HMS Mariner (J380) was an Algerine-class minesweeper of the Royal Navy. She was built by the Port Arthur Shipbuilding Company (Port Arthur, Ontario, Canada), launched on 9 May 1944 and commissioned on 23 May 1944. In 1954 Mariner was on patrol in the north sea as a fishery protection vessel,checking trawlers nets, and giving aid to any of the trawlers should they need it. She was sold to the Burmese Navy on 18 April 1958 and renamed Yan Myo Aung serving until 1982.