| Navy | The Royal Canadian Navy |
| Type | Corvette |
| Class | Flower |
| Pennant | K 169 |
| Built by | Port Arthur Shipbuilding Co. (Port Arthur, Ontario, Canada) |
| Ordered | 1 Feb 1940 |
| Laid down | 18 Jun 1940 |
| Launched | 30 Nov 1940 |
| Commissioned | 17 Jun 1941 |
| End service | 19 Jul 1945 |
| Loss position | |
| History | HMCS Rosthern never had the fo'c's'le extended. Decommissioned on 19 July 1945. Commanding Officers: Cdr. Paul Barbour Cross, RCNVR T/Lt. Rendell James Godschal Johnson, RCNVR T/Lt. Sydney Reginald Phillips Annet, RCNVR T/Lt. Ross Franklin Wilson, RCNVR T/Lt. Dudley Raymond Smythies, RCNVR |
Commands listed for HMCS Rosthern (K 169)
Please note that we're still working on this section.
| Commander | From | To | ||
| 1 | W. Russell, RCNR | 17 Jun 1941 | 20 Nov 1941 | |
| 2 | Paul Barbour Cross, RCNVR | 21 Nov 1941 | 24 Nov 1941 | |
| 3 | Rendell James Godschal Johnson, RCNVR | 25 Nov 1942 | 17 Apr 1944 | |
| 4 | Sydney Reginald Phillips Annet, RCNVR | 18 Apr 1944 | 3 Nov 1944 | |
| 5 | Ross Franklin Wilson, RCNVR | 4 Nov 1944 | 6 Apr 1945 | |
| 6 | Dudley Raymond Smythies, RCNVR | 7 Apr 1945 | 19 Jul 1945 | |
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Noteable events involving Rosthern include:
29 Oct 1942
HMCS Rosthern (T/Lt. R.J.G. Johnson, RCNVR) and HMCS Summerside (T/Lt. F.O. Gerity, RCNR) together picks up survivors from the American tanker Pan New York that was torpedoed and damaged by the German submarine U-624 in the North Atlantic about 550 nautical miles west of Malin Head in position 54º58'N, 23º56'W. The corvettes sank the wrecked tanker with gunfire and depth charges.
24 Feb 1943
HMCS Rosthern (T/Lt. R.J.G. Johnson, RCNVR) picks up 39 survivors from the Norwegian merchant Ingria that was torpedoed and sunk in the North Atlantic in position 45º12'N, 39º17'W by the German submarine U-628.
25 Feb 1943
The British destroyer HMS Montgomery (Lt. K.I. Hamilton, DSC and Bar, RN) and the Canadian corvette HMCS Rosthern (T/Lt. R.J.G. Johnson, RCNVR) together pick up 32 survivors from the British merchant Manchester Merchant about 400 nautical miles east-south-east of Cape Race in position 45º10'N, 43º23'W.
7 Mar 1943
HMCS Rosthern (T/Lt. R.J.G. Johnson, RCNVR) picks up 3 survivors from the British merchant Egyptian that was torpedoed and sunk by the German submarine U-230 south-south-east of Cape Farewell in position 56º25'N, 37º38'W.