For PADI Open Water Diver course referral students who want a refresher prior to making their open water training dives. 오픈 워터 다이버로 업그레이드하려는 PADI 스쿠버 다이버들을 위한 코스입니다. A review of important knowledge and skills for the Junior Open Water Diver seeking to upgrade to Open Water Diver.