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Marathon Swimming Australia (MSA) is the national authority for marathon and long-distance swimming in Australia, operating since 1973. It certifies swims, provides mentorship and resources to swimmers, preserves the history of open-water swimming, and advocates for safety, integrity, and environmental stewardship. It maintains the Australian Long Swims Database and oversees programs such as the Australian Triple Crown, rules and ratification, hall of fame, events, and support services.
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