I'd leave the video camera at home for a while. You have enough things to worry about without using up mental bandwidth on filming.
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I've just started using dive logging software and downloading my dive profiles from my DC, using MacDive and the Dive Log iOS app. I knew I was bad on air and maybe it's normal for someone so new (< 20 dives), but it became immediately apparent to me that I am not only bad on air, I am really quite possibly the biggest air hog on the planet. On my best day I'm around 1.1 cf/min, but this year I'm posting numbers like 1.6 cf/min! On my last dive we were down 19 minutes, and I had to turn back because I was down to 1000 psi (avg depth was 48 ft, started with just over 3000). I was using a Steel HP 130 tank, and I got 20 minutes out of it?! My buddy used an AL80 and ended up with more air than I had left. Out of all the people on this board talking about SAC rates, i've never seen any as bad as what I am recording.
One thing I am doing differently this year is that I am diving dry. Not sure if that is causing this dramatic increase in SAC.
I'm not sure what to do about it really. It's really starting to cause me stress while underwater now, and I'm checking my gauge like a crazy person. I'm sure that is not helping.
Help is appreciated!
I have to say, I'd definitely recommend leaving the camera at home until you get your gas consumption under better control. I don't get mad at new divers who use gas . . . but I'd be seriously annoyed with someone with a video camera who cut MY dive to 20 minutes (assuming you have one of those dive operators who make everybody go up when the first person hits gas).