PADI OWSD (Step 3): Open Water Training | Open Water Scuba Diver CertificationOpen Water Training is Step 3 of earning your PADI Open Water Scuba Diver Certification. This class takes place with your instructor in an open water environment using scuba gear. (The ocean, a lake, or quarry.) PADI open water training is the last required step in obtaining your PADI Open Water Scuba Diver certification. STEP 1: E Learning STEP 2: Confined Water (CW) Training Are both required to be completed prior to this course