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NavSource Online: Mine Warfare Vessel Photo Archive

ex-HMS J-831

BYMS-2031 was built for Great Britain

BYMS-1 Class Motor Minesweeper:

  • Laid down 11 May 1942 as BYMS-31 by American Car and Foundry Co., Wilmington, DE
  • Launched 7 September 1942
  • Completed 12 March 1943
  • Transferred to Great Britain reclassified HMS J-831, 13 March 1943
  • Reclassified HMS BYMS-2031
  • Struck from the Naval Register 10 June 1947 and transferred to the State Department, Foreign Liquidation Commission
  • Returned to U.S. custody 10 July 1947, sold to Anthonio Theuma of Malta and named Nanridi
  • Renamed Monte Carmelo
  • Sold at Gibralter
  • Confiscated by Italian authorities at Palermo, Sicily for tobacco smuggling
  • 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 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
    BYMS-31 63k As completed
    Imperial War Museum photo IWM (FL 7331)
    Mike Green

    There is no DANFS history available for BYMS-2031
    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 British Motor Minesweeper (BYMS) Photo Index

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    This page created and maintained by Joseph M. Radigan
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