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NavSource Online: Mine Warfare Vessel Photo Archive

YMS-419 / AMS-27 / MSC(O)-27 Mockingbird


Mockingbird served the Navies of the United States and the Republic of Korea.

YMS-1 Class Auxiliary Motor Minesweeper: Laid down, 17 September 1943 at Henry C. Grebe and Co., Chicago, Ill.; Launched, 23 march 1944; Commissioned, 18 November 1944 as USS YMS-419; Redesignated as a Motor Minesweeper AMS-27 and named Mockingbird, 17 February 1947; Redesignated as a Coastal Minesweeper, (Old) MSC(O)-27, 7 February 1955; Decommissioned, 6 January 1956; Transferred to South Korea and renamed Kochang (MSC(O)-521); Struck from the Naval Register, (date unknown). Fate unknown.

Specifications: Displacement 270 t.; Length 136'; Beam 24' 6"; Draft 8'; Speed 15 kts; Complement 32; Armament one single 3"/50 gun mount, two 20mm, two dcp; Propulsion two 1,000 shp General Motors diesel engines, two shafts.
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Size Image Description Source
Mockingbird 117k c. 1944/1945.
U.S. Navy Photo NH-96909
Naval Historical Center
Mockingbird 64 c. 1945
U.S. Navy Photo NH-79733
Naval Historical Center
Mockingbird 121 USS Mockingbird (AMS-27) deploys an acoustic hammer box during sweep operations off Wonsan, Korea, in October 1950. The original photo is dated 23 October 1950.
Official U.S. Navy Photograph, now in the collections of the
National Archives.
U.S. Navy Photo 80-G-422164
Naval Historical Center
Mockingbird 68k Mockingbird (AMS-27) explodes an enemy mine in the Chinnampo area, off North Korea's Yellow Sea coast. Original photo is dated,
3 March 1953.
U.S. Navy Photo 478497
Naval Historical Center
AMS-8 75k Curlew (AMS 8), Mockingbird, Heron (AMS 18), and Gull (AMS 16) nested at Sasebo, Japan. c. 1953. Wayne Schafer
Mockingbird 58k Sasebo, Japan. c. 1953. Wayne Schafer
Mockingbird 47k U.S. Navy Photo NH 96909 -
Mockingbird 49k Seen here as South Korean Kochang MSC(O)-521 -

View the Mockingbird (AMS-27)
DANFS History entry located on the Haze Gray & Underway Web Site. The main archive for the DANFS Online Project.

Crew Contact And Reunion Information
U.S.Navy Memorial Foundation
Fleet Reserve Association

Additional Resources and Web Sites of Interest
Naval Minewarfare Association
Association of Minemen

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