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NavSource Online: Mine Warfare Vessel Photo Archive

ex-HMS J-827

BYMS-27 served the Navies of Great Britain and Italy

BYMS-1 Class Motor Minesweeper:

  • Laid down 1 October 1941 as BYMS-27 by the Ballard Marine Railway Co., Inc., Seattle, WA
  • Launched 23 May 1942
  • Completed 20 September 1942
  • Transferred to Great Britain and reclassified HMS J-827, 21 September 1942
  • Reclassified HMS BYMS-2027
  • Returned to U.S. custody 23 May 1947; transferred to the State Department, Foreign Liquidation Commission; sold to Italy and named Orleandro (DR 415)
  • Reclassified M-5411
  • Struck from the Naval Register 10 June 1947
  • 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.
    Click on thumbnail
    for full size image
    Size Image Description Source
    HMS J-827
    BYMS-27 51k As completed
    Imperial War Museum photo IWM (FL 7321)
    Mike Green
    HMS BYMS-2027
    BYMS-27 75k c. 1946
    Photo from Jane's Fighting Ships
    Joe Radigan

    There is no DANFS history available for BYMS-27
    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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