mala
Contributor
Well, isn't this thread just getting a bit hijacked, so I only have one more comment.
I don't see anywhere in the original post asking how to do this calculation underwater, but in any case, I wouldn't bother with either the metric or imperial calculation to save my life on a dive, I would be heading for the surface hoping I (and my buddy) have enough air for the journey.
the op asked how to do the calculation above water.
for recreational diving i guess it doesnt matter much.
if you were sharing air with your buddy and had a bit of deco it would be handy to do the maths rather than end up on the surface heading for the chamber.
do the maths and save yourself the stress of hoping you have enough air.
i'm not having a dig just airing a few thoughts.
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