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At 1:33 PM 10/5/95, IANTD wrote:
>In following recent communications on techdiver I would like to offer a
>few comments:

[snip]

>Advanced Deep Air is a training program to a depth of 160 feet. This
>course is intense in skills developed through the process of accident
>analysis and combined with a risk benefit projection by the student. It
>is heaqvy in stress management skills that duplicate knowm situtations
>that have led to accidents. The theory is that by training divers to
>react and control these events in simulated siturtation that the diver
>will be more capable to managing the same situtation in a real life
>predictment. It is also invloved with detailed dive planning, deco
>theory, and gas management. Like ALL IANTD courses it requires a
>minimum specified amount of bottom time and dives. It is time in water
>that makes quality divers and thus the emphasis on bottom time.

For me, this is at the heart of the debate.  Why is air to 160 required
before trimix?  All of the arguments that I've heard for deep air center
on the reduced costs and increased availability of air as a deep diving
gas.  The critics cite safety.  If trimix is safer than air at this depth
(and *absolutely no one* has told me otherwise), why isn't it posible
to take an IANTD trimix certification to 160 instead of an air certification?

Thanks,
Scott, who will be taking level 1 deep air on the 28th.

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