PADI Divemaster (DM) PADI Assistant Instructor (AI) PADI Open Water Scuba Instructor Program (OWSI) PADI Instructor Development Course (IDC) PADI EFR Instructor PADI Instructor Specialties PADI Master Scuba Diver Trainer (MSDT) PADI IDC Staff PADI Master Instructor PADI Public Safety Resort Training Course