| Navy | The Royal Navy |
| Type | MS Trawler |
| Class | [No specific class] |
| Pennant | FY 671 |
| Built by | Smiths Dock Co., Ltd. (South Bank-on-Tees, U.K.) |
| Ordered | |
| Laid down | |
| Launched | 21 May 1917 |
| Commissioned | Feb 1940 |
| End service | |
| History | Completed on 22 June 1917. |
Commands listed for HMS Grosmont Castle (FY 671)
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/Skr. John Russell Watson, RNR | 28 May 1940 | 21 Jul 1940 |
| 2 | Skr. Norman Jinks, RNR | 21 Jul 1940 | 20 Dec 1940 |
| 3 | Lt. Clifford Edgecombe, RNR | 20 Dec 1940 | early 1943 |
| 4 | T/Lt. John Ramsey Key, RNVR | early 1943 | mid 1945 |
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Notable events involving Grosmont Castle include:
24 Sep 1940
The trawler picks up the shipwrecked men of the Faroese sailing ship Union Jack sunk 36 hours earlier by U-31. The arrived at Stornoway on 25 Sept and finally returned to Faroe Islands via ship Vilhelmina. (1)