Coldwater_Canuck
Contributor
Sorry, that makes sense (although I'm surprised it's a requirement). What I meant was that while they can check periodically, only the individual diver can keep a close eye on their own gauge. A divemaster checking is a nice backup plan for you, but I think it's reasonable that divers check their own air.That's not unrealistic, in fact, it's a requirement and is quite easy to do.
After maybe 10 minutes, you get everybody to tell you their tank pressure. Since you know what they all started with, you now know who's sucking a lot of air and have a good idea how long they'll be able to stay.
After another reasonable interval (based on how far they sucked the tank down in the first 10 minutes) repeat until the minimum planned pressure is reached, then start the ascent.
If you're a DM and are going to let your guests run out of air or swim into dangerous holes, they don't need you, they can do that all by themselves.
Terry
But really the problem I have isn't even not being more safe with a divemaster: I'm fine with that, I can check my own air and everything. What I take issue with is the possibility of being less safe with a divemaster there.