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Section Patrol Craft Photo Archive

Hippocampus (SP 654)

Patrol Yacht:

  • Built in 1906 by the New York Yacht, Launch and Engine Co., Morris Heights, New York
  • Leased to the Navy 21 June 1917 from James E. Porter, Chicago, IL
  • Commissioned USS Hippocampus (SP 654), 25 June 1917
  • Decommissioned 30 November 1918 and struck from the Navy Register
  • Returned to her owner 5 April 1919
  • Registered in 1948 to Arthur E. Ladd of Castine, ME as the passenger vessel Hippocampus
  • Fate unknown.


  • Displacement 23 t.
  • Length 56'
    1948 - 47.6'
  • Beam 12'
    1948 - 10.8'
  • Draft 3' 6"
    1948 - 5.6'
  • Speed 9.5 kts.
  • Complement 11
    1948 - One
  • Armament: One 1-pounder and one machine gun
  • Propulsion: One 55hp 4-cylinder 20th Century gasoline engine, one shaft.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Hippocampus 208k Plans of the motor boat Hippocampus (later SP-654) by her builder, New York Yacht, Launch and Engine Company, Morris Heights, New York. The original print is in National Archives' Record Group 19-LCM
    Naval History and Heritage Command photo NH 101821
    Robert Hurst
    Hippocampus 60k Photographed prior to World War I with a rowing boat and several model sailing boats in the foreground
    USN Photo NH 101822
    Naval Historical Center
    Hippocampus 129k Halftone reproduction of a photograph published in a contemporary publication. Hand written notes are on the original print and reflect the compensation paid to the boat's owner for her use by the Navy during World War I
    Naval History and Heritage Command photo NH 99375
    Robert Hurst

    View the Sector Patrol Vessel Hippocampus (SP 654)
    DANFS history entry located on the Haze Gray & Underway website
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