| Navy | The Royal Navy |
| Type | Motor minesweeper |
| Class | MMS I |
| Pennant | J 556 |
| Built by | John Noble Ltd. (Fraserburgh, Scotland, U.K.) |
| Ordered | 5 Sep 1940 |
| Laid down | |
| Launched | |
| Commissioned | 21 Oct 1941 |
| End service | |
| History | Sold in May 1959 |
Commands listed for HMS MMS 56 (J 556)
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 | R C Edwards, RNVR | 19 Oct 1941 | 29 Dec 1942 |
| 2 | T/Lt. Herbert Frank Harvey, RNVR | 29 Dec 1942 | 1 Jun 1944 |
| 3 | P Harvatt, RNVR | 1 Jun 1944 | late 1945 |
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