The Navy Diver's job isn't an easy one. They work in the most extreme conditions, performing various underwater tasks ranging from underwater ship repair, underwater salvage and special operations/special warfare type diving. Because their area of operations are so varied, they can be required to utilize any type of diving equipment for use in any depth or temperature in any part of the world. Basically, they're badasses.
One diver tried explaining the ethos of a diver to me. He said, "We come in all shapes and sizes, we're always around when you need us, on land, at home, or in the water. We spend our lives drifting somewhere between childhood and adults."