| 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
and that we only list Commanding Officers for the duration of the Second World War.
| 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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