Air consumption

[m3830431]

http://www.spearfishing.org/bruces_tips/java/sac.html has several calculators, but more importantly they have the formulas for figuring things out for yourself...

I like that link

 

[BigTuna]

Ive heard this mentioned while diving at a constant depth but how meaningful is it if you're kneeling there. Kneeling would rule out many of the gas theives and nt much of a diving metric. For a static value you could sit on the couch and suck dowm 500 PSI and time it.

It would give you a lower bound for your active, in-water SAC rates.