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NavSource Online:
Section Patrol Craft Photo Archive

Tamarack (SP 561)


  • Built in 1915 as Elmarlu by Nevins Shipyard, City Island, NY for James H. Ottley of Glen Cove, Long Island, NY
  • Acquired by the Navy 25 June 1917
  • Commissioned USS Tamarack (SP 561), 18 September 1917
  • Struck from the Navy list 21 February 1919 and returned to her owner
  • Renamed Elmarlu
  • Fate unknown.


  • Displacement 27 t.
  • Length 80'
  • Beam 13' 3"
  • Draft 4' 5"
  • Speed 14 mph
  • Armament: Two 1-pounders
  • Propulsion: Two 70hp gasoline engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Tamarack 59k Photo by Edwin Levick Tom Nye
    Tamarack 117k .
    Tamarack 70k Photographed prior to her World War I Naval service.
    U.S. Navy photo NH 102038

    Commanding Officers
    02Chief Quartermaster Theodore Lambert DeCamp, USNRF29 December 1917
    03ENS Alexander White Moffat, USNRF18 February 1918
    Courtesy Joe Radigan

    View the Tamarack (SP 561)
    DANFS history entry located on the Naval Historical Center website
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