I should have deep, wreck, drift, nitrox, peak performance buoyancy, boat, naturalist, night, dan o2 and some other non-diving specialties such as AWARE. As an OWSI, I will be able to teach all regular courses from OW through Divemaster but have to apply showing instruction and/or experience requirements have been met for specialty instructor. I can then teach the specialty and once I get 25 certs, I can apply for the MSDT rating.