Are you looking for something extraordinary? To do something others can only dream of? To help people transform their lives? To open doors you didn’t even know existed? All of this, and more, awaits you as a PADI Open Water Scuba Instructor.The Open Water Scuba Instructor (OWSI) program is one of two distinct components of PADI’s Instructor Development Course (IDC) – the core of PADI Instructor training. The first portion is the Assistant Instructor course followed by the Open Water Scuba Instructor program.