| 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.
| 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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