F. Mason wrote


If you are thrashed about in a stopper and cannot swim out, in theory your
buoyancy can contribute to keeping you IN the stopper I believe.

Its fairly sound theory - the recirculating water is at the surface, the
flow through is in the deeper water ..... And that's what you need to dive
into to get out of the stopper. I'd try diving with my BA on first
'though cos if the flow is as strong as a stopper you (almost) can't get out
of implies you'll need you BA once you do get out of it. But I guess if you
were going to drown if you didn't.....

Nidge