"Charlie Hammond" wrote
>>> Actually, some of us can: mostly-full lungs at the start, mostly empty
>>> at the end. Buoyance change isn't that great unless you're coming up
>>> with only 100# pressure.
>>
>>Correct.
>
> Nope.
>
> For a given cylindar, bouyancy change depends on the DIFFERENCE between
> starting and ending pressure. The actual staring and endig PSI (or BAR)
> is irrelevant. For larer capacity tanks there will be a greater
> bouyancy change for any given pressure difference.
I think that's what he meant. The presumption in his statement, at least as
I read it is that the shift is not that great (5 lbs) unless you breathe a
full tank down to 100 psi. No other interpretation seems to make sense. If
I'm reading it right, he's correct. So are you.
Lee
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