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NavSource Online: Mine Warfare Vessel Photo Archive


MSO-506 was built for Italy

Storione's call sign:
India Alpha - Kilo - Charlie

AM-506 Class Ocean Minesweeper:

  • Laid down 18 August 1953 as AM-506 by Martinolich Shipbuilding Co., San Diego, CA
  • Launched 13 November 1954
  • Sponsored by Mrs. F. L. Ruhlman
  • Reclassified as an Ocean Minesweeper, MSO-506, 7 February 1955
  • Completed 22 February 1956
  • Transferred to Italy and named Storione (M 5431), 23 February 1956
  • Struck from the Navy list 1 March 1997
  • Fate unknown.


  • Displacement 934 t.
  • Length 190'
  • Beam 36'
  • Draft 12'
  • Speed 15 kts.
  • Complement 81
  • Armament: One 40mm mount and two .50 cal. machine guns
  • Propulsion: Two 1,350shp General Motors diesel engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    MSO-506 70k
    MSO-506 97k c. 1957
    Photo courtesy Ing. Auguste Nani from the 1958/1959 edition of Jane's Fighting Ships
    Robert Hurst
    MSC-135 242k 22 April 1957
    Genoa, Italy
    Pioppo (M 5515), ex-MSC-135 is on the left
    Carlo Martinelli
    MSO-506 92k c. 1969
    Italian Navy photo from the 1969/1970 edition of Jane's Fighting Ships
    Robert Hurst
    MSO-506 310k 19 May 2001
    Taranto, Italy
    Carlo Martinelli

    There is no DANFS history available for MSO-506
    Additional Resources and Web Sites of Interest
    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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