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Date: Fri, 31 May 1996 11:47:56 -0700 (PDT)
From: "Peter N.R. Heseltine" <heseltin@hs*.us*.ed*>
To: Chris Hellas <chris@de*.de*.co*.uk*>
cc: Barrie Kovish <bmk@ds*.bc*.ca*>, techdiver@terra.net
Subject: Re: Physiologic safety parameters for SC rebreathers

On Fri, 31 May 1996, Chris Hellas wrote:

> >The Atlantis I uses a laser bored synthentic semi-precious stone and
> >requires a closed test on the surface to ensure that the system fills. The
> >only available orifice in the US is the 7.5 liter one.
>
> The other orifices are now being shipped in the UK.

I am concerned about using orifices that have higher flow rates but much
lower FI O2s. Particularly when ascending rapidly or excercising hard at
25-40 fsw. What do you think?

-ph

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