some additional training). Basic Diver (ISO 11121) Referral Diver Indoor Diver Scuba Diver (ISO 24801-1) (including Junior Scuba Diver for under 15s) The Open Water Diver complies with Autonomous diver, ISO 24801-2. The Autonomous diver level is variously described as the best, and most popular, introductory scuba qualification. Progression beyond Open Water After Open Water certification, progression mainly depends on completing Scuba Specialty Programs and logging certain numbers of dives. Advance Adventurer: a program of five adventure dives and an introduction to the theory of 12 specialties. Considered equivalent to PADI's Advanced Open Water certificate. Specialty Diver: automatically awarded upon completion of 12 logged dives and two specialty programs. Advanced Open Water Diver: automatically awarded upon completion of 24 logged dives and four specialty programs. Diver Stress & Rescue: special training to recognize and handle with stress, prevent accidents and act correctly in an emergency. Considered equivalent to PADI's Rescue Diver program. Master Diver: the highest recreational rating, automatically awarded after completing four specialties, Diver Stress and Rescue, and 50 logged dives. Scuba specialty programs Below are some of the speciality courses that can be completed as part of the above certifications. Altitude diver - planning, procedures and equipment for diving at altitudes above with reference to the modified decompression procedures required. Boat diving - boat diving techniques, choosing a travel agency and diving operator and what equipment to take when travelling. Deep diving - planning and conducting recreational dives below Underwater photography - introduction to underwater photography, using a digital camera system, composition and editing of underwater photos Diver stress and rescue - how to avoid, recognize and deal with problems on the surface and underwater. Dry suit diving - advantages of dry suit diving, types of suits, valves, underwear and accessories, dry suit diving techniques and suit maintenance EAN Nitrox - planning dives with Nitrox and using Nitrox safely, including analyzing the mix before use. Equipment techniques - choice of diving equipment to suit needs, and how to fit, adjust, maintain and make minor repairs to equipment. Navigation - using a compass and using environmental clues, how to estimate distances, navigate search patterns, find waypoints, and return to the exit point. Night and limited visibility - comparison of night and limited visibility diving, preparing for the dive, and the appropriate equipment and procedures. Perfect buoyancy - understanding the principles of buoyancy control and applying them in the water