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NavSource Online:
Patrol Yacht Photo Archive

Ruby (PY 21)



Call sign:
Nan - Baker - George - Mike

Patrol Yacht:

  • Built in 1930 as the yacht Placida by Bath Iron Work, Inc., Bath, Maine
  • Purchased by the Navy 19 June 1941
  • Renamed Ruby and designated as a Patrol Yacht PY-21, 6 July 1941
  • Commissioned 23 September 1941 at Jacksonville, FL
  • Decommissioned 25 July 1945 at Boston, MA
  • Struck from the Naval Register 13 August 1945
  • Transferred 26 December 1945 to the Maritime Commission for disposal
  • Fate unknown.

    Specifications:

  • Displacement 640 t.
  • Length 190' 11"
  • Beam 26' 6"
  • Draft 10' 6"
  • Speed 13.5 kts.
  • Complement 67
  • Armament: One 3"/50 dual purpose gun mount and four 1.1"/75 caliber anti-aircraft guns
  • Propulsion: Two 1,600bhp Cooper Bessemer JR-8 diesel engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Motor Yacht Placida
    Ruby 136k
    USS Ruby (PY 21)
    Ruby 110k
    Ruby 290k 19 November 1942
    Charleston Navy Yard, Charleston, SC
    In Dry Dock No. 2. Moored behind Ruby is YMS-37 along with Army dredge Howell, Army QTR No. 2, Army barges No. 7, 17 and 4, YC-579, and YP-429
    U.S. Navy photo 1756-42
    Robert Hall
    Ruby 77k 8 March 1943

    View the Ruby (PY 21)
    DANFS History entry located on the Naval History and Heritage Command Website
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