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---Tom Mount <TOM.MOUNT@wo*.at*.ne*> 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, how does this differ from TDI standards ? I hear that TDI is
very upset wtih some of its instructors who are recommending what you
are saying here. Who is right, you , or TDI? I also hear through the
grapevine that the reason you and Brett Gilliam split up was over this
deep air issue, and the endless stream of incidents, like what happend
to Rob Palmer , that surround this guy. Is that true?
> 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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