SSI Dive Control Specialist is SSI's initial dive leadership level and is considered by many as the "fun" leadership rating. That's because you can do more than any other entry-level dive leader. You can do more because you receive both dive master and assistant instructor training in the SSI Dive Control Specialist course. With other agencies, these courses are separate. You will study advanced physics, physiology and decompression theory. You'll practice advanced rescue techniques, fine-tune your diving skills and learn the basics of teaching.