Heat Miser
Contributor
So, I've been diving for a couple of years and have logged 72 dives. ....
My SAC averages pretty good at 10l/m or 0.35l/m but to reach that I have to consciously relax
One thing I did recently was buy a Perdix AI, which has a real time SAC rate in BAR (or perhaps PSI for my North American friends ... but BAR's easier because you just multiply SAC Rate in BAR by Tank Capacity Litres to get to Litre per minute). I hesitated buying it, because I was worried that I would stare at it all the time, but it has helped lower my my SAC rate by 40%. In the course of a couple of months.
I'm not certain you need to have SAC rate below 10L/min, to do tech diving. Certainly I don't. I just came back from the Maldives and a couple of the instructors there have 7l/min SAC's they hop out of the water and have a cigarette. So it has nothing to do with respiratory fitness, despite what people say. Buy a rebreather and it won't matter, because they really do measure respiratory fitness.