RFA Empire Gull (L3513) was a landing ship, tank of the Royal Fleet Auxiliary. She was familiarly known as the "Black Pig" and was one of the last serving British LSTs. She was built as LST 3523, one of the Empire Ships, and later commissioned as HMS Trouncer. During the Suez Crisis she was pressed into Government service as SS Empire Gull. In 1970 she was transferred to the Royal Fleet Auxiliary as RFA Empire Gull, serving for ten years before being scrapped.