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R/V Melville was built in 1969 and was owned by the Office of Naval Research and operated by Scripps Oceanography as part of the University-National Oceanographic Laboratory System (UNOLS). Configured as a general-purpose oceanographic research vessel, Melville supported a wide range of scientific activities across every discipline of oceanography. Melville excelled at projecting observational capabilities to the far corners of the planet and she sailed more than 1.5 million miles from the Arctic Circle to the Southern Ocean, crossed the equator more than 90 times, mapped the deepest spot on the planet, recovered core and dredge samples from trenches greater than 8,000 meters deep, and made first-ever observations of deep ocean volcanic eruptions. Much of what we know today about plate tectonics, marine biodiversity, ocean circulation, waves, climate and the multitude of ways the ocean impacts human society, has benefited from research conducted aboard Melville. Melville served much longer than the design expectation of a 30-year life, having undergone a service life extension in 1992 that extended the useful life of this ship to 46 years, and resulted in a more capable and efficient vessel. In 2014 Melville reached the end of this extended period, and was retired from UNOLS service in September 2014.