| Navy | The Royal Navy |
| Type | Motor minesweeper |
| Class | MMS I |
| Pennant | J 778 |
| Built by | Richard Irvin & Sons (Peterhead, Scotland, U.K.) |
| Ordered | 9 Jun 1942 |
| Laid down | |
| Launched | 10 Nov 1942 |
| Commissioned | 8 Mar 1943 |
| Lost | 14 Sep 1944 |
| History | Wrecked off St. Malo, France on 14 September 1944, beyond salvage |
Commands listed for HMS MMS 278 (J 778)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | K J Dawe, RNVR | 13 Feb 1943 | 22 Apr 1943 |
| 2 | T/Lt. Vivian Adams Mawson, RNVR | 22 Apr 1943 | 8 Jun 1943 |
| 3 | T/Lt. Edward Harwood Batt, RNVR | 8 Jun 1943 | 14 Sep 1944 |
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