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NavSource Online: Service Ship Photo Archive

USNS Mission San Luis Obispo (T-AO-127)
Mission San Luis Obispo (AO-127) (1947 - 1949)

International Radio Call Sign:
November - Hotel - Papa - Whiskey
Awards, Citations and Campaign Ribbons

Precedence of awards is from left to right
National Defense Service Medal

Mission Buenaventura Class Fleet Oiler:
  • Laid down, 18 April 1944, as a Maritime Commission type (T2-SE-A2) tanker hull, under Maritime Commission contract (MC 1823) at Marinship, Sausalito, CA.
  • Launched, 18 June 1944
  • Delivered to the WSA, 15 July 1944, for charter to Pacific Tankers, Inc.
  • Returned to the Maritime Commission, 27 March 1946, for lay up in the National Defense Reserve Fleet, James River, Fort Eustis, VA.
  • Acquired by the Navy, 24 October 1947, and assigned to the Naval Transportation Service (NTS) as Mission San Luis Obispo (AO-127)
  • Absorbed into the Military Sea Transportation Service (MSTS), 1 October 1949 and placed in service as USNS Mission San Luis Obispo (T-AO-127)
  • Placed out of service, 22 June 1955
  • Laid up in the National Defense Reserve Fleet, Olympia, WA.
  • Reacquired by the Navy, 27 June 1956, and again placed in service with MSTS as USNS Mission San Luis Obispo (T-AO-127)
  • Returned to the Maritime Administration, 24 June 1957, for lay up in the National Defense Reserve Fleet, Beaumont, TX.
  • Struck from the Naval Register, 24 September 1957
  • Sold, 25 March 1966, to Hudson Waterways Corp., for conversion to a combination containership and train ferry, renamed SS Seatrain Puerto Rico, 1 April 1966
  • Final Disposition, scrapped, date unknown
    Displacement 5,532 t(lt) 21,880 t.(fl)
    Length 524'
    Beam 68'
    Draft 30' (max)
    Speed 16.5 kts.
    Complement 52 civilian mariners
    Armament none
    Propulsion Turbo-electric, single screw, 6000hp

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    Size Image Description Contributed
    Mission San Luis Obispo (AO-127)
    Mission San Luis Obispo 33k Mission San Luis Obispo (AO-127) moored pierside, circa 1947-49, location unknown. Matthew D. Herrera
    USNS Mission San Luis Obispo (T-AO-127)
    Mission San Luis Obispo 1041k USNS Mission San Luis Obispo (T-AO-127) underway in San Pedro harbor, date unknown. David Buell
    Commercial Service
    Mission San Luis Obispo 75k Ex USNS Mission San Luis Obispo (T-AO-127) in merchant service as SS Seatrain Puerto Rico underway, date and place unknown. .

    View the USNS Mission San Luis Obispo (T-AO-127)
    Dictionary of American Naval Fighting Ships (DANFS)
    Crew Contact And Reunion Information
    Fleet Tankers Association
    U.S. Navy Memorial Foundation - Navy Log

    Additional Resources and Web Sites of Interest

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    This page is created and maintained by Gary P. Priolo
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    Last Updated 10 October 2008