| Navy | The Royal Navy |
| Type | MS Trawler |
| Class | [No specific class] |
| Pennant | FY 621 |
| Built by | Smiths Dock Co., Ltd. (South Bank-on-Tees, U.K.) |
| Ordered | |
| Laid down | |
| Launched | 10 Jun 1914 |
| Commissioned | Aug 1939 |
| End service | |
| History | Completed in August 1914. Sold in 1945. |
Commands listed for HMS Brock (FY 621)
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. Albert Victor Setterfield, RNR | 12 Jun 1940 | 10 Aug 1940 |
| 2 | T/Skr. George Henry Roach, RNR | 10 Aug 1940 | 31 Oct 1940 |
| 3 | T/Skr. Alexander Duthie Menzies, RNR | 31 Oct 1940 | 4 Apr 1941 |
| 4 | T/Skr. William John Tiller, RNR | 4 Apr 1941 | 29 May 1943 |
| 5 | T/Skr. Ronald Charles Heather, RNR | 29 May 1943 | late 1945 |
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