Please report any broken links or trouble you might come across to the Webmaster. Please take a moment to let us know so that we can correct any problems and make your visit as enjoyable and as informative as possible.

NavSource Online: Mine Warfare Vessel Photo Archive

Jackdaw (MSC[O] 21)

Call sign:
November - Delta - Alpha - Xray

Jackdaw served the Navies of the United States and Brazil

YMS-1 Class Auxiliary Motor Minesweeper:

  • Laid down 28 December 1942 by Weaver Shipyards, Orange, TX
  • Launched 29 January 1944
  • Completed 28 April 1944
  • Commissioned USS YMS-373, 29 April 1944
    Naval Vessel Register of 1 January 1949 lists plan for decommissioning and placing in reserve at San Diego, CA as February 1947
  • Named Jackdaw and reclassified as a Motor Minesweeper, AMS-21, 18 February 1947
  • Reclassified as a Coastal Minesweeper (Old), MSC(O)-21, 7 February 1955
  • Struck from the Naval Register 1 January 1960
  • Transferred to Brazil 18 January 1960 and renamed Jurva (M 13)
  • Struck from the Brazilian Navy list in 1969
  • Fate unknown.


  • Displacement 270 t.
  • Length 136'
  • Beam 24' 6"
  • Draft 8'
  • Speed 15 kts.
  • Complement 32
  • Armament: One 3"/50 dual purpose gun mount, two 20mm mounts and two depth charge projectors
    1947 - One 40mm mount and two twin .50 cal. machine guns
  • Propulsion: Two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    USS YMS-373
    YMS-373 172k 16 May 1944
    Gulf of Mexico
    Photographed from a ZP-22 blimp based at NAS Houma, LA
    National Archives photos 80-G-271210 and 80-G-271211
    Tracy White
    YMS-373 251k
    YMS-373 134k c. 1945
    San Francisco Bay
    Brian Cleveland
    YMS-373 34k Otto R. Cleveland, crew member
    USS Jackdaw (AMS 21)
    YMS-373 378k 16 April 1951
    Off Long Beach, CA
    U.S. Navy photo NH 93271
    Naval History and Heritage Command
    Jurva (M 13)
    YMS-373 243k c. 1970
    Brazilian Navy photo
    Robert Hurst

    Commanding Officers
    01LT D. Ditzler, USN1950 - January 1952
    02LT T. J. Murphy, USNJanuary 1952 - December 1952
    03LT John Rives Crumpton, Jr., USN - USNA Class of 1948-BDecember 1952 - 1954
    Courtesy of Wolfgang Hechler and Ron Reeves

    Dictionary of American Naval Fighting Ships History:


    A common crow-like bird, easy to tame, that is noted for pilfering small articles.

    YMS-373, commissioned 29 April 1944 was reclassified AMS-21 and given the name Jackdaw 17 February 1947. Struck from the Navy List 1 January 1960 and transferred to Brazil as Jurva (M 13) in January 1963.

    Back To The Main Photo Index Back To the Mine Warfare Ship Photo Index Back to the Auxiliary Motor Minesweeper (YMS) Photo Index Back to the Motor Minesweeper (AMS) Photo Index Back to the Coastal Minesweeper (MSC) Photo Index

    Comments, Suggestions, E-mail Webmaster

    This page created and maintained by Joseph M. Radigan
    All pages copyright NavSource Naval History