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To: techdiver@opal.com
Subject: Re: nitrox?
From: Jody Svendsen <svendsen@sh*.ne*>
Date: Mon, 18 Apr 1994 17:24:03 -0400 (EDT)

> Given that the N2 is ongassing more slowly than the He is offgassing,
> your decompression -- on a 0% He deco mix -- should be faster, no?

Usually not.  Lets do things with a more normal decompression.  Same 
dive, 200FT, 20min.  On 17/17/66 Trimix, using Nitrox 36 and 100% oxygen, 
decompression time is 36min.  Using air as a bottom gas, Nitrox36 and 
100% oxygen for decompression, decompression time is 20min.  As you can 
see, the Helium REALLY hurts the decompression.  My example using 
normoxic helium was just to make a true apples to apples comparison 
between helium and nitrogen.  

	Jody Svendsen
	MiG Technologies

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