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NavSource Online: Mine Warfare Vessel Photo Archive

Mockingbird (AMc 28)

Call sign:
Nan - Charlie - Charlie - King

Coastal Minesweeper:

  • Built in 1936 as Rio Douro by the Morse Shipyards, Thomaston, ME
  • Acquired by the Navy 30 October 1940
  • Renamed Mockingbird 14 November 1940
  • Commissioned USS Mockingbird (AMc 28), 12 June 1941
  • Decommissioned 18 February 1944
  • Struck from the Navy Register 29 July 1944
  • Transferred to the War Shipping Administration for disposal 23 July 1945
  • Fate unknown.


  • Displacement 189 t.
  • Length 96'
  • Beam 21'
  • Draft 9' 6"
  • Speed 10 kts.
  • Armament: Six .30 cal. machine guns
  • Propulsion: One 6-cylinder direct reversible Cooper Bessemer diesel engine, one shaft.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Rio Douro
    Mockingbird 126k Underway in harbor, prior to her Navy service
    U.S. Navy photo NH 102181
    Naval Historical Center
    Mockingbird 100k In harbor, prior to her Navy service
    U.S. Navy photos NH 102182, NH 102183, NH 102184 and 102185
    Mockingbird 133k
    Mockingbird 81k
    Mockingbird 425k
    USS Mockingbird (AMc 28)
    Mockingbird 67k

    Mockingbird - A small bird of the thrush family, which imitates the calls of other birds; found in the southern United States

    Tommy Trampp
    Photo added 15 December 2021
    Mockingbird 425k c. 1943
    Off the U.S. east coast. Note acoustic minesweeping "hammer" mounted on her bow
    National Archives photo 80-G-411694
    Naval History and Heritage Command

    View the Mockingbird (AMc 28)
    DANFS history entry located on the Haze Gray & Underway website
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