LowDrag
Contributor
A good reason to have the cert card is in case you go somewhere and damage your DS or thought you weren't going to dive but decided to and need to rent one. My understanding is that shops won't rent a diver a DS without proof of having taken a cert class. What I learned in my DS cert class I could have easily learned from a mentor but then I wouldn't be able to rent a suit if I needed to. So having the card for me is okay, plus I got mine for $25, because it was a package deal that I worked out with my LDS before actually getting the DS I have now. I had planned on renting one for a while but came up with the cash for suits for both my wife and me at the last minute.