A merchant name retained. A Franciscan mission in California founded in 1770.
Mission San Carlos was laid down on 1 November 1943 under a Maritime Commission contract by Marine Ship Corp., Sausalito, Calif.; launched 12 February 1944; sponsored by Mrs. J. H. Pomeroy; and delivered 15 April 1944.
Chartered to Pacific Tankers Inc., for operations on 15 April, she spent the remainder of the war providing our forces overseas with the vital fuel needed to keep our victorious armies on the move. She was returned to the Maritime Commission on 20 April 1946 and laid up in the Maritime Reserve Fleet at Mobile, Ala.
Acquired by the Navy on 12 November 1947 and chartered to Marine Transport Inc., for operations, she was placed in service with the Naval Transportation Service as Mission San Carlos (AO‑120). After 1 October 1949, she was under the operational control of the newly created Military Sea Transportation Service as USNS Mission San Carlos (T‑AO‑120). She remained in service with MSTS until 6 November 1957, when she was transferred to the Maritime Administration for layup in the Maritime Reserve Fleet at Beaumont, Tex. She was struck from the U.S. Naval Vessel Register on the same date.
Sold to Transwestern Associates on 16 May 1966 for conversion to a bulk carrier, she was reacquired by MARAD in the summer of 1966 and resold to Hudson Waterways Corp. for conversion into a combination train ferry and containership, in September 1966. Renamed Seatrain Maryland, into 1969 she carries cargo between the east and west coasts of the United States and occasionally to Vietnam.
