Scuba Instructor Training Courses Divers of all levels can enroll in a variety of courses in Nha Trang, Vietnam, a popular scuba diving destination. The Open Water Diver Course is the first step in the certification process for diving instructors. This three-day training is provided by Diving Vietnam Divers and focuses on imparting real-world knowledge and application of scuba diving techniques, with a particular emphasis on neutral buoyancy. Divers can go to advanced, Rescue Diver, Divemaster, and Assistant Instructor courses after completing the Open Water Diver Course. These courses enhance instructors’ skills and get divers prepared for the Instructor Assessment Course. Divers must have completed a minimum 100 dives and have held their certification for at least six months in order to advance to the instructor level.