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To: techdiver@opal.com
Subject: re: restrictions on diving (was: Re: ultrasound)
From: N.A.Harman@sw*.ac*.uk* (Dr. Neal Harman)
Date: Wed, 13 Jul 1994 14:47:46 +0000

>The UK Cave Diving Group (CDG) has been
>using mixed gases for the past 20 years.

I sort-of doubt that --- there are very few places it would be useful, and
most of those have been relatively recently discovered.  There is certainly
an increase in nitrox/trimix use of late.  Are you thinking of the extensive
use of O2 rebreathers ('til the early 60s)?  On the other hand, it is difficult
to say anything with any certainty about the CDG 'cause its a very loose
organisation that can only be united by an attack on its right to total
anarchy :-)  There are no rules about what/where to dive, what gear to use,
how deep to go --- we just do what we want.


Dr. Neal Harman
Department of Computer Science
University College of Swansea
Singleton Park
Swansea
SA2 8PP

TEL: +44 792 295394
FAX: +44 792 295708

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