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Date: Fri, 24 Dec 1999 10:11:19 -0500
To: kirvine@sa*.ne*, QUEST@GU*.CO*
From: Charlie Roberson <charlie@gu*.co*>
Subject: Re: SAMPLE DECO DIVE - 220 FOR 25
Cc: techdiver <techdiver@aquanaut.com>
At 07:43 AM 12/24/99 -0500, kirvine@sa*.ne* wrote:

>5) slow final ascent - the last move up to the surface is one of the
>most critical. No matter how long you sit on a stop with the window wide
>open, there will still be gas that will not be displaced by this method.
>When you increase the gradient by trying to surface, the last of the gas
>comes out rapidly and does so in bubble form. You must do a slow ascent
>to reduce the risk of this, and for long dive it is one foot per minute
>to the surface, for this dive it is more like 2.5 - 3 fpm.


I have seen evidence of this in a dive buddy.  We made a slow but direct 
accent from 20' after a thorough deco and he suffered the consequences.  I 
have since adopted the practice of adding 3min safety stops at 15', 10' & 
5' with very good results.  Of course, we always do surface deco 
appropriate for the dive.

Are you going to back gas for your final accent?

Charlie

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