| Navy | The Royal Navy |
| Type | Motor minesweeper |
| Class | MMS I |
| Pennant | J 757 |
| Built by | Vaughan (St. Andrews, Canada) |
| Ordered | 30 Jan 1942 |
| Laid down | |
| Launched | 3 Mar 1943 |
| Commissioned | 9 Oct 1943 |
| Lost | 11 Dec 1944 |
| History | Mined and sunk off the River, Schelde, Netherlands on 11 December 1944 |
Commands listed for HMS MMS 257 (J 757)
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 | Skr. Charles Walker Snape, RNR | 6 Mar 1944 | 11 Dec 1944 |
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