[turtlediver1]

I am planning a database of divers and want to know if I will have to check that everyone is renewed at the same time each year or if I will have to keep check of individual card expiry dates.

Please tell me when you need to renew your certification and which certification agency you belong to (e.g. PADI, SSI, BSAC). I believe that all PADI divers must renew at the beginning of each calander year but have no idea about other agencies.