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Tom, who said anything about an incident on deep air? Who said anything
about you? Who said anything about IANTD? Tom, what on earth are you
talking about - none of this makes any sense, and I can not understand
the references, or is this not intended to go to me?

 Tom, your number 2 is unintelligeable - what are you saying, and how on
earth could this be anything but a charlie foxtrot? If the bottles are
marked properly the buddy can see what the other buddy is breathing, and
in cave diving we do not cary bottles past their oprating depth.In wreck
the bottles are only breathed on the way up. Please clasrify this -
somebody will take you seriously. 

 Also , please explain how you can teach air at 160 with a 130 AED? How
, or why, would anyone dive Nitrox past the AED of Trimix, and what
earthly pupose could that possibly serve? Tom, I have a degree in math,
and you have obviously discoverd something here that is on par with time
space continuum and and quantum mechanics. I applaud you if it is true.
I once found a way to calulate a yeild to maturity using natural
logarithms and exponents, but ran out of dope before I wrote it down.
Tom, which is it, do we do it right or not?

 Could you also clarify why using a quick dicconnect to rescue a
"student" is superior to rigging the harness properly in the first
place, and why a novice diver is doing a deep trimix dive in the Gulf
Stream if harness and simple things like keeping her fins on is a
problem? I am not sure I am with you on this one. Could you please
clarify - somebody might get the wrong idea here.

  Then , can we review the "Flawed Logic " section of my post and ask
ourselves why this applies to you? Surely , there is some mistake here. 

Tom Mount wrote:
> 
> The incident you reported
> 1.was not on deep air but during descent on a 15 50 trimix
> 
> 2. The reason we wear stages(in training) with different mixes on
> opposite sides in open water (not caves) is it is one extra step of
> precaution for both the diver and the divers buddies verifying the mix
> and gas switches
> 
> In cave we do not care if both stages are on the same side or not
> 
> 3. all tanks are labeled with mix and mod and turned off just as you do
> 
> On subject of deep diving IANTD teaches advanced deep air to 160,
> technical EANx with air to 170/180 . Students with a desire to go deeper
> on air may add dives and go to 190, if there instructor approves it.
> 
> When using trimix we recommend a END of 130 feet as it is
> counterproductive to teach mix if you do not demonstrate its advantages.
> I typicall y do a 270 with between a 90 and 125 END and a 200 with a 120
> END in my courses. The students come away with a great appreciation of
> the benefits of mix.
> 
> Tom Mount
> We RECOMMEND divers use mix on dives deeper than 180 (shallowere if they
> wish) and in overheads 160 once they have been trained.
> 
> Quick releases in open water are a safety step that many may opt to take
> advantage of. They can speed up rescue. In cave diving it makes no real
> difference. It is not a requirement by any association I'm aware of but
> one of the options divers have.
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