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-850

Hollandsdiep call sign:
Papa - Alpha - November - Foxtrot

BYMS-50 served the Navies of Great Britain and The Netherlands.

BYMS-1 Class Motor Minesweeper

  • Laid down 9 May 1942 as BYMS-50 by the Gibbs Corp., Jacksonville, FL
  • Launched 7 September 1942
  • Completed 5 April 1943
  • Transferred to Great Britain 14 April 1943 and named HMS J-850
  • Renamed HMS BYMS-2050
  • Returned to U.S. custody 10 April 1946
  • Transferred to the State Department, Foreign Liquidation Commission in March 1947; loaned to The Netherlands and named HNLMS Hollandsdiep (MV 36)
  • Reclassified M-833
  • Returned to U.S. custody 27 July 1947 (on paper only) and sold to The Netherlands
  • Struck from the Naval Register in 1957 and scrapped.


  • 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
    HNLMS Hollandsdiep (MV 36)
    BYMS-2050 67k . Arie van Mazijk
    HNLMS Hollandsdiep (M 833)
    BYMS-2050 56k c. 1955
    Royal Netherlands Navy photo from the 1956/1957 edition of Jane's Fighting Ships
    Robert Hurst

    There is no DANFS history available for BYMS-2050
    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