| Navy | The Royal Navy |
| Type | Motor minesweeper |
| Class | MMS I |
| Pennant | J 603 |
| Built by | Shelburne Shipbuilders (Shelburne, Canada) |
| Ordered | 13 Jan 1941 |
| Laid down | |
| Launched | 4 May 1942 |
| Commissioned | 30 Sep 1942 |
| End service | |
| History | Sold in October 1956 |
Commands listed for HMS MMS 103 (J 603)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | C Greening, RNR | Feb 1943 | 17 Apr 1943 |
| 2 | T/Lt. Francis Henry Wilson Graybrook, RNR | 17 Apr 1943 | mid 1943 |
| 3 | Frank Cecil Villiers Murray, RNVR | mid 1943 | Dec 1944 |
| 4 | A Montgomery, RNVR | Dec 1944 | 17 Mar 1945 |
| 5 | R J Bates, RNVR | 17 Mar 1945 | early 1946 |
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