Jase, PADI (Professional Association of Dive Instructors) is a for profit organization of instruction/certification that's openwater course, from what I hear, requires no rescue technique training, just basic equipment, buoyancy, and underwater management skills. I've read the PADI openwater book, and its very basic. NAUI (National Association of Underwater Instructors) is a non-for-profit organization whose initial openwater certification course requires a substantial swim test, breathold test, and water tread test. They teach everything PADI does along with navigation, basic rescue technique, etc. at about the same price. I'd go with NAUI anyday.