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At 04:24 PM 12/22/2000 -0900, Alex Vasauskas wrote: Hello Alex, >For approximately the same volume, the steel cylinder is lighter and neutral >when empty, so I don't need extra weight to be balanced. This, exactly, is one of the flaws in your argument. Your weighting system has to be ditchable in the event of an emergency. You can't use parts of your life-support system as ditchable weight. If you need to take your stages off to enter a wreck (or you're diving a cave), you'll end up unbalanced and underweighted. If you use the stage to weight yourself, you won't be able to take it off. Yet another problem with steel stages is that their weight is distributed in all the wrong ways. The OMS 'drags' through the water laterally when clipped as a stage. The aluminum tanks tend to streamline longitudinally through the water or float butt-up in the lee of your shoulder so they generate very little drag. As for having the extra volume of the OMS 46, you don't (or shouldn't) need it. I don't know what kind of dives you do, but my buddies and I routinely dive past 300 feet for upwards of 25 minutes. We deco on an aluminum 30 and 40 with 50% and 100% oxygen and still have enough deco gas left to do a second dive in the 200 foot range for 40 minutes. If you need more gas than aluminum 30s and 40s can provide then there is another problem somewhere in your system. Hope this helps. -Mike Rodriguez <mikey@mi*.ne*> http://www.mikey.net/schedule.html Pn(x) = (1/(2^n)n!)[d/dx]^n(x^2 - 1)^n -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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