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Patrol Yacht Photo Archive

Tourmaline (PY-20)

Call sign:
Nan - Able - Sugar - Yoke

Patrol Yacht:

  • Laid down 9 January 1930 as the yacht Sylvia by Bath Iron Work, Inc., Bath, Maine
  • Launched, 24 May 1930
  • Delivered 2 July 1930
  • Acquired by the Navy, 16 May 1941
  • Entered Marine Basin Co. yard, Brooklyn, NY, 23 June 1941 for conversion to Naval service
  • Commissioned USS Tourmaline (PY-20), 19 September 1941 at New York Navy Yard, Brooklyn
  • Rescued eight survivors 18 March 1942 along with USCGC Cuyahoga (WPC 157) from British tanker San Demetrio, sunk by German submarine U-404 on 16 March 1942
  • Decommissioned, 18 July 1945
  • Struck from the Naval Register, 13 August 1945
  • Transferred to the Maritime Commission, 3 January 1946 for disposal
  • Sold 23 January 1946 to Andrew M. Embiricos and Manuel E. Kulukndis of the Greek War Relief Association and renamed Sylvia
  • Sold in 1947, worked as a passanger ship and renamed Kyknos
  • Laid up at Volos, Greece between 1974/1979
  • Scrapped in 1979.


  • Displacement 750 t.
  • Length 154'
  • Beam 26' 6"
  • Draft 10' 6"
  • Speed 13 kts.
  • Complement 161
  • Armament: Two 3"/50 dual purpose gun mounts, four .50 cal. machine guns and two depth charge tracks
  • Propulsion: Two 850hp Cooper Bessemer 8-JRDR diesel engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Motor Yacht Sylvia
    Tourmaline 64k . .
    Tourmaline 30k
    Tourmaline 89k
    Tourmaline 251k
    USS Tourmaline (PY 20)
    Tourmaline 204k Tourmaline at the New York Navy Yard, New York. Wearing Measure 1 camouflage scheme; with ship's designator (PY-20) in black on bow. A British cruiser is dimly visible in the left background
    National Archives photo 19-N-25370
    Mike Green
    Tourmaline 231k Original photo: Tourmaline at Brooklyn [NY] in August 1941, in dark early-wartime camouflage
    National Archives photo 19-N-25372 from the Dictionary of American Naval Fighting Ships
    Replacement photo: Tourmaline off the New York Navy Yard, Brooklyn, New York, in August 1941. A "4-piper" under refit at right, in background
    National Archives photo 19-N-25372
    Original photo: Robert Hurst
    Replacement photo: Mike Green
    Tourmaline 28k c. 1943
    U.S. Navy photo
    Joe Radigan
    Tourmaline 60k 23 November 1944 Robert Hurst
    MV Kyknos
    Tourmaline 183k . Harris Alexandris

    View the Tourmaline (PY-20)
    DANFS History entry located on the Naval History and Heritage Command Website
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    This page created by Gary P. Priolo and maintained by Joe Radigan
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