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I think Doug is correct.  If you are reading off the new US Divers
catalog tank specs, they are totally botched.  Some companies used to
give buoyancy figures empty w/o valve and some wizard probably matched
these with the full w/valve buoyancy figure which threw their charts
off.  Doesn't matter what kind of tank you put the air in, the air will
still weigh the same. -KL


Douglas Buckley wrote:
> 
> Mark,
> 
> It is 0.075 lbs per cu foot of air, so you can get the real number for your
> self.
> Sometimes theygoof it up by including/excluding the valve.
> 
> Doug
> 
> At 03:52 PM 4/20/97 -0400, you wrote:
> >While looking over the bouyancy characteristics  LP steel tanks I came
> >across something that doesn't exactly make sense;
> >
> >According to OMS the difference in bouyancy for a 98cf from full to
> >empty is about 8lbs (-7.73full/0empty)
> >
> >The numbers for a PST 95 are -4.75lbs full/-1.75lbs empty.
> >
> >What doesn't make sense is how can the PST change only 3lbs from full to
> >empty when the actual air weighs at least 6lbs?
> >
> >Does anyone have any ifo on this?

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