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NavSource Online: Mine Warfare Vessel Photo Archive

ex-HMS J-991

BYMS-2191 served the Navies of Great Britian and Greece.

YMS-1 Class Auxiliary Motor Minesweeper:

  • Laid down 7 September 1942 as YMS-191 by Greenport Basin and Construction Co., Greenport, Long Island, NY
  • Launched, 14 November 1942
  • Completed 1 June 1943 and transferred to the Royal Navy as HMS J-991
  • Renamed HMS BYMS-2191
  • Returned to U.S. custody 15 December 1943, transferred to Greece the same day and named Kos
  • Sunk in the Gulf of Athens 15 April 1944.


  • 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.
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    No image of BYMS-2191 is available at this time

    There is no DANFS history available for BYMS-2191
    Additional Resources and Web Sites of Interest
    Naval Minewarfare Association
    Association of Minemen
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