I don't know what Ed's dedicated buoyancy class entails, but there is a lot of work on buoyancy within the fundamentals class.
Tom
PS, I don't notice too much difference diving a singles rig with/without a crotch strap. I've never dove my doubles without one. I'm not sure how I'd feel backrolling in doubles without one...
Tom
PS, I don't notice too much difference diving a singles rig with/without a crotch strap. I've never dove my doubles without one. I'm not sure how I'd feel backrolling in doubles without one...