novadiver:when I learned to dive (circa 1978) we didn't use BCDs at all. just a plate and a tank. and I still find myself with zero air in the wing at the end of the dive anyway, so does this mean that the BCD is a crutch ( for a lack of a better word) for divers that lack proper training to begin with. HMMMMM makes me think?
I don't think a bc is a crutch. If you dive where it's warm and you can dive in swim trunks with a small tank you shouldn't need a bc. On the other hand if you need a suit that will compress at depth or you need to carry much gas you will need one.
some of (if not the first) divers to use them were cave divers that needed a way to stay off the bottom when they weren't swimming. If they stopped kicking they sunk, silted, got lost and died. They started with things like plastic jugs on the end of a string that they could put air into or dump air from. The need was not due to a lack of skill.
While it's kind of neat to watch the old Custau (sp?) shows and see them light on the bottom any time they stop, I sure am glad we don't have to dive that way any more.
to this day few divers are taught to use a bc correctly in early training. I don't think we're talking about the " lost art of diving" as some have called it. It's more like bc's and using them (buoyancy control and trim) just haven't yet been fully integrated into training yet. Divers are taught while kneeling on the bottom still like they had to before the invention of the bc. Buoyancy control is stuck in the class like an afterthought rather than the central theme that it is.
Do a dive in a way that you on kick if you want to move and don't intend to touch or disturb the bottom ever and it becomes hard to call a bc a crutch.