 She circumnavigated the World from 1950 to 1953 that included surveying in the West Indies and the Far East.It was on this mission, in 1951 that "Challenger" surveyed the Mariana Trench near Guam, including the deepest known point in the oceans, deep at its maximum, near .This point had been named Challenger Deep after it was first surveyed in 1875 during an expedition by a previous .