It's quite helpful for quantifying how bad on air one actually is too. During my last dive trip, I took some friends with me, one of which was notoriously bad on air. After going over the data, we found that in nice relaxing dives, his sac rate is only about 5-10% higher than mine. His problem is that he's not particularly hydrodynamic and is quite short, so when we'd do a dive that required traveling more distance/swimming more aggressively, his sac rate would shoot up to 30% higher than mine. We also found that he tended to average deeper on dives because he'd always be the deepest in the group. Taking these factors into account and changing our dive planning a bit, by the end the trip, we'd all end up surfacing with close to the same amount of air instead of him being 500 psi lower like when we started the week. Data is helpful.
Weight of the air in the tank.
- Thread starter Alan Browne
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It's quite helpful for quantifying how bad on air one actually is too. During my last dive trip, I took some friends with me, one of which was notoriously bad on air. After going over the data, we found that in nice relaxing dives, his sac rate is only about 5-10% higher than mine. His problem is that he's not particularly hydrodynamic and is quite short, so when we'd do a dive that required traveling more distance/swimming more aggressively, his sac rate would shoot up to 30% higher than mine. We also found that he tended to average deeper on dives because he'd always be the deepest in the group. Taking these factors into account and changing our dive planning a bit, by the end the trip, we'd all end up surfacing with close to the same amount of air instead of him being 500 psi lower like when we started the week. Data is helpful.
OP
Alan Browne
Contributor
Always. Just never thought of that data set. Will add it to the todo list for the next trip. Thanks again.
My sack rate is 8h/night and I am relaxed. My SAC rate is 0.4 cuft/min when I am also relaxed.
Dan
Contributor
I started my SAC with 0.9 cfm in 2005 and slowly went down to 0.5 by 2010 & now about 0.4.
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