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Old 26th November 2006, 22:47   #39 (permalink)
Gilles
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Megalodon

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Join Date: Sep 2005
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Re: Change of diluent?

Quote: (Originally Posted by jmurba) View Original Post
HI aldo,
I keep my dil all dive long,
back on the zodiac I switch straight on Beaujolais (((:-
to be serious I would never go from trimix to air dil on the acscent, don't know if it is true but i fear isobaric counter diffusion,

and U ?

regards

jean mi
Of course no swiching to air, but could one use your bail out gases. Eg, for the sake of simplicity, flushing your loop with off board EAN 50 at the end of your 20m stop? Maybe switching to a less He rich Tmx (used as part of bail-out) on or near bottom?

Other switches (not using air but less rich He) seem to create more significant deco advantages (according to VPM).

What I'd like to get to, are applied ICD risk mitigation measures. VPM has a default 0.5 ATA dPN2 setting. Someone here posted a rule of fifths. Haven't found a lot of discussion about this yet.

The principles, if any, could provide a range of interesting and effective bail out and on-loop deco planning. This of course, on how difficult it is to correctly execute in reality.
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Last edited by Gilles : 27th November 2006 at 04:26. Reason: small improvement
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