Of course I do. Shut up already and take my money!

Jokes aside, going closed is a big decision, with ramifications that are not obvious at the time the decision is made. As a result, quite a few folks who take the training and maybe even buy a unit end up reverting to open circuit, thousands of [insert currency unit] in the hole.

To avoid such frustration, it is worth doing some research into the actual prerequisites, beyond mere agency standards, for making the transition to closed circuit a rewarding endeavor.

For this article in Alert Diver, I interviewed six renowned and prolific instructors to learn what it takes to become – and remain – a CCR diver.