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USS Courser (AMS-6)
Career (United States)
Name: USS YMS-201
Builder: Hiltebrant Dry Dock Co.
Kingston, New York
Laid down: 28 August 1942
Launched: 19 November 1942
Completed: 24 July 1943
Commissioned: Date unknown
Reclassified: AMS-6, 17 February 1947
Renamed: Courser, 18 February 1947
Namesake: Probably the courser bird[1]
Reclassified: MSC(O)-6, 7 February 1955
Decommissioned: Date unknown
Struck: 1 November 1959
Fate: Unknown
General characteristics
Class & type: YMS-135 subclass of YMS-1-class minesweepers
Displacement: 270 t
Length: 136 ft (41 m)
Beam: 24 ft 6 in (7.47 m)
Draft: 8 ft (2.4 m)
Propulsion: 2 × 880 bhp General Motors 8-268A diesel engines
2 shafts
Speed: 15 knots (28 km/h)
Complement: 32
Armament: 1 × 3"/50 caliber dual purpose gun mount
2 × 20 mm guns
2 × depth charge projectors

USS Courser (MSC(O)-6/AMS-6/YMS-201) was a YMS-1-class minesweeper of the YMS-135 subclass built for the United States Navy during World War II. She was the second ship of the U.S. Navy to be named Courser.


Courser was laid down as YMS-201 on 28 August 1942 by the Hiltebrant Dry Dock Co. of Kingston, New York; launched 19 November 1942; and completed 24 July 1943.

On 17 February 1947, YMS-201 was reclassified as AMS-6, and named Courser the following day.

Courser was reclassified MSC(O)-6 on 7 February 1955.

Courser was struck from the Naval Vessel Register on 1 November 1959. Her ultimate fate is unknown.


  1. The Dictionary of American Naval Fighting Ships says that she was named after ”one who moves from one point to another or pursues a quarry”. When given names, however, other former YMSs redesignated as AMSs were named after birds.

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