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To: techdiver@opal.com
Subject: Vairible O2 non-rebreather
From: "Terry McCracken" <terrym@it*.ns*.co*.au*>
Date: Thu, 23 Mar 1995 17:07:33 -0500
Hi Folks
	I just wanted to throw in an idea to see what everybody thinks..

I am looking at a situation where I don't have a re-breather mostly ecause of
cost etc.

The unit I am thinking about would be open circuit. It would have two tanks,
one of air and one of O2. The O2 would be added realtime to the breathing mix
at a fixed ratio dependant on the depth/volume. Other factors don't come into
play because the gas is not being rebreathed. This would allow you to set a
particular PO2 and then ride this up your various decompression stops. You
could get onto it as soon as air was safe for that depth. This would save
having to carry more than one nitrox mix + O2 etc. You would maby still want
an O2 sensor installed just to check the addition valve wasn't stuck.

	Could the experts tell me how much this would reduce your deco
obligation by, and wether this a viable idea.

						Later
							Terry

-- 
Life`s ABYSS, then you dive

********************************************************************
 Terry McCracken		 GEC ALSTHOM Information Technology 
 Software Support Engineer       Ph:  61 2 415 0509 
 terrym@ns*.co*.au* 		 Fax: 61 2 417 8635 

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