When i was diving in indonesia, there were so many international divers from different countries. Lots of them have different dive certification from their own country's dive organization. I believe japan and Korea have their own.
Now, what happens if a diver who received a legit dive certifcations but it is not recognize worldwide cause it may not be PADI,SSI, Naui,etc? Would the dive centre here in NZ (who are strict with certification) wouldn't allow them to join their dive trips just because they don't have an international dive certificate?
interesting to know.