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NavSource Online: Mine Warfare Vessel Photo Archive


AM-487 was built for Portugal.

AM-478 Class Fleet Minesweeper:

  • Laid down 18 August 1953 as AM-487 by the Burger Boat Co., Manitowoc, WI
  • Launched 1 April 1954
  • Sponsored by Mrs. A. S. Von Wening
  • Reclassified by U. S. Navy as an Ocean Minesweeper, MSO-487, 7 February 1955
  • Completed 3 October 1955
  • Transferred to Portugal 23 November 1955 and named NRP Corvo (M 418)
  • Decommissioned 2 April 1973 and scrapped at Santander, Spain.


  • Displacement 665 t.
  • Length 172'
  • Beam 35'
  • Draft 10'
  • Speed 13.5 kts.
  • Complement 39
  • Armament: One 40mm mount and two .50 cal. machine guns
  • Propulsion: 1,600shp General Motors diesel engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    MSO-487 105k Original photo: c. 1961
    Portuguese Navy photo
    Replacement photo: c. 1961
    Portuguese Navy photo from the 1961/1962 edition of Jane's Fighting Ships
    Original photo: Jane's Fighting Ships
    Replacement photo: Robert Hurst
    Second replacement photo: David Wright

    There is no DANFS history available for MSO-487
    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

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    This page created and maintained by Joseph M. Radigan
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