So how many of those emergencies have you actually experienced? It's one thing to sit in the comfort of a classroom or in front of your keyboard and claim you'd know what to do if it happened. It's something else entirely when it occurs underwater ... particularly if there's something else going on that's already got you a bit stressed out.
Have you ever encountered a current that forced you down or away from your intended destination? Have you ever experienced a CO2 overload to the point where you felt like you just could not get enough air? Those two stressors often occur together ... how would you deal with it? Would you really know? Suppose you knew ... would you remember? Would you apply that knowledge in a timely way so as to break the chain of events that could otherwise just keep piling on stressors?
Suppose you had to deal with a freeflow while soloing? Ever experience a real freeflow? It ain't at all like in the pool ... things can get pretty confusing with all those bubbles blowing in your face ... probably knocking your mask skirt up and flooding your mask. What if it happened in a place where you don't have the option of landing on the bottom while you take care of those things? What if it blew the mask off your face and it sank down where you couldn't find it?
Before you get too confident in your ability to deal with those situations, perhaps it'd be a good idea to go out with a mentor and put yourself in the situation to see what it feels like ... and to try, without help, to extricate yourself.
If you can ... THEN you know. Before then, you're just thinking that you can. Problem is that most folks think they're more skilled than they really are.
Only by experiencing it can you really know for sure ...
... Bob (Grateful Diver)
A current while diving, no. I have experienced them while snorkeling, swimming, and surfing. I know how to deal with them in those situations, and as I understand it, the process is the same while diving. I have dealt with free flows underwater but nothing "major" that couldn't be fixed with a simple bang on the reg. Blown o-rings at depth, no. "Standard" OOA, we all practice, at least occasionally. I haven't allowed myself to be put in that situation and have been lucky enough not to dive with someone who has. I have no interest in being that complacent or diving with someone who is. I've had my mask and reg kicked off of me (at the same time) during my very first OW dive. No real issues... perhaps because I was so fresh from class... not something I've practiced since I will admit.
I've never dealt with a CO2 overload so I don't know how I would deal with that other than just trying not to panic. Is there a particular method to deal with it?
I agree, having partners and especially mentors is a much preferred situation and am seeking them out. I don't intend to solo any time soon, but I see it as an option for the future.
As I've said, I'm confident, perhaps too confident, but I believe understanding your own "general" response to emergencies and being truly honest with yourself about them is no different under water than any other "high stress" environment. I've been on a cliff with a cut rope, I've been in a kayak in "rough seas" with a broken paddle, I've been in "rip" currents and I've been involved with SAR for many years. I know how I handle stress both out of the water and in it. From this, and the few "stressful" situations I have dealt with in diving, I believe I can handle any non-medical emergency that might arise. I will gladly train with other people to know this for sure, but like you said, you don't truly know until you encounter a situation. I "know" how I handle stress and I extrapolate that...
I'm not trying to say I'm some sort of savant capable of solo-ing the 7 seas, but I am very comfortable choosing to dive solo in a pool and I suspect I will someday reach the point where I am comfortable diving in the "real world" solo. Until that time, I will happily forgo solo dives in favor of diving another day with a partner.
People can (and should) always question my confidence as a newb, especially those who don't know me. Being questioned at least forces us (or most of us) to pause and consider why we are meeting such resistance. Like I said in my original post on this thread, I think that's a good thing. That still doesn't change my opinion that solo is a reasonable choice for some people in some situations.