| Navy | The Royal Navy |
| Type | Armed Yacht |
| Class | [No specific class] |
| Pennant | FY 018 |
| Built by | Day Summers & Co Ltd. (Northam, England, U.K.) |
| Ordered | |
| Laid down | |
| Launched | 1906 |
| Commissioned | |
| Lost | 17 Mar 1941 |
| History | Displacement: 597 tons. Completed in August 1906. Requisitioned by the Admiralty in September 1939. Served in A/S role. Renamed Mollusc in 1939. Bombed and sunk by German aircraft off Blyth on 17 March 1941. |
Commands listed for HMS Medusa (FY 018)
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 | Cdr. (retired) John Gilbert Sutton, RN | 11 Mar 1940 | 6 Sep 1940 |
| 2 | Cdr. (retired) Francis Theodor Hare, RN | 12 Sep 1940 | 30 Nov 1940 |
| 3 | Lt.Cdr. (retired) Robert Harvey Aldworth, RN | 30 Nov 1940 | Mar 1941 |
| 4 | N P Doyle, RNR | Mar 1941 | 17 Mar 1941 |
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Notable events involving Medusa include:
23 Feb 1941
HMS Sunfish (Lt. G.R. Colvin, RN) departed Blyth for Scapa Flow. She was escorted by HMS Mollusc (Lt.Cdr.(Retd.) R.H. Aldworth, RN) until 0440/24 when HMS Brilliant (Lt.Cdr. F.C. Brodrick, RN) took over the escort. (1)
Sources
- ADM 199/400
ADM numbers indicate documents at the British National Archives at Kew, London.