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NavSource Online:
Section Patrol Craft Photo Archive

ex-Vigilant (SP 406)


  • The third Vigilant was built in 1909 as Marguerite II by Henry L. Blatz, Philadelphia, PA
  • Acquired by the Navy 19 May 1917 and commissioned USS Vigilant (SP 406) the same day at the Philadelphia Navy Yard
  • Renamed SP-406 in 1918
  • Decommissioned 23 December 1918 at Philadelphia and returned to her owner
  • Fate unknown.


  • Displacement 30 t.
  • Length 72'
  • Beam 14'
  • Draft 3' 8"
  • Speed 10 kts.
  • Complement 13
  • Armament: One 1-pounder and one machine gun
  • Propulsion: Two 25hp 6-cylinder Keystone heavy duty engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Montauk 110k Marguerite II prior to World War I
    U.S. Navy photo NH 89780
    Naval History and Heritage Command

    Commanding Officers
    01ENS John B. Yarnall, USNRF - Awarded the Navy Cross (1918)19 May 1917
    02LT David A. Loebenstein, USNRF1918
    Courtesy Joe Radigan

    View the Vigilant (SP 406)
    DANFS history entry located on the Naval History and Heritage Command website
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    This page created by Joseph M. Radigan and maintained by David Wright
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