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-818

BYMS-2018 served the Navies of Great Britain and Korea.

BYMS-1 Class Motor Minesweeper:

  • Laid down 23 July 1941 as BYMS-18 by Bellingham Iron Works, Inc., Bellingham, WA
  • Launched 2 May 1942
  • Completed and transferred to Great Britain 16 July 1942
  • Reclassified HMS J-818 and HMS BYMS-2018
  • Returned to U.S. custody 31 July 1946
  • Transferred to South Korea 30 August 1947
  • Commissioned ROKS Gyeongsan (YMS 515) 21 September 1947
  • Grounded and damaged beyond repair in February 1948
  • Struck from the Naval Register 18 June 1948
  • 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 diesel engines, Snow and Knobstedt single reduction gear, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    BYMS-2018 399k Watercolor painting Chris Hackworth

    There is no DANFS history available for BYMS-18
    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

    Comments, Suggestions, E-mail Webmaster

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