USS Lyon (AP-71) was a type C3 ship of the United States Navy which played an extensive role in naval transportation during World War II. The Lyon was built as Mormactide under a Maritime Commission (MC) contract by the Ingalls Shipbuilding Company of Pascagoula, Mississippi. She was laid down 21 August 1939, and was launched on 12 October 1940; sponsored by Gloria McGehee.
Mormactide was the third ship to be built by Ingalls for Moore-McCormack Lines and was designed specifically for the South American trade. The ship was completed in April 1941 and turned over to the War Shipping Administration (WSA) for wartime operation in March 1942 when it was operated by Moore-McCormack for the WSA under a United States Army Transportation Corps agreement. In August the ship was transferred to the Custody of the War Department. On 20 August 1942 the ship was acquired by the Navy and was renamed the Lyon after Mary Lyon, the founder of Mount Holyoke College (then Mount Holyoke Female Seminary). (See also List of U.S. military vessels named after women.)
The Lyon was transferred for conversion to the Atlantic Basin Iron Works of Brooklyn, New York on 13 September 1942. The ship was commissioned on 16 September 1942. After the ship's service in World War II, the ship was decommissioned on 3 May 1946, and was returned to her owners, Moore-McCormack Lines. In 1966 the ship was acquired by Grace Lines and renamed the Santa Regina.
Pre-World War II
Mormactide was the second ship designed for Moore-McCormack's South American trade equipped with a cargo air conditioning system and the third ship to be built by Ingalls for the line. The ship, a MC type C3 hull numbered 65, Ingalls hull 255 was assigned official number 240348 and completed on 10 April 1941. Mormactide was turned over to the War Shipping Administration (WSA) for wartime operation on 10 March 1942. Mormactide was operated by Moore-McCormack for WSA under a standard Army Transportation Corps agreement until 8 August 1942 when the ship was transferred to the Custody of the War Department. On 13 September 1942 the Navy acquired Mormactide under a bareboat charter from WSA.
While ships of the western task force of Operation Torch silenced French shore batteries and naval resistance, troops of the western pincer were landed to trap the retreating Afrika Korps of General Erwin Rommel, the "Desert Fox". Though a cease-fire was negotiated on 11 November, German U-boats interfered, and torpedo attacks began 10 November. Since the 15 transports and cargo ships anchored in Fedhala Roads offered a target, they were removed to the security of Casablanca. The Lyon was part of a convoy that sailed for the United States on 15 November, and arrived back in Norfolk on 24 November.