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If there was no better way to judge your gas consumption, then maybe this would be useful. Keep in mind that you have to compensate for pressure at average depth. I use an Aeris Atmos AI Dive computer. It knows my starting pressure, average depth, and ending pressure. From there it is very easy to calculate SAC in cf per minute. This is much more helpful to know when dive planning. IMHO
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* If you're not the lead dog, the view never changes *
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