| Navy | The Royal Canadian Navy |
| Type | Minesweeper |
| Class | Bangor |
| Pennant | J 174 |
| Built by | Prince Rupert Dry Dock and Shipyards Co. (Prince Rupert, British Columbia, Canada) |
| Ordered | 23 Feb 1940 |
| Laid down | 20 Jun 1940 |
| Launched | 3 Oct 1940 |
| Commissioned | 22 Aug 1941 |
| Lost | 24 Dec 1944 |
| Loss position | 44.25N, 63.20W (See a map) |
| History | At 14.37 hours on 24 December 1944, U-806 fired a Gnat at HMCS Clayoquot (T/A/Lt.Cdr. A.C. Campbell, RCNVR) which was escorting the convoy XB-139 and hit her after 1 minute 9 seconds. At 14.46 hours, another Gnat was fired at a freighter in the convoy, but this Gnat detonated after 3 minutes in the cat gear of the Canadian minesweeper HMCS Transcona (J 271). The wreck of the Clayoquot has been located outside the approaches to Halifax harbour in position 44º25'N, 63º20'W. There were 8 casualties amongst the crew of HMCS Clayoquot. Hit by U-boat |
Commands listed for HMCS Clayoquot (J 174)
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| Commander | From | To | |
| 1 | T/Lt. George Alexander Victor Thomson, RCNVR | 22 Aug 1941 | 18 Nov 1941 |
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