Register for courses All / Courses Open Water Diver | Advanced Open Water | Nitrox Diver | Dry Suit Diver | Diving First Aid (DFA Pro) | All Courses Open Water Diver Advanced Open Water Nitrox Diver Dry Suit Diver Diving First Aid (DFA Pro) Discover Dive Pool Parties Merch NAUI Open Water Diver Course · Chicago, IL · September/October 2025 $550.00 Register! Rescue Diver Course · September 27 & 28, 2025 $300.00 Register!