Buddy of mine got his U.S. Navy Diver certification "subscuba" about 8 years ago (he's since out of the Navy). It was the navy salvage diver course, got the bubble for his uniform, listed on DD214, etc. He still has the photo cert card. Can he dive with this, or will dive operations make him show a Padi or Naui card? From the sounds of the training, it was, well, a little more than what I went through in Padi, so wondering if it's a valid c card as far as dive operations are concerned or if there's a way to pay money to get a c card from somewhere on a reciprocal basis without having to pay for a course (assuming the course was sufficient...I know nothing about it)?