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Date: Thu, 20 Dec 2001 20:55:15 -0500 (EST)
From: Steve Schultz <se2schul@st*.ma*.uw*.ca*>
To: James Dibbs <James.Dibbs@op*.co*.au*>
cc: "Techdiver@Aquanaut. Com" <techdiver@aquanaut.com>
Subject: Re: Correct Helium percentage

You should try 20/35 instead of 20/23.
As Trey said, you need at least 30% helium to get the benefits.  Your safety is
further increased by diving standardized mixes.  The standard mix for 50m
acording to GUE is 20/35.

ss

On Fri, 21 Dec 2001, James Dibbs wrote:

> "At 200 feet, this is useless, and 17% is not the right mix for any dive,
> nor does it give any of the benefits of helium in the proper percentages,
> which needs to be at least 30 for diving ( over 100 feet) and 25 for shallow
> deco bottles"
> George.
> After spending a night in Billy's garage on Monday, I was given a crash
> course in mixing and planning dives on trimix.
> I now have a 20/23 mix for 50m dives. This gives a 33m EAD.
> Regarding your comment above, what maximum EAD do you plan your dives on?
> ---------------------------
> Now that I am using (hopefully) the right gas, could you give me the profile
> you would recommend for a 20min 50m dive using 50% Nitrox for deco.
> Thanks
> 
> James Dibbs  
> Sydney, Australia
> 
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