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NavSource Online: Mine Warfare Vessel Photo Archive


AMS-139 was built for France but tranferred to Spain.

Nalón (M 21) call sign:
Echo - Bravo - India - Golf

Adjutant Class Motor Minesweeper:

  • Laid down as AMS-139 by the South Coast Co., Newport Beach, CA for transfer to France as Oeillet (M 691)
  • Launched, 22 November 1952
  • Completed 1 February 1954
  • Transferred to Spain 16 February 1954
  • Reclassified by U. S. Navy as a Coastal Minesweeper, MSC-139, 7 February 1955
  • Commissioned Nalón (M 21), 30 April 1955
  • Reclassified as a Patrol Craft, PVZ-51 in 1980
  • Reclassified P-51 in 1986
  • Struck from the Navy Register in 1993
  • Sunk as an artificial reef in Mazarrón Bay, 6 June 1999.


    Displacement 362 t.
    Length 144' 3"
    Beam 27' 2"
    Draft 12'
    Speed 13 kts.
    Complement 40
    Armament: One twin 20-mm mount

  • 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
    MSC-139 65k c. 1955
    Spanish Navy photo from the 1956/1957 edition of Jane's Fighting Ships
    Robert Hurst
    Nalon 56k Nalón (P 51) at Marin, Pontevedra, Spain. c. May 1987. Ignacio López

    There is no DANFS history available for MSC-139
    Additional Resources and Web Sites of Interest
    Association of Minemen

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    This page created and maintained by Joseph M. Radigan
    © 2005 Joseph M. Radigan © 1996 - 2005 NavSource Naval History. All Rights Reserved.