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Why don't you guys start up a Rebreather mailing list - kinda like Marks
wreckdiver one - then we wont have to listen to all your shit either.
X-POP3-Rcpt: anscott@ne*
Return-Path: owner-techdiver@aquanaut.com
Errors-To: owner-techdiver@aquanaut.com
Date: Mon, 13 Jan 1997 19:36:18 -1000 (HST)
From: Richard Pyle <deepreef@bi*.bi*.ha*.or*>
To: Barry Miller <rat@ne*.co*>
Cc: "'cavers@ge*.co*'" <cavers@ge*.co*>,
"'techdiver@terra.net'" <techdiver@terra.net>
Subject: RE: D.E.M.A. SHOW
> Rich,
> Are you saying that they have solved all the problems and that
> they now have a waterproof O2 sensor that works. I want some of that
> Wonder Icing you have on your cake.
I guess my point was that the feature that George seemed so enamoured by
is one of the more trivial solutions Stone has come up with to solve
classic rebreather problems. Moreover, George latched onto the secondary
purpose of that feature - the primary purpose is to verify the accuracy of
PO2 readings in real time at any point during the dive with a 10-second
distraction -- analogous to glancing at your pressure gauge on an
open-circuit dive.
The real cool stuff - the stuff covered in the pages of my non-disclosure
agreement with them - have to do with things like prevention of water
getting on the absorbent in the event of a flooded loop (allowing the safe
use of LiOH as an absorbent), oxygen control systems, warning systems,
bailout systems, and some other stuff. Together with adequate levels of
training, these "tools" expand the magins for error on deep dives
dramatically.
> And to think just this past weekend
> there was no solution to this fatal design flaw.
There has been a solution for about 5 years. A very simple one, in
fact. The problem is, nobody other than Stone seems to have picked up on
it.
> The "Experts" at DEMA must be surprized. >
I'm sure they would be.
Aloha,
Rich
P.S. I only managed to get a few seconds of video this past weekend, but
I appreciate the pointers you suggested.
--
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At 21:22 13/01/97 -0800, you wrote:
>The following established underwater filmmakers and photographers have more
>than 150 hours on BioMarine rebreathers and have had no problems with O2
>sensors underwater:
>
>Howard Hall (300+ hours)
>Bob Cranston (300+ hours)
>Mark Thurlow (camera assistant, 150+ hours)
>Marty Snyderman (100+ hours)
>Rod Farb (170+ hours)
>John McKenney (150+ hours)
>
>Established underwater filmmakers and photographers who have recently bought
>BioMarine units:
>
>Mike Severns
>Al Giddings
>
>The point is that the BioMarine unit meets their requirements for
>reliability, performance and price, and the unit will do the job that they
>want it to do. Which is why twenty-five sport divers have ordered BioMarine
>units for what they want to do.
>
>In the military, there are more BioMarine designed mixed gas rebreathers in
>use around the world than any other CCR, and with more than millions of
>man-hours of use and refinement, no one has suggested removing the sensors.
>And recently, the Brits just adopted the Mark 16 triple-sensor rebreather
>for its forces.
>
>In commercial diving, the have been more BioMarine rebreathers in use than
>any other mixed gas CCR, because they do the job, sensors and all..
>
>As far as cave diving goes, the only type of unit that has been used to set
>world records, individual records, US records and all that stuff if you are
>interested in records are semi-closed units whose operation is tied to
>respiratory minute volume (RMV)- Islers one-off unit who showed everyone
>what could be done in caves with a semi-closed RMV unit and the Halycon who
>broke Isler's record. Why do these folks use RMV units in caves- because it
>works best for them and meets their job requirements.
>
>As far as recreational diving goes, the unit that has the most sales is a
>semi-closed system built by the granddaddy of rebreather manufacturers,
>Drager, and its Atlantis rebreather with 1000 worldwide sales (according to
>Drager). It is relatively inexpensive, $3500, and is a no-brainer to
>understand and operate and makes a good deco unit for deep dives on OC or
>CCR. Why are divers buying this one? It fits their needs pricewise,
>maintenancewise and braincellwise.
>
>Which unit do I think most rebreather wannabes are going to buy in the
>future? The ones named above based upon need. Rod
>
>--
>Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
>Send subscription/archive requests to `techdiver-request@aquanaut.com'.
>
>
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