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NavSource Online: Mine Warfare Vessel Photo Archive

Pinnacle (AM 274)

Call sign:
Nan - Peter - William - Sugar

Pinnacle served the Navies of the United States and the Republic of China

Admirable Class Minesweeper:

  • The first Pinnacle was laid down 1 February 1943 at Gulf Shipbuilding Corp., Chickasaw, AL
  • Launched 11 September 1943
  • Commissioned USS Pinnacle (AM 274), 24 May 1944
  • Decommissioned 9 October 1946 at Sasebo, Japan and laid up in reserve
  • Transferred 15 June 1948 to the Nationalist Chinese Navy and renamed Yung Hsiu (MSF 48)
  • Decommissioned and struck from the Chinese Naval list in July 1972
  • Fate unknown.


  • Displacement 945 t. (fl)
  • Length 184' 6"
  • Beam 33'
  • Draft 9' 9"
  • Speed 14.8 kts.
  • Complement 104
  • Armament: One 3"/50 cal. dual purpose mount, one twin 40mm gun mount, six 20mm gun mounts, one depth charge projector (hedgehogs), four depth charge projectors (K-guns), and two depth
    charge tracks
  • Propulsion: Two 855shp Cooper Bessemer GSB-8 diesel engines, National Supply Co. single reduction gear, two shafts.
    Click on thumbnail
    for full size image
    Size Image Description Source
    USS Pinnacle (AM 214)
    Pinnacle 142k c. 1945 Yu Chu
    Photo added 25 July 2019
    Yung Hsiu (MSF 48)
    MSF-48 12k Chinese Navy

    Commanding Officers
    01LT Joseph Barry Williams, USNR24 May 1944 - 10 November 1945
    02LT Stanley Jaworski, USNR10 November 1945 -9 October 1946
    Courtesy of Wolfgang Hechler, Ron Reeves and R. A. Moody

    View the Pinnacle (AM 274)
    DANFS History entry located on the Haze Gray & Underway Website
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