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Wait, wait....ok. I read it again...Asbestos and Coke alert! This has GOT to be a troll?? Cobber...this is a Free Fire Zone...I repeat Free Fire Zone. The only bummer is that I think some of the more eloqent flamers are in Mexico right now! Sean This should go on for DAYS. I think I am having Residual Surface Induced Narcosis...I dove last weekend and that fuzzy, kinda silly feeling is still here...or that might be that I'm just bored as hell? -----Original Message----- From: Craig Waldman <craig.waldman@er*.co*> To: techdiver@aquanaut.com <techdiver@aquanaut.com> Date: Friday, March 12, 1999 12:05 PM Subject: Upside down tank mounting - What's your opinion. >Hello Everyone, > >I have been reading this list for a few months now. This is my first >posting to this list. (please be gentle) > >First a little about myself, I still consider my self a baby diver. I have >been diving for 11 years. My most recent certification is as a Commercial >HSE Surface Supplied (Top Up) diver (Part 1 equivalent) I got back from Ft. >Bovisand, Plymouth England only four months ago. I do not consider myself a >Tech Diver yet, but I am learning. My personal focus is on wreck diving and >not cave diving. > >I have been very interested in the DIR methodology. Its practitioners seem >devoted, if not fanatical, about safety, and the furtherance of diving >technique. > >With that said, I would like to open for discussion a possible alteration to >the standard DIR method. I DO NOT currently dive with this rigging method, >but am considering it. I would like your input and suggestions. > > > >While in England I was introduced to the idea of mounting your tanks so that >the valves were mounted on the bottom. (near your butt). At first I >dismissed this as being silly. But after a proper introduction to the >reasoning behind it, I think it has some possible advantages. > >One of my own concerns with this arrangement is that with the tanks being >upside down, any particulate matter in the tanks would head straight for the >valves. (this shouldn't be a problem with properly inspected, and >maintained tanks, but still...) > >The first possible advantage is that the valves are much easier to reach. >If you can scratch your butt you can turn a valve. This comes in especially >handy for doubles with an isolation manifold. > >A second possible advantage. When using round bottom (now top) tanks, you >are even more streamlined, and have greater clearance around your head. >It's easier to look up or forward with NO obstructions behind your head. > >A third possible advantage. Your manifold is less likely to get banged >during a "Push" though an overhead environment. > > >And here is a big one for the Remove all excess potential failure points >fans: > >The Royal navy divers do not use a pressure gauge. That's one less hose. >They employ an interesting method of gas management. > >1- They start with two full tanks Isolated. >One on, one off > >2- They breath the first tank to empty, >then open the second tank >The tanks then equalize so each tank is now at %50 capacity. >They then shut off the second tank, isolating it. > >3- They breath the first tank to empty again, >They then open the second tank >The tanks then equalize so each tank is now at %25 capacity. >This is the reserve point, so begin ascent procedures. > >I'm not sure I would want to dive without an SPG, but in this configuration >the hose length could at least be dramatically reduced. > > > >-- Finally my questions. > >First, what is your opinion on this upside down idea? > >Second, how do you see this would effect the long hose, and other hose >routings? > >- Craig Waldman > New Jersey >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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