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NavSource Online: Mine Warfare Vessel Photo Archive

HM BYMS-2171
ex-HM J-971
ex-YMS-171


BYMS-2171 served the Navies of Great Britian and Greece
YMS-1 Class Auxiliary Motor Minesweeper:

  • Laid down 22 May 1942 as YMS-171 by Henry C. Grebe and Co., Chicago, IL
  • Launched 21 November 1942
  • Completed 29 March 1943
  • Transferred to Great Britian 8 April 1943 and reclassified HM J-971
  • Reclassified HM BYMS-2171
  • Returned to U.S. custody 27 April 1946, transferred to Greece and named Keffallina (M 207)
  • Struck from the Naval Register 8 September 1952
  • Struck from the Greek Navy list in 1966
  • Fate unknown.

    Specifications:

  • Displacement 270 t.
  • Length 136'
  • Beam 24' 6"
  • Draft 8'
  • Speed 13 kts.
  • Complement 50
  • Armament: One 3"/50 dual purpose gun mount and two 20mm mounts
  • 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
    YMS-171
    YMS-171 132k 18 March 1943
    Imperial War Museum photo IWM (FL 7342)    		 Mike Green
    HM J-971
    YMS-171 199k . Paul Silverstone
    There is no DANFS History currently available for YMS-171
    Additional Resources and Web Sites of Interest
    Naval Minewarfare Association
    Association of Minemen
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    This page created and maintained by Joseph M. Radigan (of blessed memory) & David Wright
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