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From: "Don Burke" <donburke56@ne*.ne*>
To: <techdiver@aquanaut.com>
Subject: rec trimix
Date: Sat, 7 Oct 2000 12:08:39 -0400
As variation on the same theme, how about 28/35 as a "drop-in" replacement
for air?

It is good to 130 feet under any conditions a rec diver will see.

The no stop times are longer than for air.

The END at 130 feet is about 80 feet.

The only downside is cost.

Don Burke
Chesapeake, Virginia

----- Original Message -----
From: Jim Cobb

Like I wrote in my post I do not discount proper training. And I also
mentioned that you should be proficient in mixing nitrox before you attempt
trimix. But I do submit that you could take a rec diver with 4 dives under
his belt put a tank of 21/20 on his back and the only thing the diver would
notice is a more enjoyable diving experience.

I also submit that a large portion of panic attacks suffered by new divers
is in part caused by the unfamiliar sensation of narcosis. Around here
beginning divers regularly do their training dives in 90+ ft of cold, murky
water, a prime environment for narcosis induced clusterfucks. On any given
weekend you can see these new divers doing panic-stricken free ascents
popping up like mushrooms all around the dive boat.

Now these new divers should not mix their own trimix but perhaps trimix
should be the REAL "safeair" (I still laugh my ass off when I see
potentially toxic mixtures of nitrox labeled "safeair", what genius came up
with that).

Anyway I see your point that some people need training and hand-holding more
than others and should be prepared to pay for it.

Jim

On Friday, October 6, 2000, at 06:46 AM, David B. Widen wrote:

Jim

You do not represent the typical diver. You do the research and reading
before you jump in. Many of these people will just jump in. The reason for
training is to ensure that at least some level of understanding and
knowledge is in place. You are opening a door for people to use something
they may not have the knowledge to use and get hurt.

You know some of the same people I do. Would you want to turn some of those
folk loose on trimix without them getting some guidance? So where is the
line between the between those with enough good sense to doit with out
training and those that need the training to get them on the right road and
doing thing right.

Trimix diving is technical diving. There is more to technical diving them
just having the equipment, some O2, and in this case HE.

David

-----Original Message-----
From: Jim Cobb [mailto:cobber@ci*.co*]
Sent: Wednesday, October 04, 2000 3:55 PM
To: Paul Braunbehrens
Cc: Mcinnis, Don; 'RDecker388@ao*.co*'; scottk@hc*.co*;
techdiver@aquanaut.com
Subject: RE: clarification was: An the beat goes on and on

While I am not discounting the need for proper training, you don't need
squat for certification to dive with trimix. I have yet to see a industrial
gas supplier ask for a c-card for tanks of 02 and He. And as far as the the
air tops are concerned it's pretty much a "don't ask, don't tell" policy at
the dive shops I've visited. If your diveshop is an asshole about this, then
it's time to move on.

Personally I believe that if you are proficient at mixing nitrox and are
currently mixing it on a regular basis, there is no reason one earth why you
can't shitcan your nitrox wrist computer, get DecoPlanner for your laptop
and go trimix diving. It ain't rocket science, folks.

Jim

On Wednesday, October 4, 2000, at 11:41 AM, Paul Braunbehrens wrote:

No kidding! I'm doing it right now, adv. nitrox, stage deco and
trimix just because I want to use He. It's actually ironic that you
have to do a deco class to use trimix. It seems to me they are
separate subjects. You won't get a fill without it though.


Mcinnis, Don wrote:
~
>Bob,
>
>What's the prerequisite in shingles needed to get into it? Usually needed
is
>the advanced nitrox, decompression techniques, and then the "entry level
>trimix" course at least. All this for being able to dive with a clear head
>between 70 and 150'. Scott's point all along is there needs to be a "rec"
>HOTx course with something like a nitrox C-card pre-req to open up He to
>more people without having to go through 4 extra courses (not to mention
>about $2000 or more) just to dive HOTx which is by definition relatively
>shallow (less logistics) diving.
--
Paul Braunbehrens mailto:Bakalite@ba*.co*
http://www.daw-mac.com Mailing list for digital audio on the mac
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