KathyDee describes a great experience in which a DMT had to be rescued:
http://www.scubaboard.com/forums/ne...-real-rescue-course-very-close-near-miss.html.
Apparently he was going "solo" to swim from one class group to another when something bad happened. I'd encourage anyone considering solo diving to read that thread. I don't mean to scare people off, but just realize how bad things can happen when least expected.
Thanks for posting the link. Interesting reading, but here is the quote from that post that is most illuminating:
"He apparently left one OW group to swim to another. Based on his location, he most likely got lost between groups. He remembers fear and hyperventilating, then to the surface. It is estimated that his (most likely rapid-non-breathing ascent) occurred in 12-14 m of water and resulted in an embolism in his brain. After 7-8 trips to the recompression chamber he is doing much better and is projected to make a 100% recovery but no diving for quite a while."
I agree that he would certainly have died if he were actually
solo. But, this diver wasn't actually "solo", and was not ready to be solo.
I hope the diver has made a full recovery and returns to diving soon, and I'm not trying to belittle the victim, but this injury was
not caused be being solo, but was the result of borderline panic and a rapid non-breathing ascent. It was not a random "bad things can happen when least expected" incident. The incident as described was self-inflicted and entirely preventable.
And had the victim not been literally
surrounded by instructors, near to a boat with trained responders and oxygen, and on top of that relatively close to medical help he would have died. This has nothing to do with diving solo.
Solo diving is certainly not something to take lightly. There
are situations that only a buddy can save you from, and any diver considering solo diving needs to acknowledge that those situations do exist. You do your best to try to avoid or at least minimize the "no escape" situations if you are going to go solo. There are situations that equipment redundancy can help with, but there are also situations in which equipment redundancy provides a false sence of security, and may in fact just add complexity and failure points rather than safety.
Disclaimer: The vast majority of my dives are "buddy" dives. However, I have been diving solo since 1976. I'd say about 1 out of every 7 or 8 dives I make are solo dives. That would total about 100-150 solo dives. So I'm far from an expert on solo diving, or on anything to do with diving really
What works for me is diving on calm days at sites I know very well, letting someone know where I'm going, checking in by cellphone before and after the dive. I stay shallow (normally <40 feet) and close to the entrance/exit point on shore. I use the same equipment I do for buddy dives. The atmosphere is my redundant air supply.
Best wishes.