HMAS Albatross (later HMS Albatross) was a seaplane tender of the Royal Australian Navy (RAN), which was later transferred to the Royal Navy and used as a repair ship. Albatross was built by Cockatoo Island Dockyard during the mid-1920s and entered service at the start of 1929. The ship experienced problems with the aircraft assigned to her during her career: the amphibious aircraft she had been designed for were retired just before the ship entered service, the replacement aircraft could not be catapult-launched from the ship, and a new plane designed specifically to work with the ship began operations after Albatross was demoted from seagoing status in 1933.
After five years in reserve, Albatross was transferred to the Royal Navy to offset the Australian purchase of the light cruiser Hobart. Although the British had little use for a seaplane carrier, the ship found a niche after two aircraft carriers were sunk by the Germans early in World War II. Albatross was initially based in Freetown, Sierra Leone for patrol and convoy escort duties in the southern Atlantic, then was relocated to the Indian Ocean in mid-1942. From late 1943 to early 1944, the vessel underwent conversion into a "Landing Ship (Engineering)" to support the Normandy landings, and was used to repair landing craft and other support vessels off Sword and Juno Beaches. Albatross was torpedoed in October, but survived to be towed back to England and repaired. After repairs completed at the start of 1945, she served as a minesweeper depot ship, but was decommissioned after the war's end.