Just this weekend I did a couple of nice and easy 40 foot reef dives. They were drift dives and I followed an instructor with his students. The issue of air never came up (hell, I never even checked my SPG's). I used the time to practice some of my training drills.
I found the sharks that they missed
The water was a little rough and I thought "they" looked kinda funny trying to change out their tanks while the boat was rockin. I just walked to the back of the boat and jumped in again. I vaguely remember laughing to myself on my descent
