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


AM-450 was built for France

AM-450 Class Minesweeper:

  • Laid down 16 January 1952 as AM-450 by the Bellingham Shipyards Co., Bellingham, WA
  • Launched 15 October 1952
  • Completed 23 December 1953
  • Transferred to France 19 January 1954 and named Berneval (M 613)
  • Reclassified by U.S. Navy as an Ocean Minesweeper, MSO-450, 7 February 1955
  • Struck from the Navy Register in 1987
  • Scrapped at Rotterdam, The Netherlands.


  • Displacement 750 t.
  • Length 171'
  • Beam 35'
  • Draft 10' 4"
  • Speed 15 kts.
  • Complement 39
  • Armament: One 40mm mount and two .50 cal. machine guns
  • Propulsion: Two General Motors diesel engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    M-613 122k c. 1964
    Photo by Stefan Terzibaschitsch from Jane's Fighting Ships
    Robert Hurst
    MSO-450 95k 28 May 1982
    MSO-450 179k c. 1983
    Berneval and Baccarat (M 623), ex-MSO-505 underway

    There is no DANFS history available for MSO-450
    Additional Resources and Web Sites of Interest
    102 Minesweepers (MSO) Oceangoing Minesweepers
    Naval Minewarfare Association
    Association of Minemen
    Back To The Main Photo Index Back To the Mine Warfare Ship Photo Index Back to the Ocean Minesweeper (MSO) Photo Index

    Comments, Suggestions, E-mail Webmaster

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