Hi everyone,
A very simple solution. If something is going on, when asked if you are OK by the dive leader, respond with something is wrong! Don't let your pride get in the way of someone that is trained to help. Most of us do a couple dives and get cocky. Experiance is earned, not by how many dives you can accumilate, but by having the perception to see experiances before they happen, or if they do happen, having the cool collectivness, and calmness, to analize, determine the fix, and taking care of this fix, then using this experiance for further reference.
The failure in this situation, was not, the tank being off, it was not the current, or the long swin back (by the way, was nowhere near where the Express travels). The failure was in not communicating a problem to the dive leader, period.
The first step is to admit wrongness, and not try to place, or divert the real cause of failure.
Tevis, from what I have heard, someone else checked your tank before the dive.
Thanks,
Rick
P.S. I take 3-4 breaths off of my reg, while looking at my pressure gauge, any movement and it is time to check what is wrong. Buddy checks are excellent, but, I have found my tank valve off, also, after a buddy check. I do the breath check as an extra measure.