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NavSource Online:
Section Patrol Craft Photo Archive

ex-Sylvia (SP 471)


  • Built by Sam Williams, Marco, FL
  • Acquired by the Navy 15 June 1917
  • Commissioned Sylvia (SP 471), 4 September 1917
  • Renamed SP-471, 11 April 1918
  • Beaten to pieces by a hurricane, 9 September 1919 at North Beach Basin, Key West, FL
  • Struck from the Navy list 4 October 1919.


  • Displacement 17 t.
  • Length 48' 6"
  • Beam 11' 6"
  • Draft 3' 1½"
  • Speed 6.9 kts.
  • Complement: Eight
  • Armament: One 1-pounder and one machine gun
  • Propulsion: One 24hp 4-cylinder Standard gasoline engine, one shaft.
    Click on thumbnail
    for full size image
    Size Image Description Source
    SP-471 52k Underway, prior to World War I
    U.S. Navy photo NH 102249
    Naval Historical Center
    USS SP-471
    SP-471 52k In port, during World War I.
    U.S. Navy photo NH 102248
    Naval Historical Center

    View the Sylvia (SP 471)
    DANFS history entry located on the Naval History and Heritage Command web site
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