Other than taking a lot less time, diver training has not changed significantly in the nearly four decades that I’ve been doing it. And, as a consequence, beginning divers are not much better today than they were in the 1970s. In many respects, they’re worse.
Most dive instructors (and their training agencies) will tell you it’s unrealistic to expect beginning divers to master much in the way of buoyancy control. That, in order to achieve even a modest degree of control over buoyancy, students really need to enroll in a Buoyancy Control Specialty Diver course immediately upon certification. We’re here to tell you that’s bullshit.