Becoming an SSI Specialty Instructor is easy. Continue your diver training as an instructor by enrolling in a Specialty Instructor seminar for each of the diving specialties you wish to teach. You can also co-teach the specialty you're interested in with an experienced Specialty Instructor, or request verification of your experience and send it directly to SSI.
The specialties taught at Nautilus are numerous: Deep, Nitrox, Night, Decompression, DPV, Navigation, (Advanced) Wreck, Boat Diving, Computer, Independent, Photo & Video, Sidemount, Science of Diving, Search&Recovery... as well as all ecological specialties. Teach more specialties to automatically qualify as an Advanced Open Water Instructor.