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NavSource Online: Mine Warfare Vessel Photo Archive


Call sign:
Nan - Able - Roger - Easy

YMS-1 Class Auxiliary Motor Minesweeper:

  • Laid down 21 April 1941 by the Rice Brothers Corp., East Boothbay, ME
  • Launched 14 March 1942
  • Sponsored by Mrs. Doris Rice
  • Completed 1 July 1942 and commissioned USS YMS-12
  • Struck from the Naval Register 17 April 1946
  • Transferred to the War Shipping Administration in June 1947
  • Registered in 1948 to Godfrey's Inc. of Brownsville, TX as the freighter Oro Toro
  • Fate unknown.


  • Displacement 270 t.
    1948 - 267 t.
  • Length 136'
    1948 - 125.2'
  • Beam 24' 6"
    1948 - 24.8'
  • Draft 8'
    1948 - 11.6'
  • Speed 15 kts.
  • Complement 32
    1948 - Six
  • Armament: One 3"/50 dual purpose gun mount, two 20mm mounts, and two depth charge projectors
  • Propulsion: Two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    YMS-12 20k Rice Brothers Corporation (East Boothbay, Maine) was founded by his grandfather Henry W. Rice and his brothers William and Frank in 1892. Henry bought out his brothers and ran the yard with his sons, Donald, Baxter (Roberts father) and Carl until 1956. The yard was sold several times afterward and was bought by Washburn & Doughty in 1988. The picture shows the yard from the water front in 1942, the PC-504 (later SC-504) on the left is ready for launching, the PC-503 (later SC-503) is fitting out and the YMS-12 is dockside fitting out
    YMS-12 83k 29 May 1942 Robert Hurst

    There is no DANFS history available for YMS-12
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