| Navy | The Royal Navy |
| Type | Minesweeper |
| Class | YMS |
| Pennant | J 1021 |
| Built by | J. M. Martinac Shipbuilding Corp. (Tacoma, Washington, U.S.A.) |
| Ordered | 8 Jun 1942 |
| Laid down | 31 Dec 1942 |
| Launched | 22 Apr 1943 |
| Commissioned | 16 Sep 1943 |
| End service | |
| History | Returned to the USN on 12 February 1948. |
| Former name | USS YMS 221 |
Commands listed for HMS BYMS 2221 (J 1021)
Please note that we're still working on this section
and that we only list Commanding Officers for the duration of the Second World War.
| Commander | From | To | |
| 1 | T/Lt. John Balchin Blake, RNR | 23 Sep 1943 | mid/late44 |
| 2 | T/Lt. William Charles Greer Napper, RNVR | mid/late44 | 1 Mar 1946 |
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