HMS Challenger was a survey ship of the United Kingdom's Royal Navy. She was laid down in 1930 at Chatham Dockyard and built in a dry dock. Afterwards she was moved to Portsmouth for completion and commissioned on 15 March 1932. Service history Until the outbreak of the Second World War, Challenger surveyed the waters around the United Kingdom, Labrador, the West Indies, and the East Indies. On 23 September 1932, she struck a rock north of Ford's Harbour, Labrador, in the Dominion of Newfoundland () and was beached. She was later refloated. From 1939 to 1942 she served in home waters and as a convoy escort. In June and July 1941 she and three s escorted the troop ship from Britain en route for Freetown, Sierra Leone. When the troop ship was torpedoed north of the Azores, Challenger and the corvette HMS Starwort rescued hundreds of survivors and then transferred them to the armed merchant cruiser HMS Cathay. From 1942 to 1946 Challenger surveyed in the Indian Ocean and the Western Pacific. She returned to Chatham in 1946 for a refit before returning to the Persian Gulf in late 1946. She left the Gulf in 1947 and went to Cyprus where a shore party logged tides. She then proceeded to Gibraltar for another refit in dry dock. In December 1947 men from Challenger and from the two destroyers and were landed in Aden in an attempt to restore order following anti-Jewish rioting. She circumnavigated the world from 1950 to 1953, surveying in the West Indies and the Far East, under Senior Scientist Dr. Thomas F. Gaskell. 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 was named Challenger Deep, a nearby survey having been conducted in 1875 during an expedition by a previous . In January 1954, Challenger returned to Britain, was paid off, and was broken up at Dover. References Sources Survey vessels of the Royal Navy 1931 ships Ships built in Chatham Maritime incidents in 1932