The Advanced Open Water Diver course is all about advancing your skills. You'll practice navigation and buoyancy, try deep diving and make three specialty dives of your choosing. For every specialty dive you complete, you can earn credit towards your specialty certifications. Here are a few of the many options: Deep, Dive Against Debris, Enriched Air Nitrox, Fish Identification, Night, Peak Performance Buoyancy, Search & Recovery, Underwater Naturalist, Underwater Navigation, and Wreck Diver.