I'll preface everything below by saying that I'm newly certified and have my first salt water dive planned for Cozumel in a couple of weeks.
Since I will be doing mainly drift diving and as I understand it, we can surface and be picked up by the trailing boat whenever we like (namely, air gets low), I was wondering what should I aim to have in my tank when I return?
My instructor for my course seemed to imply that on most dives, you should start considering working your way to the surface/safety stop when your air gets below 500 psi. Does this sound correct, or should I be more conservative?
Since I will be doing mainly drift diving and as I understand it, we can surface and be picked up by the trailing boat whenever we like (namely, air gets low), I was wondering what should I aim to have in my tank when I return?
My instructor for my course seemed to imply that on most dives, you should start considering working your way to the surface/safety stop when your air gets below 500 psi. Does this sound correct, or should I be more conservative?