Take your first diving lessons, the Open Water Course. Your first diving certification: SSI International certification. If you have always dreamt of learning to dive, discover new sensations or just want to explore the diversity of the ocean floors, the Open Water course is your starting point towards underwater adventure. This certification is the most popular dive course in the world. It has allowed millions of people to discover the magnificent ocean floors and to be apart of the diving community and the lifestyle that comes with it.