A master scuba diver c-card

A master scuba certification is a handy c-card to carry, it implies you have at least attended an Advanced Open Water course, so you can dive to 30 metres and are not limited to an 18 metre depth. It also indicates you have attended a Rescue Diver course so you have maybe half a chance of some self-rescue abilities.

The c-card also states you have undertaken five specialty courses and hold at least 50 dives experience, it doesn't notify the dive facilities of while specialties, just that you have undertaken some extra instruction.

This is my c-card of choice when diving at unfamiliar facilities as you tend to be treated as less of a fool and left to your own devices. I believe fronting up with an instructor certification is wanky; the dive staff can work out pretty quickly if you are on your game - I never saw the purpose of big noting yourself.

The fact of the matter is, you are only an instructor when instructing - that is, when being paid to dive. If you are paying to dive, then you are a customer. The Master Scuba Diver c-card is my card of choice even though I can inform the dive resort of my full name and date of birth because even in 2015, connection to the internet is marginal at best and a physical c-card is still best.