Originally Posted by
charliegolf
Don't (not saying you are btw) underestimate the disorientating effect of being upside down in the water either. As a very very confident 'water-person', I was amazed at the effect of this when I used the Navy's 'dunker' tank- strapped in with a psp on my back. It's an eye opener.
CG
I was dunker trained in the RN and was also a Sqn SURVO so I have quite some experience.