Scott wrote:
>
>
> The recreational SCUBA industry is *slowly* coming around to what GI, JJ,
> GUE and DIR have been preaching for a while now, with PADI being the first
> one to try and market it, which fills me with mixed emotions.
>
> As far as I know, Dan Volkers pages are the only ones on the net with any
> information concerning recreational use of He.
>
> Instructors and agencies, what courses do you offer, to enable recreational
> divers to take advantage of triox diving, in the recreational envelope?
>
> If you offer none, why not?
>
> When will you?
>
> Scott

Hate to break it to ya, but hyperoxic mixes have been around for at
least 122 years. One reason Cousteau decided to build his own rig was
two oxtox hits on LePrieur gear back in the 30s. If "GI, JJ, GUE, and
DIR have been preaching it for a while" we can only ask where the hell
they were sleeping during the 20th century.

Hyperoxic H mixes have all the downside of any hyperoxic mix: oxtox,
depth restrictions, measurement and monitoring requirements, O2
handling, blah, blah. Their only advantage is reduction of equivalent N2
depth. Problem is, hyperoxic mixes limit ya to depths at which, for
most, narcosis is not enough of a problem to bother with the expense and
hassle of 3-gas mixes.

If ya get dark narc at 117 on a routine dive, ya may have problems that
Helium ain't gonna cure.

regards
El Stroko Guapo