Surface Air Consumption (SAC) rate measures the amount of breathing gas a diver uses in one minute, normalised to surface pressure (1 ATA). This value varies from person to person and plays a crucial role in dive planning. Knowing your SAC helps you estimate the duration of your gas supply at different depths, promoting safer and more efficient dives.
To calculate your SAC rate, you need to specify the size of your gas cylinder, the starting and ending pressures, the average depth of your dive, and the duration.
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