requirement in his "tech
nitrox"
> > course
>
> This is typical disinformation from you sankey.
> I will bring a 30 cu ft air stage with me when teaching mix. If the
student
> wants, (his choice only) I will let him breath on the stage at 170' for a
minute
> or so.He can experience narcosis. Most students do not believe the amount
of
> impairment on air, and this exercise shows them the difference. I remain
on mix
> the whole time, and 170 feet is sufficient for the demo.
> If this is promoting deep air so be it.
> Von
>
> --
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