Results

RMV (surface)

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SAC (pressure / min)

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normalized to surface (1 ATA)

Gas used (surface)

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Avg ATA

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used for surface-equivalent conversion

RMV vs SAC: RMV is your breathing rate in volume per minute at surface pressure (cu ft/min or L/min) — tank-independent. SAC is the same idea expressed as pressure per minute for a specific tank, useful for back-of-envelope checks at a known fill. Multiply RMV by ATA to get actual at-depth gas consumption.