| Navy | The Royal Navy |
| Type | MS Whaler |
| Class | [No specific class] |
| Pennant | FY 680 |
| Built by | Smiths Dock Co., Ltd. (South Bank-on-Tees, U.K.) |
| Ordered | |
| Laid down | |
| Launched | 20 Apr 1932 |
| Commissioned | May 1941 |
| End service | |
| History | Norwegian whaler of Hvalfangerselskap Kosmos A/S (Anders Jahre), Sandefjord, Norway taken over by the Admiralty in November 1940. Renamend HMS Full Moon in September 1941. |
Commands listed for HMS Kos XI (FY 680)
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/A/S.Lt. Henry Robert Jackson, RNVR | 17 Jul 1943 | Dec 1943 |
| 2 | G P Bonner, RNVR | Dec 1943 | mid 1945 |
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