I have never solo dived (although I do plan to take a course in the future). In my mind though solo diving is easy until the SHTF moment. If you are a thinking diver and willing to put in the practise and pay for redundant gear, then solo without training might be a reasonable route. There is always the thing about learning from others mistakes though that courses tend to give you. You are right about the calculated risk but do you really know the extent of the risk without training?Question to those who advocate for taking a formal solo training:
I don't quite get what a formal solo training can teach that experience and advanced (or even open water?) class can't? Equipment failures are bad. Running out of air is bad. Don't we all know that? If something goes wrong we must address/replace that underwater - put a different 2nd stage in your mouth, replace/clear mask, etc. - didn't we practice that in the OWD class? When you dive solo, you have to be able to address those situations with resources that you yourself carry (including a pony) - isn't that obvious? If you are diving without some of those things (a pony, a spare mask, etc., etc.) you are taking a calculated risk, which is quite comparable to the risk of diving with a stranger for a "buddy".
What am I missing? Why would I invest time and money in more books and class time rather than go to a local pool and practice with my gear?
[PS. I'm sure these half-rhetorical questions have been asked countless times before, but same is true for many arguments made in this thread against "untrained" divers diving solo]
It is one thing talking about and practising switching masks, using a pony etc when not under stress but an entirely different matter using them while all alone.with no support. Can you perform a mask change without having your buoyancy all over the shop? Can you deploy a pony in an emergency solo without getting your gear tangled? What is the best set up for your gear (given you might choose to change a few things for going solo)?