> I raised this issue with my instructor (IANTD) a couple of weeks ago.  I'd
> asked why I needed to do deep air instead of tech. nitrox before trimix.  My
> feeling is that there's no good reason for me to risk disabling narcosis
> on air at 160' when I could dive EAN 27.

I'm not sure why EAN-27 would be a better gas at 160 feet than air, other
than perhaps some decompression advantages.  I'd be willing to bet (and
actually have some first-hand experience supporting this) that your
narcosis would be as severe if not *more* severe on EAN-27 at 160 feet
than air at 160 feet.

Aloha,
Rich

Richard Pyle
deepreef@bi*.bi*.ha*.or*
*******************************************************************
"WHATEVER happens to you when you willingly go underwater is
COMPLETELY and ENTIRELY your own responsibility! If you cannot
accept this responsibility, stay out of the water!"
*******************************************************************

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