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NavSource Online: Mine Warfare Vessel Photo Archive


Call sign:
Nan - Baker - Victor - Jig

ex-Constant (AM 86)

Adroit Class Minesweeper:

  • The first Constant was laid down 21 February 1942 by the Commercial Iron Works, Portland, OR
  • Launched 9 May 1942
  • Commissioned USS Constant (AM 86), 21 September 1942
  • Reclassified as a Submarine Chaser, PC-1590, 1 June 1944
  • Decommissioned 19 June 1946 at Pearl Harbor, HI
  • Assigned to the 14th Naval District (Hawaiian Islands) and placed in service for Naval Reserve duty, 28 October 1946
  • Placed in commission, in reserve 5 May 1950
  • Placed in full commission 20 March 1951
  • Placed out of commission, in reserve 21 September 1954 and laid up in the Columbia River Reserve Fleet
  • Decommissioned 22 October 1954
  • Sunk as a target 27 January 1955.


  • Displacement 295 t.
  • Length 173' 8"
  • Beam 23'
  • Draft 6' 6"
  • Speed 16 kts.
  • Complement 65
  • Armament: One 3"/50 dual purpose gun mount, one 40mm mount, five 20mm mounts, two depth charge tracks and two depth charge projectors
  • Propulsion: Two 900hp Cooper Bessemer GNB8 diesel engines (Serial No. 1978 and 1979), Farrel-Birmingham single reduction gear, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    USS Constant (AM 86)
    Constant 55k Bob Daly/PC-1181
    USS PC-1590
    PC-1590 380k Original photo: Bureau of Ships photo
    Replacement photo: Off Able Docks, Pearl Harbor, Territory of Hawaii, en route to West Loch, 15 January 1953
    National Archives photo 80-G-630830 from National Museum of the U.S. Navy
    Original photo: Edib Krlicbegovic
    Replacement photo: Michael Mohl
    PC-1590 167k 27 January 1955
    Sinking after being torpedoed by USS Tiru (SS 416) and USS Stickleback (SS 415) off Oahu, Territory of Hawaii
    National Archives photo 80-G-659441
    David Wright

    Commanding Officers
    01LT Robert Charles Gloss, USNR21 September 1942
    02LT Robin Max Hartmann, USNR16 June 1943
    03LT Warren Alfred Cushing, USNR30 November 1943 - 12 June 1944
    04LTJG Arthur P. Doheny, USNR12 June 1944 - January 1945
    05LT Morris W. Rannels, USNRJanuary 1945 - November 1945
    06LTJG Robert C. Winkler, USNRNovember 1945 - 19 June 1946
    Courtesy of Wolfgang Hechler, Ron Reeves and Joe Radigan

    View the Constant (AM 86)
    DANFS History entry located on the Haze Gray & Underway Website
    Back to the Main Photo Index Back to the Mine Ship Photo Index Back to the Minesweeper (AM) Photo Index Back to the Patrol Craft/Gunboat/Submarine Chaser Ship Index Back to the Submarine Chaser (PC) Photo Index

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    This page created and maintained by Joseph M. Radigan (of blessed memory) & Michael Mohl
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