Want a “Challenging” and “Rewarding” Course? This is the best way to describe the SSI rescue diver course. You will be building upon what you’ve already learned. This course expands on what you already know about how to prevent problems, and how to manage them if they occur. The fun part about this course is rising to challenges and mastering them. Most divers find this course both demanding and rewarding, and at the end, say it’s the best course they’ve ever taken.