Kryssa
Contributor
My longest dive ever was 54 min on an AL 80. Max depth 42 ft, average depth was between 30-40 ft. I'm trying to improve
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I think the better measurement would be of yourself and your SAC rate average. If you are improving your SAC rate average, then you are improving your air usage. My average is 34 psi/min at 50ft. However, I did a performance bouancy checkup this weekend at 20 feet and cranked off a 17.7psi/min over 40 minutes. Didn't do anything but hover and run through equipment and safety checks. Activity and depth have a huge impact on your consumption.
I get around half an hour at 60 ft with 1000psi rock bottom (about 35-40 min with surfacing) Or 50-60 min at 20 ft on a reef.
25 mins at a 100 when used as a stage down to 200-300psi