to reduce diver impact on the environment. Recreational sidemount diving - background, history, benefits and equipment of sidemount diving and how to configure the equipment and manage it in the water. River diving - peculiarities of diving in rivers, identifying and assessing hazards an how to manage river diving equipment. Science of diving - physics, physiology, decompression theory, marine life and diving equipment. Search and recovery - various search patterns using ropes and compasses, planning of search and recovery operations in a team, and the correct handling of lifting bags. Shark ecology - biology, ecology and identification of sharks, and procedures for diving with sharks. Waves, tides and currents - basics concepts of waves, tides and currents, and suitable equipment and procedures for diving in them from the shore and from boats. Wreck diving - how to get information on wrecks, to locate them, to prepare for a wreck dive, use appropriate wreck diving techniques, and identify and avoid hazards while diving on wrecks. Freediving programs Try Freediving Basic Freediving Freediving Level 1 & Pool Freediving Level 2 Freediving Level 3 Freediving Specialty Programs such as: No-Fins Freediving Monofin Freediving Free Immersion Training Tables Professional diving certifications The SSI Training Standards outline the professional qualifications and progression. Dive Guide (Dive leader, ISO 24801-3): prerequisites are certification for the specialities of Navigation, Deep Diving, and Night & Limited Visibility, plus Diver Stress & Rescue and 40 logged dives totaling at least 25 hours. To qualify, requires training, exams, and logging at least 50 open water dives totaling 32 hours. Divemaster: awarded to certified Dive Guides completing the Science of Diving speciality and logging 60 open water dives totaling at least 40 hours. Snorkel Instructor (ISO 13970) Assistant Instructor (Level 1 instructor, ISO 24802-1): prerequisite Divemaster. Open Water Instructor (Level 2 instructor, ISO 24802-2): prerequisite Divemaster. The qualified instructor can teach courses up to the level of Dive Guide. Advanced Open Water Instructor (AOWI = OWI + 4 Specialty Instructor ratings {including Diver Stress and Rescue} + issued 15 certifications at a level higher than Open Water Diver) Divemaster Instructor (DMI = AOWI + Science of Diving Instructor + issued 30 certifications in different programs) Assistant Instructor Trainer (AIT) Master Instructor (MI = AIT + 250 dives + issued 150 certifications in different levels) Instructor Trainer Instructor Certifier Advanced diving certifications Extended Range certifications XR Nitrox Diver XR Advanced Wreck Diver XR