| Navy | The Royal Navy |
| Type | Motor minesweeper |
| Class | MMS I |
| Pennant | J 577 |
| Built by | Richards Ironworks Ltd. (Lowestoft, England, U.K.) |
| Ordered | 5 Sep 1940 |
| Laid down | |
| Launched | 6 Oct 1941 |
| Commissioned | 26 Jan 1942 |
| Lost | 1945 |
| History | Destroyed by fire in 1945 |
Commands listed for HMS MMS 77 (J 577)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | T/Lt. J Barron, RNVR | 12 Jan 1942 | 31 Jan 1944 |
| 2 | M Steens, RNVR | 31 Jan 1944 | late 1945 |
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