Become a certified Assistant Instructor with SSI The Assistant Instructor rating is the next step after becoming a Divemaster along the scuba instructor pathway. It allows you to collect valuable teaching experience, practice briefings, teach academics, and conduct in-water training.If you want to further your career as a dive professional, you can finish the Instructor Training Course, pass the Instructor Evaluation, and become an Open Water Diving Instructor. Facts and Training Standards Amount of Academic Sessions 6 Amount of Pool/Confined Water Sessions 6 Amount of Open Water Sessions 7 Maximum Training Depth 40 m / 130 ft Suggested duration (h) 35 - 42 Certification Prerequisites Divemaster certification, Minimum 60 logged dives (totaling 40 hours dive time)