The PADI Scuba Diver course is a subset of the PADI Open Water Diver course. If you’re short on time but really want to become a diver, the PADI Scuba Diver rating might be right for you ̶ particularly if you expect to go scuba diving primarily with a dive guide. This course is an intermediate step for earning an Open Water Diver certification, if that’s your ultimate goal.