>What on earth gear configuration could make this guy -60lbs? Why didn't >they hook a lift bag to him? Was their END too high for them to function? Jim, I'm butting in and guessing, because I've been doing some thinking about this incident myself. Assuming the guy was diving a decent two-piece (jacket and john) wetsuit (which he needed for the water temps Dan is reporting), he is going to need something like 40 lbs of negative buoyancy to get himself and his suit neutral at the surface. Some of that will be in his tankage and other gear, the remainder will be on his weightbelt. Assuming double 100s, a steel 72 and an aluminum 80, he's carrying about 28 lbs of gas, which the wings are lifting at the start of the dive. At 250 fsw, call it 8.6 ata, for all practical purposes the suit has gone to zero buoyancy, maybe even negative, and his wings now have to "take up the slack" and lift that 40 lbs. We're talking almost 70 lbs of required lift, just to get neutral at the bottom. There was a similar death a year or two ago. The guy was negative on the bottom, with everything inflated. It wasn't until he'd been brought up quite a ways that he became neutral. Thinking about this has about convinced me to start saving for *my* TLS 350. I don't need a problem like this, ever. --John -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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