Ok,

This is driving me bonkers trying to figure out...

I have a dive that I downloaded into the dive log software for iphone from a petrel. If I put my tanks in, the app gives me a "consumption rate" of .77 cf/min

Every RMV calculator on the internet I can find comes up with .88 cf/min.

Does anyone have a clue what math the app is doing to come up with .77?

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