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At 03:49 PM 1/15/99 EST, Scaleworks@ao*.co* wrote: >You can do all the dive planning and proper gas management that you want, but >in the end, all a Y valve gives you is another regulator to an empty tank. >Lets say your down to 1500 psi in >your single tank, you are 130' and your backup reg on the Y freeflows, ever >have a free flow at 130'? As you realize your situation, organize your >thoughts, extract your arm from the hole you were digging in, find the valve >and shut it down, your tank has already completely drained to ambient >pressure. This IS EXACTLY a failure in dive planning and gas management. Why would I be ANYWHERE but on my way back to the hook at 1500 psi? With a 3000 psi cylinder, that's HALF, and with a 2640 is HALF + 200. Where is your turn point for non-penetration no-deco dives? You can construct many of these kinds of scenario. In the end it comes down to planning the dive, with contingencies. Art Greenberg artg@ec*.ne* -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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