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NavSource Online: Mine Warfare Vessel Photo Archive

HM BYMS-2023
ex-HM J-823

BYMS-23 served the Navies of Great Britain and Italy

BYMS-1 Class Motor Minesweeper:

  • Laid down 4 March 1942 as BYMS-23 by the Seattle Shipbuilding and Drydock Co., Seattle, WA
  • Launched 23 May 1942
  • Completed, transferred to Great Britain 27 October 1942 and reclassified J-823
  • Reclassified BYMS-2023
  • Rescued survivors of the U.S. freighter John Bell torpeoded by the German submarine U-410, 26 August 1943
  • Returned to U.S. custody 23 May 1947; transferred to the State Department, Foreign Liquidation Commission; sold to Italy and named Mughetto (DR 413) and struck from the Naval Register
  • Reclassified M-5409
  • Struck from the Italian registry in 1966
  • 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 charge tracks
  • Propulsion: Two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts.
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    No image of BYMS-23 is available at this time

    There is no DANFS history available for BYMS-23
    Additional Resources and Web Sites of Interest
    Naval Minewarfare Association
    Association of Minemen
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    This page created and maintained by Joseph M. Radigan
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