| Navy | The Royal Navy |
| Type | Submarine |
| Class | T |
| Pennant | N 11 |
| Built by | Cammell Laird Shipyard (Birkenhead, U.K.) |
| Ordered | |
| Laid down | 20 Jan 1940 |
| Launched | 18 Mar 1941 |
| Commissioned | 26 Aug 1941 |
| Lost | 6 Aug 1942 |
| Loss position | 34.25N, 22.36E (See a map) |
| History | HMS Thorn (Lt.Cdr. Robert Galliano Norfolk, DSO, RN) was sunk while attacking a convoy about 30 nautical miles south-west of Gavdos Island in position 34º25'N, 22º36'E. At 1230 hours an escorting aircraft was seen to machine-gun the surface of the sea and the Italian torpedo boat Pegaso moved in to investigate. Four minutes after the aircraft attack, Pegaso picked up a contact and carried out seven attacks after which contact was lost. This attack most likely resulted in the loss of HMS Thorn. HMS Thorn was declared overdue on 11 August 1942. Commanding Officer: |
Commands listed for HMS Thorn (N 11)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | Lt.Cdr. Robert Galliano Norfolk, RN | 27 Jun 1941 | 6 Aug 1942 (+) |
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Noteable events involving Thorn include:
30 Dec 1941
HMS Thorn (Lt.Cdr. R.G. Norfolk, RN) torpedoes and sinks the German tanker Campina (3032 GRT) about 5 nautical miles west off Cape Dukato in position 38º35'N, 10º27'E. (see map)
28 Jan 1942
HMS Thorn (Lt.Cdr. R.G. Norfolk, RN) torpedoes and sinks the Italian tanker Ninuccia (4583 GRT) off Cape Planka, Yugoslavia in position 43º30'N, 15º55'E. (see map)
30 Jan 1942
The Italian submarine Medusa (599 tons, offsite link) was sunk in the Adriatic near Promontore, Istria, Italy in position 44º45'N, 13º56'E by the British submarine HMS Thorn (Lt.Cdr. R.G. Norfolk, RN). (see map)
5 Mar 1942
HMS Thorn (Lt.Cdr. R.G. Norfolk, RN) sinks the Italian auxiliary patrol vessel AS 91 / Ottavia (259 GRT) with gunfire of Kefalonia, Greece.
7 May 1942
HMS Thorn (Lt.Cdr. R.G. Norfolk, RN) fires four torpedoes against an Italian convoy in the central Mediterranean about 180 nautical miles north-west of Benghazi, Libya in position 34º34'N, 17º56'E. All four torpedoes missed their intended target(s). (see map)
3 Aug 1942
HMS Thorn (Lt.Cdr. R.G. Norfolk, RN) torpedoes and sinks the Italian transport ship Monviso (5322 GRT) 8 nautical miles bearing 333 from Sidi Sueicher, Libya.