The Science of Diving Instructor Digital Kit is also needed if not already certified as a Science of Diving instructor. Divemaster Instructor (DMI) is the next instructor level after Advanced Open Water Instructor (AOWI). In addition to the duties performed by an active status Advanced Open Water Instructor, active status Divemaster Instructors may conduct the Divemaster Crossover program for candidates from other recognized scuba training agencies and/or enroll in a Dive Control Specialist Instructor program.