| Navy | The Royal Navy |
| Type | Motor Gun Boat |
| Class | Fairmile D |
| Pennant | MGB 646 |
| Mod | Motor Gun Boat |
| Built by | Risdon Beazley Ltd. (Northam, England, U.K.) |
| Ordered | 18 Nov 1941 |
| Laid down | |
| Launched | |
| Commissioned | 19 Nov 1942 |
| End service | |
| History | Sold in August 1945 |
Commands listed for HMS MGB 646 (MGB 646)
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 | R A Forbes, RNVR | 28 Sep 1942 | 21 Oct 1943 |
| 2 | B L Knight-Lacklan, RNVR | 21 Oct 1943 | 7 Apr 1945 |
| 3 | P M Davies, RNVR | 7 Apr 1945 | mid 1945 |
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