It makes sense for the parents not to in the water during cert. That way there's no conflict of who is in charge, ie: the instructor. We stayed on shore for this very reason when our daughter got her o/w cert.
I have to disagree. When my daughter was certified at 10 years old, I was there for the entire class, and every dive. I'm glad I was because the first dive in open water, the dive master who was assisting didn't realize Sammi was having a problem equalizing. She was giving the distress signal, but he thought she was just a little nervous. He kept trying to take her deeper until I stepped in.
Incidentally, this was a fantastic divemaster who I trust completely. He simply misunderstood a signal --as her father, I knew it was something other than anxiety.
On her AOW course this past year, at age 12, I was also there. I was a DM myself by then and tried to assist the instructor but not get in the way. No problems but I'm glad I was there.
If any LDS, instructor or anyone else tried to tell me I could not be present for one of my child's courses, we would be changing instructors --period.
I am now an instructor myself and I would not even consider teaching a child without one of his or her parents present for every dive.
There was never any question of who was in charge --the instructors always ran the class. I tried to assist wherever I could in an unobtrusive manner --but I was there.
Jeff