HMS Ambrose was a cargo and passenger liner bought by the Admiralty from the Booth Steamship Company early in World War I and converted into an armed merchant cruiser. Later in the war she was converted into a submarine depot ship and spent most of the 1920s supporting submarines in the Far East. Upon her return home in 1928, Ambrose was placed in the Reserve Fleet. She was later modified to support destroyers and did so throughout World War II before she was sold for scrap in 1946.