| Navy | The US Navy |
| Type | Minesweeper |
| Class | YMS |
| Pennant | YMS-421 |
| Built by | Henry C. Grebe Co. (Chicago, Illinois, U.S.A.) |
| Ordered | 21 Jul 1943 |
| Laid down | 20 Sep 1943 |
| Launched | 15 Apr 1944 |
| Commissioned | 3 Mar 1945 |
| Lost | 15 Sep 1945 |
| History | Foundered off Okinawa during a typhoon |
We don't have any commands listed for USS YMS-421 (YMS-421)
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