Trey, don't waste your time with this Quigley, he obviously has no idea what
he is talking about.  It is the same thing from most of these guys.  You can
take the NOAA, AAUS, and all university ADP guys  across the nation and get
the same crap.  These guys do no real diving and prove it all the time by
opening their mouths on these forums.  They are used to the good ole boys
club of do-nothing diving.  They pontificate endlessly at their meetings
about what SOP everyone else should be using, having no idea of any of the
current practical uses out there in the real world.  Most of these guys
think that their petty fish counts on reefs at 30' is applicable to the
stuff we are doing.  They couldn't be more wrong. The only ones that have a
clue about any of the stuff you are talking about is the petroleum and
commercial dive industries. It is obvious that they don't share their info
with the know-it-alls of the recreational and academic dive industries.  I
wonder why that is?  Mr. Quigley here is content to share the academic
knowledge he read, no doubt, in his outdated NOAA dive manual.  The usual
worthless information that most of us found out was wrong about 15 years
ago.  Funny, that when we tell them that this stuff is wrong, they balk and
continue to recite outdated, dangerous and ludicrous SOP from their precious
manuals.  They have no reason to even wise up about the stuff they are
ignorant about because they will never need to change any of it.  The reason
for that is THEY DO NO REAL DIVING. Most of them have probably logged less
than a dozen dives over the past year. Nothing but a bunch of hypocrites.
Most of them could not even pull off the weenie dives we do for fun.

Chris



----- Original Message -----
From: Trey <trey@ne*.co*>
To: <ScottBonis@ao*.co*>
Cc: <quiglem@ib*.ne*>; <armantrout@at*.ne*>; <Don.Mcinnis@in*.co*>;
<techdiver@aquanaut.com>
Sent: Wednesday, February 09, 2000 9:01 PM
Subject: Re: Oxygen Limits


> Excellent point, and then we have the breaking techniques that have also
> long ago not only been used to allow this ( elevated ppo2's for deco),
> but to prevent pulmonary toxicity, the second subject so severely
> botched by this "doctor".
>
> In additon, the times and nubmer used by this guy are so off base as to
> be ludicrous.
>
> Them to make matters even worse, these are the same morons who put out a
> table of ridiculous PPO2's with "time limits" for diving, in a vacuum of
> any real application information, which the "training agencies" then
> latch onto and spread to those who use them to die with.
>
>
> ScottBonis@ao*.co* wrote:
> >
> > Hi Martin,
> >
> > Thanks for the discourse on oxygen toxicity but I'm afraid that you
didn't quite get the objective of my query.  You see, I was trying to give
you a chance to correct your own mistake.  But you felt more comfortable in
pontificating and repeating your previous misinformation.  So I shall try to
restate my comments more directly.
> >
> > Your posting to me of 2/9/00 was absolutely correct as long as you were
speaking of the NOAA oxygen toxicity limits.  However when you said
> >
> > << ... If you're going to be exposed to O2 over 0.5 partial pressure
on
a dive for 125 minutes, you should limit the maximum ppO2 at any point of
the dive to 1.4. >>
> >
> > This statement is not only wrong, I'm sure it is violated regularly by
virtually every experienced deep diver on this list.  It is actually
ridiculous to try to propagate this kind of garbage on a list that includes
some of the premier divers of our time.
> >
> > As a simple example of just how stupid your statement is, you are
telling me that for any deep dive I do that includes a total time (including
deco time) of 125 minutes, I cannot use 100% oxygen for deco at 20 feet.
Who do you think you are you kidding?
> >
> > You need to go back and learn the meaning of (and how to calculate) a
CNS oxygen clock.  You will find that it is necessary to consider the amount
of time spent at say, a PPO2 of 1.4, then to figure the percentage of the
allowable CNS exposure that that time represents.  And then to repeat this
calculation for each time period which represents a different PPO2.  And
then to add all of the percentages to arrive at the total for the CNS clock.
I personally try to keep this total to less than 50%
> >
> > But to say that the maximum PPO2 allowable is a function of the total
dive time (without considering the various PPO2's for the different portions
of the dive time), is absolutely ridiculous.  I strongly suggest that you
take a certification course before using any Nitrox blend or if you have
been certified to use Nitrox (I hope not so your comments would be simply
out of a lack of training), get your money back from your instructor.  And
for goodness sake, make sure your brain is engaged before
> >
> > And you also owe a "thank you" to Trey, Arman and Don Mcinnis for caring
enough about your safety to comment on your posting.
> >
> > Take care and better luck next time.          Scott
>
>
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