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To: techdiver@opal.com
Subject: re: restrictions on diving (was: Re: ultrasound)
From: awright@gs*.bt*.co*.uk* (Alan Wright)
Date: Thu, 14 Jul 1994 13:20:48 +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)?

My previous statement was wrong, sorry. I checked last night and the
oldest reference to trimix I could find wrt the CDG was Rob Parker
and Rob Palmer around 1984/85. It would appear that divers on mainland
Europe started using mixes about a year earlier (Touloumdjian and
Hasenmayer, 1983).

Alan

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