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HMAS Otama was an Oberon-class submarine, formerly of the Royal Australian Navy (RAN). Built in Scotland, the submarine was the last of the class to enter service when commissioned into the RAN in 1978. Otama was a specialist, one of two "mystery boats", fitted with additional surveillance and intelligence-gathering equipment. Otama was routinely deployed on classified operations to obtain intelligence on Soviet Pacific Fleet vessels and Chinese Navy vessels, and conducted associated coastal surveillance, throughout Asia.
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