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From: "Stuart Morrison" <divebimbo@li*.fr*.co*.uk*>
To: <techdiver@aquanaut.com>, "David Reinhard" <reinhard@oc*.co*.au*>
Subject: Re: Re Last Stop Depth
Date: Tue, 8 Jun 1999 19:16:29 +0100
> "If you have done sufficient deco, then spending further time in the
water is
> increasing your risk.  OK, this risk is small but never-the-less a risk
and
> it bites some people.  Doing excessive deco is therefore not adding
safety."

Every minute of time underwater is a risk. Being there unnecessarily
increases the risk therefore. Also increasing stop times leaves you cold,
tired and dehydrated; excess time on O2/nitrox is increasing the O2
exposure needlessly. Anywat, it is debatable how much effect increasing the
shallow stop lengths will have. If bubbles are going to form they will have
done so before 3m/10ft and you can stay there as long as they like, they
will not go away.

 If you want to add safety my feeling is the best way is to start the deco
sooner (i.e. deeper). Pyle stops are perhaps the easiest way to do it.

> 	It has also been mentioned that Zplan adjusts all stop depths if you
> change the last stop depth. I had noticed this and have found it
> inconvenient compared to other software that keeps the same standard stop
> depths and only adjusts the last stop. I guess I didn't consider the
> possible effect of this change on the total deco time. I noticed another
> post on this list about a new shareware deco program that does not do
this,
> so I would be interested in having a look at that program when it is
> available.

It is already complete, I just need to look at how best to distribute it
outside the UK. Will keep you posted.

Regards,

Stuart.
--
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