Please report any broken links or trouble you might come across to the Webmaster. Please take a moment to let us know so that we can correct any problems and make your visit as enjoyable and as informative as possible.

NavSource Online: Mine Warfare Vessel Photo Archive

ex-HMS J-1021

YMS-221 served the Navies of Great Britain and Greece.

YMS-1 Class Auxiliary Motor Minesweeper:

  • Laid down 31 December 1942 as YMS-221 by J. N. Martinac Shipbuilding Co., Tacoma, WA
  • Launched 22 April 1943
  • Completed 16 September 1943, transferred to Great Britain and named HMS J-1021
  • Renamed HMS BYMS-2221
  • Struck from the Naval Register 28 August 1947
  • Transferred to the State Department, Foreign Liquidation Commission in January 1948
  • Returned to U.S. custody 12 February 1948, transferred to Greece and named Pigassos
  • Fate unknown.


  • 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 charg 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-221 119k c. June 1945
    Copenhagen, Denmark
    From the collection of Thomas Atherton Widnes
    Dan Atherton
    YMS-221 150k Crew members names from back of above photo
    From the collection of Thomas Atherton Widnes

    There is no DANFS History currently available for YMS-221
    Additional Resources and Web Sites of Interest
    Naval Minewarfare Association
    Association of Minemen
    Back To The Main Photo Index Back To the Mine Warfare Ship Photo Index Back to the Auxiliary Motor Minesweeper (YMS) Photo Index

    Comments, Suggestions, E-mail Webmaster

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