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> > On Sat, 25 Nov 1995, Jason Rogers wrote: > > > Yes you have acess to all the gas, but you forget, only to the *remaining* > > gas. In the event of a freeflow, chances are you will have lost *more* > > than half your gas overboard. > > > > That is to say with independents you can lose up to half your gas, with > > manifolds you lose some amount, which may well be *much* greater than > > half (like "all" for instance). > > > > Cheers Jason =:) > > > > > > What about an isolation manifold.... dived with the tanks isolated? > The plan (of course) being to shut off the free-flowing reg, then open > the isolation valve? > Regards, Bernie Woolfrey > -- Yep, that sounds great! the best of both worlds, till you think about it. The whole idea of these things is to make it easier during the dive, (at the expense of making it harder during an emergency). Surely it is harder to loosen the crotch strap, lift the set, and open the valve than it is to just change regs, (which can be done no hands if need be). It can be a killer too. I know of a diver who practiced opening the isolation valve in shallow water before setting out on a big dive. (sensible precaution!) Trouble was that really deep, he needed his wings fully inflated. Discovered that he couldn't reach his valve! (at +100m, in a current, on a line, after he exahusted the first cylinder) He didn't die because there was someone there, and on the spur of the moment he made up a hand signal meaning "if you have a second, could you open this valve for me?". Amazingly this strange gesture was understood! Cheers Jason =:) >
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