| Navy | The Royal Canadian Navy |
| Type | Minesweeper |
| Class | Bangor |
| Pennant | J 309 |
| Mod | VTE reciprocating engined |
| Built by | Davie Shipbuilding and Repairing Co. Ltd. (Lauzon, Quebec, Canada) |
| Ordered | |
| Laid down | 18 Sep 1941 |
| Launched | 21 Jan 1942 |
| Commissioned | 13 Aug 1942 |
| End service | 1957 |
| History | Decommissioned 18 October 1945. |
Commands listed for HMCS Sarnia (J 309)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | T/Lt. Charles Aitken Mott, RCNR | 18 Aug 1942 | mid 1943 |
| 2 | T/Lt. David Ireland McGill, RCNVR | mid 1943 | 17 Jul 1943 |
| 3 | Lt. Richard Cassels Chenoweth, RCNVR | 18 Jul 1943 | 12 Mar 1944 |
| 4 | T/Lt. Roland Douglas Hurst, RCNVR | 13 Mar 1944 | 9 Oct 1944 |
| 5 | T/Lt. Robert Percy Joel Douty, RCNVR | 10 Oct 1944 | 2 Sep 1945 |
| 6 | T/Lt. Glen Atwood MacPherson, RCNVR | 3 Sep 1945 | 18 Oct 1945 |
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