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NavSource Online: Mine Warfare Vessel Photo Archive


Call sign:
Nan - Charlie - Tare - Uncle


YMS-447 served the Navies of the United States and the Soviet Union

YMS-1 Class Auxiliary Motor Minesweeper:

  • Laid down 17 June 1943 by Robert Jacob, Inc., City Island, NY as Patrol Craft Sweeper, PCS-1394
  • Reclassified as an Auxiliary Motor Minesweeper, YMS-447, 27 September 1943
  • Launched 18 March 1944
  • Completed and commissioned USS YMS-447, 28 June 1944
  • Transferred to the Soviet Union 27 March 1945 and reclassified T-181
  • Assigned to the Baltic Fleet 28 June 1945
  • Placed out of service 30 December 1955
  • Reclassified as an experimental vessel OS-7, 27 December 1956 and transferred to the Northern Fleet
  • Scrapped 16 October 1957.


  • Displacement 270 t.
  • Length 136'
  • Beam 24' 6"
  • Draft 8'
  • Speed 15 kts.
  • Complement 32
  • 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-447 165k YMS-447
    Courtesy of the City Island Nautical Museum
    Tom Nye

    There is no DANFS History currently available for YMS-447
    Additional Resources and Websites of Interest
    Naval Minewarfare Association Association of Minemen

    Back To The Main Photo Index Back To the Patrol Craft/Gunboat/Submarine Chaser Ship Type Index Back To The Patrol Craft Sweeper (PCS) Photo Index Back To the Mine Warfare Ship Photo Index Back To The Auxiliary Motor Minesweeper (YMS) Photo Index

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