The ultimate recreational diver rating. All PADI Instructors with at least 25 PADI Divers and have earned five or more PADI Specialty Instructor certifications can be a Master Scuba Diver Trainer. Description The PADI Master Scuba Diver Trainer rating sets you apart as a dive instructor who takes continuing education seriously and is committed to teaching a variety of courses. (Potential employers like this.) Being an MSDT signifies that you’ve got the experience and certifications to offer all the training a diver needs to become a Master Scuba Diver – the ultimate recreational diver rating. All PADI Instructors who have certified at least 25 PADI Divers and have earned at least five PADI Specialty Instructor certifications can be Master Scuba Diver Trainers. This rating is the next step up the professional ladder and is a prerequisite for IDC Staff Instructor as well as for many TecRec Instructor ratings. Not there yet? Ask your PADI Course Director about a Master Scuba Diver Trainer prep course. Advertisement More Courses Divemaster Professional Assistant Instructor Professional Open Water Scuba Instructor Professional Specialty Instructor Professional IDC Staff Instructor Professional Master Scuba Instructor Professional