Web Monkey:
#1 is a loaded question.
How many new OW divers even know that a BC can fail, or that there can be a downcurrent coming over the edge of a wall or are prepared to have a complete stranger come up from their blind side and mug them for their primary?
I agree that any of that could happen. But I've never seen any posts about somebody dying b/c they got caught in a down current. I've heard a couple of stories about BC's failing, but that is also a truly exceptional event. I'll argue that a very, very small percentage of divers are actually "ready" for these kinds of events. No matter who it happens to or when it happens it is still going to be stressful.
I was on a night dive in low (5-10 ft ) vis and had somebody come up on my blind spot looking for air. I had less than 30 dives at the time. I got them on air, got the groups attention and we went up. Not all new divers are helpless. It helped that I tend to focus under pressure instead of panic. It helped that the other diver was as calm as soon as they got my air. It can be done.
The reason new divers are recommended to stay shallow is that if the **** hits the fan and they follow their primary instinct of bolting to the surface, they'll probably live.
Every foot of additional depth reduces the time available to handle emergencies, makes the diver more narced and makes a bolt to the surface less likely to be sucessful.
Terry
I agree. There are many good reasons for staying above 60 feet. I don't think that "because the book said so" is one of them. You can never know for sure how you react to a situation like that until it happens but you can get clues. And if you start to get clues that you can handle it then you can trust that.
I'm certified, my wife is not. Wife thought that she wanted to dive but didn't know for sure. So we went on a snorkel trip that goes near the dive site I wanted to hit. She loved it. I looked into a "resort course" for her that went to the same spot. But their policy was to load them up on a boat, go to the dive site, pull the tourist down and make them follow the DM. No pool training, no class time. I said, "No freaking way." Because even if there was class and pool work, I know that my wife would not be comfortable going out on a boat and just droping down into 40-50 feet of water. She tends to bolt.
Instead, we got her into a course that did some class and pool work and then went on an easy 15 foot shore dive. She didn't make the dive. She didn't like being 2.5 feet under water kneeling on the bottom of a pool, let alone being in the ocean.
I'm just saying that you have to take people on a case-by-case basis.