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This is the part that nobody has continued with , other than the oil
companies, but they have no reason to since they dive heliox. It is not
clear how much is needed, or why, but it must be a charge-related thing,
and maybe solubility as well.

To tell you the truth, the more I see it, the shallower I make my aed
for nitrogen. The problem then becomes that you do not have as much gas
due to the lower degree of compressibility.

Bill Mee and I are going to try it on some rabbits to deeper depths to
see if we can get a better picture, and then we will decompress them to
see what combination works best.

 Once we have the levels figured out, we will put in a heparin lock and
do it to me through a tube and bag arrangement under the stereoscope and
just let the blood go. Obvoiusly, I would like to do this in one or two
takes.

Personally, I do not like the feel of a 130 air dive later on, so there
is some kind of damage, so maybe just having ANY helium works, since a
130 trimix dive does not produce the same effect, and a 130 aed trimix
dive does not produce the same ell as a 130 air dive. 

I am just going with what my experience tells me, but now we are in the
mood to take it further to see hat the story is, besides, I like rabbit.






Paltz, Art wrote:
> 
> Hi George,
> 
>         Can you clarify a few things for me?  I've been following this
> and other posts regarding Deep on Air and the sorts.  Below you state
> "nitrogen causes damage when not in the presence of helium beyond ppn2's
> in the 130 equivalent range"  I understand about cell rigidity in the
> presence of high ppn2.  I don't understand how the same ppn2 in the
> presence of Helium would off-set this.  Naturally the depth would have
> to be deeper with a tri-mix to have the same ppn2.  I'm just a little
> confused and want to understand, I assume I'm not the only one out
> there?
> 
>         Knowing that nitrogen in high pp will make the cell walls rigid,
> will introducing some amount of helium into the "mix" (no pun intended)
> lessen the wall rigidity for the same ppn2?
> 
>         A very confused Art.
> Safe diving,
> Art.
> art.paltz@r2*.co*
> Last Dive 8/23/97, SeaGirt(Lobster Dive), NJ, 81ft/60 min bottom, 58
> degrees F, 28% bottom mix.
> 
>         -----Original Message-----
>         From:   G. Irvine
>         Sent:   Monday, September 01, 1997 8:07 AM
>         To:     Peter Heseltine
>         Cc:     Calkins, Rob; techdiver@aquanaut.com
>         Subject:        Re: (no subject)
> 
>         Pete, I forgot about the Fat Slob deep air big mouth arguing
> with you -
>         that was a classic case - you should repost that one on here so
> everyone
>         can see what a really arrogant asshole really is, and why we
> need to rid
>         this business of jerks like that.
> 
>          Pete, a couple of things to add to your discussion here:
> nitrogen
>         causes  damage when not in the presence of helium beyond ppn2's
> in the
>         130 equivalent range, and this makes decompression very
> difficult, and
>         the real problem with narcosis is that it is a judgement
> effector, and
>         it is not easy to spot by the person who has it. For some
> reason, there
>         is a masive denial factor in play here as well.
> 
>         Peter Heseltine wrote:
>         >
>         > I agree with George. Yes, I said that.
>         >
>         > About two years ago, I made my debut on this list because I
> read something
>         > that Brett Gilliam wrote stating that diving the Atlantis to
> pO2's of 1.8
>         > was OK and that a sport diver would never stay down long
> enough for their
>         > CNS "clock" to max out. I spoke out against it, wrote to him,
> this list and
>         > to others (even to Drager) and was told I was a newbie, didn't
> know what I
>         > was talking about, was a stupid fuck and other pleasantries.
> George was one
>         > of the few who spoke out at that time, publicly and
> forcefully, against
>         > deep air diving. And this was before several of the "brightest
> and the
>         > best", let alone other "lesser knowns", died doing it.
>         >
>         > Toda
>         --
>         Send mail for the `techdiver' mailing list to
> `techdiver@aquanaut.com'.
>         Send list subscription requests to
> `techdiver-request@aquanaut.com'.
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