What is the “Scuba Discovery” class? Well, let’s say you’re on vacation. You’ve always wanted to go scuba diving, but you’re not sure it’s something you want to invest the time or the money for a full certification course. You want to “try before you buy”. So you sign up for the Scuba Discovery (also known as Discover Scuba Diving, Try Scuba Diving, Tandem Diving, etc.) class.