The Handicapped Scuba Association (HSA) was founded in 1981 and is now the world's leading authority on recreational diving for people with disabilities. Headquartered in California, HSA extends its underwater educational programs worldwide. HSA operates as an independent diver training and certifying agency. Its diver education programs and instructor training courses are internationally recognized and unequaled by any other programs in the industry. These programs were developed in conjunction with two major certifying agencies, the Professional Association of Diving Instructors (PADI) and the National Association of Underwater Instructors (NAUI). For more information, contact HSA.