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


MSC-256 was built for Denmark.

Grønsund call sign:
Oscar - Victor - Echo - Uniform

AMS-218 Class Motor Minesweeper:

  • Laid down 24 January 1955 as AMS-256 by Stephens Brothers, Inc., Stockton, CA
  • Reclassified as a Coastal Minesweeper, MSC-256, 7 February 1955
  • Launched 12 August 1955
  • Completed 16 September 1956, transferred to Denmark and named Grønsund (M 574)
  • Commissioned 21 September 1956
  • Decommissioned in 1999
  • Fate unknown.


  • Displacement 375 t.
  • Length 144'
  • Beam 27'
  • Draft 8' 3"
  • Speed 14 kts.
  • Complement 39
  • Armament: Two 20mm mounts
    Replaced by one 40mm mount in 1965
  • Propulsion: Two General Motors diesel engines, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    MSC-256 84k . Richard Miller, BMCS, USNR, Ret.
    MSC-221 70k c. 1956
    Inboard of Omøsund (M 576), ex-MSC-221
    Royal Danish Navy photo
    Royal Danish Navy
    MSC-256 45k Royal Danish Naval Museum photo
    MSC-256 544k 25 May 1992
    Photo by L & L van Ginderen from "Conway's All The World's Fighting Ships 1947-1995", Conway Maritime Press
    Robert Hurst

    There is no DANFS History currently available for MSC-256
    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 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