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Here's another hit if you're using a computer.  I use one as a bottom timer
because I was not smart enough to just get a bottom timer and use tables.
On my computer I don't put  in 100% O2 because at 20 foot it's at 1.61 and
gets a violation.  I program in 90% O2 and set the gas switch to start at 23
foot, this way bouncing between 22 foot and 2 foot on O2 doesn't violate
anything and allows my computer to stay happy as I'm still on my deco gas.
Usually violates out on the second dive as my tables always get me out of
the water faster.  Doesn't violate the 1.6 rule and start screaming at
me.....

Art.


	-----Original Message-----
	From:	Einar Hagen [SMTP:einar.hagen@un*.co*]
	Sent:	Friday, June 09, 2000 4:36 AM
	To:	Ian Puleston
	Cc:	Techdiver
	Subject:	Re: Oxygen Toxicity - using 100% in open water

	Screw your computer!!! On O2 at 20 feet you should worry more
	about the physiology issue that keeping your little toy happy.

	Sell your computer to someone that you dont like, and
	buy a decent bottom timer and lessons in deco-theory.
	It will freak you out for couple of dives,
	but it will make sense in a very short time.


	Einar


	----- Original Message -----
	From: Ian Puleston <DiverIan@pa*.ne*>
	To: <techdiver@aquanaut.com>
	Cc: Paul Braunbehrens <Bakalite@ba*.co*>; David Chamberlin
	<dwc@na*.co*>
	Sent: Wednesday, June 07, 2000 11:14 PM
	Subject: RE: Oxygen Toxicity - using 100% in open water


	> > I actually try not to monitor *too* closely.  It makes the hangs
seem to
	> > take even longer (that whole watched pot never boils thing).  I
	> > generally make sure I keep it between 22FSW and 18FSW, which I
find is
	> > pretty easy even if I'm not monitoring that closely.
	>
	> I have a question here. Like Paul I currently do deco on 50% and
will
	> hopefully be getting certified for 100% soon (anyone in the
Monterey area
	> want to make up the numbers for a technical nitrox class with
Wings in a
	> couple of weeks?). I know a number of people on this list advocate
not
	using
	> dive computers, but the reality is that many of us do, and a dive
computer
	> will give a violation if you go above your ceiling. So on the 20'
stop, if
	> using a computer you need to stay a little below 20', hence
presumably
	> reducing the margin for downward error if on 100% O2. Correct?
	>
	> Ian
	>
	> --
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