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NavSource Online: Mine Warfare Vessel Photo Archive


Call sign:
Nan - Baker - Uncle - 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
    05LT M. W. Rannels, USNR1945
    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 Type Index Back to the Submarine Chaser (PC) Photo Index

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    This page is created and maintained by Joseph M. Radigan
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