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Hi Stuart


>You mentioned drysuits in your argument, I just responded!!!

  I mentionned drysuits about the deco-friendliness of Helium vs N2.
Apparently a deco accident was caused not long ago by an uncontrolled ascent
caused by a faulty exhaust valve, or any other inability to dump the
drysuit. Of course accidents should not happen, but they do, and in this
case I think the situation is worsened by how fast the He comes out of
solution. He imposes much slower ascents than N2 does, so the fact that
you're desaturated faster (good!) has its drawback (no mistakes allowed).

  Don't mistake me, this isn't an argument for deep air, though, but N2 is
not the devil some pretend it is. The only acceptable argument against it I
have read until now is the drink-and-drive thing. All the rest is opinions,
ideas, PP but no facts. I'll try DAN.

  Regards.

  Hugo.


-----Message d'origine-----
De : Stuart Morrison <divebimbo@li*.fr*.co*.uk*>
À : Bartolucci, Ivan Jorge <ibartolucci@wa*.fr*>
Date : jeudi 10 juin 1999 21:19
Objet : Re: Hugo's contribution


>>In the sixties everybody used tanks with reserve valves and no pressure
>>gauges with quite good safety results too. Superficially they work well,
>>but what of the internal damage they cause? In the last couple of years
>>there has been evidence of lesions and nerve damage in divers coming to
>>light.
>
>>I'm not aware of those evidences, do you have references, please?
>
>It was a study done by a British team on long term effects of diving, and
>it made a lot of press coverage, not just in diving magazines but also
>newspapers. I think DAN sell it -- I don't have a copy of their catalogue
>so I cannot get the exact title.
>
>
>> Haldanean theory, which Buehlmann is based on, is a century old, and
>>in the last ten years we have learned that there are better ways.
>
>>The last thread about Zplan seems to prove not so many rely on the better
>>ways, though...
>
>People use what is available. Buehlmann is well tested and used but it is
>still based on some out of date theories. VPM seems to be cutting edge at
>the moment but like all new technologies it will take a while for it to
>filter down to us non-commercial divers.
>
>
>>No need for a dry suit here, and air temperature wouldn't make their use
>>very comfortable.
>
>You mentioned drysuits in your argument, I just responded!!!
>
>Regards,
>
>S
>
>
>

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