Jim,

Blue water dives do not require 100 foot depths. 30 or 40 feet is plenty.
For this, air would be my choice. Most of the time I do this stuff, I
freedive it---no tank at all, drop to 20 to 50 feet, and just hang in the
collumn.
Nitrox would be impractical here for many reasons. Particularly for the
recreational diver whose depth monitoring skills are "challenged" at best,
even on a wall dive, a nitrox mix which limits them to 80 or 100 feet is
dangerous at best. If they "think" they can do 90, they may end up at 140
after only a few moments of watching a big pelagic.  If the concept or plan
of the dive was to do 80 to 100, then  190 foot trimix would be a smarter
plan.
Regards,
Dan


> -----Original Message-----
> From: Ocean Diving Inc. [mailto:divetek@oc*.co*]
> Sent: Wednesday, September 16, 1998 3:05 PM
> To: Dan Volker; Jim Cobb; kirvine@sa*.ne*
> Cc: techdiver
> Subject: RE: Deep air dive...JUST SAY NO!
>
>
> Dan,
> What gas do you use on the Gulfstream drift dives? Why? What's the
> difference? They are a lot of fun and recreational divers are
> doing them all
> the time. Recipe for a good time if done correctly, right. Don't
> forget, we
> are talking recreational divers here. Max depth 100'. Bottom time 30
> minutes. Sea floor 1/2  mile below. Big critters, great vis, warm
> water, you
> know the rest. Have some fun with this one.
> Jim
>
> -----Original Message-----
> From:	Dan Volker [mailto:dlv@ga*.ne*]
> Sent:	Wednesday, September 16, 1998 11:33 AM
> To:	Jim Cobb; divetek@oc*.co*; kirvine@sa*.ne*
> Cc:	techdiver
> Subject:	RE: Deep air dive...JUST SAY NO!
>
> Jim,
> Seems the Dereck McKnulty connection rears its ugly head
> again---apparently
> rescue of buddies is operationally ignored.
>
> While Mimms would most likely help his buddy and risk the Ox tox, this
> mindset of planning for yourself only, is one root cause of deaths which
> will continue to plague IANTD until they adopt DIR.
>
> Dan Volker
>
> > -----Original Message-----
> > From: Jim Cobb [mailto:cobber@ci*.co*]
> > Sent: Tuesday, September 15, 1998 6:01 PM
> > To: divetek@oc*.co*; kirvine@sa*.ne*
> > Cc: techdiver
> > Subject: RE: Deep air dive...JUST SAY NO!
> >
> >
> > One thing you are forgetting, Jim. You have removed yourself from the
> > available divers who could help someone who had trouble and sank to the
> > bottom. You you went for it you would be at 1.8 - 1.9 PPO2 and under
> > stress, a recipe for disaster.
> >
> > On your boat do you tell the 30 diver if he sees someone in trouble to
> > just let the stupid bastard sink and head on up? Or do you care?
> >
> >  Jim
> >
> > On 9/15/98 2:03 PM Ocean Diving Inc. wrote:
> >
> > >Did you here the one about the guy that did all of his deco on
> bottom mix
> > >because he was afraid that any other mix might put him in a hot mix
> > >situation during deco if he failed to be responsible for his buoyancy
> > >control? He thought it was too dangerous to use 100% O2 at 20' by what
> > >kirvine implies. Now wall dives on Nitrox are off limits cause
> some dork
> > >might end up needing Trimix while attempting a recreational
> wall dive. At
> > >least in the Caymans a diver can swim towards shore and park on
> > the sand at
> > >20' so he can switch to 100% O2 and not worry about high po2's eh? Use
> > >common sense and you will figure out what's up with this thread.
> > >Semper Deep,
> > >Capt. Jim Mims
> >
> >
> >  -------------------------------------------------------------------
> >  Learn About Trimix At http://www.cisatlantic.com/trimix/trimix.html
> >
> >
> > --
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>
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