Thanks for posting and I'm glad it turned out okay.
I'm curious about your statement above, though. It's not like you'd be ratting out a friend when you're in grade school. This is a business, and it should be taken seriously. Not sure what it is that is the big secret, and IMO there shouldn't be one. It sounds like you weren't "upset" because you've taken a lot of the responsibility on yourself (and appropriately so, there are things you've learned from this). But that doesn't absolve the DM from the responsibility selecting appropriate dive sites for the divers in the group (and dive #5 to 105' is not appropriate) and giving a full and proper briefing, including boat procedures, signals, and so on. You got poor service, regardless of whatever mistakes you might have made, and failure to point that out only serves to ensure that that level of service continues.
Off the soapbox. Again. I'm glad you learned from this.
-kari
Couple of reasons, actually. She was obviously "junior" on the boat, the other divemaster and captain were in charge. She asked many questions of them both on the van ride to the dock, and while on the boat. I felt it served no purpose to tell her superiors (her boss) that she set my gear up on an empty bottle. Secondly, the apologies were genuine, she meant it.
I felt that she learned something too, check your customers gauges, they may not be. I think she realized how this could have gone very bad, had the older, inexperienced diver gotten my tank. And you're right, I was more than a little surprised they let him go that deep, in a pretty healthy current, with only five dives under his belt...
While it is my mistake, on the boat I regularly dive in Kauai, the captain or dive master checks every diver out right before they go in. I've watched them open closed valves more than once...