| Navy | The US Navy |
| Type | Minesweeper |
| Class | YMS |
| Pennant | YMS-21 |
| Built by | Greenport Basin and Construction Co. (Greenport, Long Island, New York, U.S.A.) |
| Ordered | 1 Apr 1941 |
| Laid down | 28 Jun 1941 |
| Launched | 25 Nov 1941 |
| Commissioned | 18 Apr 1942 |
| Lost | 1 Sep 1944 |
| Loss position | 43.06N, 05.54E |
| History | Mined and sunk off Toulon, France in position 43º06'N, 05º54'E. |
We don't have any commands listed for USS YMS-21 (YMS-21)
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