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Date: Thu, 21 Sep 95 12:36:00 EST
From: "Anthony Martinez" <Anthony_Martinez@cc*.ss*.nm*.go*>
To: Richard Pyle <deepreef@bi*.bi*.Ha*.Or*>
Cc: techdiver@terra.net
Subject: Re[4]: DCS and injury sites

>I can't say much about the value of deep stops on helium dives (where some
>helium-mix is breathed on the deep stop), because I've never had any DCS
>or Proto-DCS symptoms after helium dives, and I've never done a helium
>dive without also doing deep stops (i.e., nothing to compare). Maybe those
>two facts, when considered together, suggest something?
>
>Aloha,
>Rich

On these dives, what is the origin of your deco schedule? (i.e. Buhlman,
RGBM, etc.) Also did you make any modifications to what the schedule called
for in order to account for the deeper stops? The compartment-based models
would seem to penalize you for making deeper stops on helium. Your method
may not produce an appreciable increase in DCS risk, but I'm not sure if
that would hold true on dives with greater bottom times. Then, at the
depths we're talking about (>300fsw?), long bottom times are not very
practical in open ocean anyway. Of course, I'm only thinking about deep
stops on a helium mix, if you're using a mix without helium, it seems to
make a lot of sense. - Tony

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