| Navy | The Royal Navy |
| Type | MS Trawler |
| Class | Tree |
| Pennant | T 100 |
| Built by | Cook, Welton & Gemmill (Beverley, U.K.) : Holmes |
| Ordered | 5 Jun 1939 |
| Laid down | 25 Aug 1939 |
| Launched | 29 Nov 1939 |
| Commissioned | 31 May 1940 |
| End service | |
| History | Sold in 1947. |
Commands listed for HMS Blackthorn (T 100)
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 | Lt.Cdr. John George Hilliard, RNZNVR | 23 Jul 1940 | late 1941 |
| 2 | T/Lt. Edward James Hill, RNVR | late 1941 | 9 Oct 1942 |
| 3 | T/Lt. Algernon William Rous De Horsey, RNVR | 9 Oct 1942 | mid 1945 |
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