Join the SSI Science of Diving specialty and you will develop a complete understanding of the underwater world and its effects on the human body. This specialty is mandatory training for most SSI Professional programs, as well as for some Extended Range programs, and is an important way to expand your diving knowledge. Online, you can take your SSI Science of Diving specialty certification from the comfort of your home and get ready to begin your career as a diver. When you're done, you'll be halfway to earning the coveted SSI Divemaster credential and obtaining the SSI Science of Diving specialty certification.