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At 08:33 PM 9/15/98 -0400, you wrote:
>There is a difference between a working PPO2 limit and a resting PPO2
>limit.
>
> Jim ( Cobb )
Bingo ! As I stated, EAN 30 to explore the "top" of a "deep" wreck is a
recipe for disaster. Its negligent and contrary to standards. And yes, we do
all take some gases deeper than their MOD ( stage / deco ) but we also
follow the protocols inherient for this type of diving. Oxygen guards,
colored regs, touch markings, large MOD labeling and coloring. Serious
protocols for serious diving. This is far different than mounting a gas on
your back too hot for the site, breathing it off your primary reg for the
duration of the dive and just remembering not to descend past 120 FSW, or
praying you don't have to dive past 120 FSW to rescue someone. Or some
equipment failure or malfunction causes you to for-whatever-reason descend
past 120.
"And in the highly unlikely event" ( sorry PADI ) that you should encounter
any sort of exertion or stress while diving "only the top of a deep wreck"
at 1.48 PO2, you run a serious risk of CNS toxicity. Current, stress,
dehydration, hard-brathing reg., and a whole host of individual
susceptibility factors are just some of the many reasons I would not allow
my students or customers to dive with a 1.48. Not to mention its SIMPLY
CONTRARY TO ALL THE FUCKING STANDARDS. Um, everybody remember the standards
? I don't care if you are talking about PADI, NAUI, ANDI, IANTD or TDI
standards. It's against the standards. Especially if you throw in the
exertion and/or cold water conditions that further reduce the permissible or
recommended max PO2.
Blend for the sand, play the "what if" game over and over and over, consider
contingencies, maintain you gear, be responsible for yourself first and
foremost and always, observe rule # 1 (even in the jacuzzi ), THINK !
T H I N K ! ! !
Think folks, think. Just because it says something in a text book or its
what was taught in a course does relieve any of us of the serious
responsibilty of thinking about and constantly re-evaluating our diving.
Yes, I know destroking is painful. My head started to spin when I began to
educate myself about 80/20 and holgartian and DIR and long hoses, etc. .
Now, in retrospect, I have seen the light at the end of the tunnel and it is
not the on-coming train. De-stroking is painful and personal, but the
rewards are permanent and well worth the effort.
I will now start sipping my morning coffee again and put the soap box back
under the desk.
Kevin
" You'll never miss the water,
until the well runs dry . . .. "
as sung by Bob Marley
[\]
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^^^^^^^^^^^^^^^^^^^^^^
o o
o o
o o
_____ o o
(_/\_) o o o
=( )= oo
Kevin Rottner
--
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