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NavSource Online: Mine Warfare Vessel Photo Archive


Call sign:
Nan - Queen - Zebra - William


Destroyed 24 October 1945

YMS-1 Class Auxiliary Motor Minesweeper:

  • Laid down 2 September 1943 as PCS-1454 by the Tacoma Boat Building Co., Tacoma, WA
  • Reclassified as a Auxiliary Motor Minesweeper, YMS-478, 27 September 1943
  • Launched 8 January 1944
  • Completed 21 August 1944
  • Capsized during Typhoon Ida and grounded at Wakanoura, Japan 18 September 1945
  • Hulk destroyed 24 October 1945
  • Struck from the Naval Register 20 March 1946.


  • Displacement 270 t.
  • Length 136'
  • Beam 24' 6"
  • Draft 8'
  • Speed 13 kts.
  • Complement 50
  • Armament: One 3"/50 dual purpose gun mount, two 20mm mounts and one depth charge projector
  • 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-478 98k 8 October 1945
    Wakanoura, Japan

    Commanding Officers
    01LT R. D. Tuohy, USNR1945
    Courtesy Joe Radigan

    There is no DANFS history available for YMS-478
    Additional Resources and Websites of Interest
    Naval Minewarfare Association Association of Minemen

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    This page created by Gary P. Priolo and maintained by Joseph M. Radigan
    All pages copyright NavSource Naval History