| Navy | The Royal Navy |
| Type | Submarine |
| Class | U |
| Pennant | P 54 |
| Built by | Vickers Armstrong (Barrow-in-Furness, U.K.) |
| Ordered | |
| Laid down | 12 Jun 1941 |
| Launched | 17 Feb 1942 |
| Commissioned | 21 May 1942 |
| End service | |
| Loss position | |
| History | Scrapped at Troon in March 1946. Commanding Officers Sub-Lt. Herbert Patrick Westmacott, RN Lt. Jack Whitton, RN Dockyard control ??? Lt. Jack Seward Pearce, RNR Lt. William Gifford Woolam, RN |
Commands listed for HMS Unshaken (P 54)
Please note that we're still working on this section.
| Commander | From | To | ||
| 1 | Lt. Charles Ernest Oxborrow, DSC, RN | 21 May 1942 | 25 Nov 1942 (+) | |
| 2 | S.Lt. Herbert Patrick Westmacott, RN | 25 Nov 1942 | 29 Nov 1942 | |
| 3 | Lt. Jack Whitton, RN | 29 Nov 1942 | ??? | |
| 4 | Lt. Jack Seward Pearce, RNR | 17 Jul 1944 | 8 Sep 1945 | |
| 5 | Lt. William Gifford Woollam, RN | 8 Sep 1945 | Oct 1945 ? | |
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Noteable events involving Unshaken include:
12 Aug 1942
HMS P 54 (Lt. C.E. Oxborrow, DSC, RN) torpedoes and sinks the German merchant Georg L.M. Russ (2890 GRT) off southern Norway in position 58º37'N, 05º30'E. Another ship is missed in the same attack. (see map)
20 Dec 1942
HMS P 54 (Lt. J. Whitton, RN) attacks the French merchant Oasis (1327 GRT) with gunfire off Genova, Italy. No damage is inflicted.
12 Jan 1943
HMS P 54 (Lt. J. Whitton, RN) attacks the Italian merchant Campania (5247 GRT) north-west of Marettimo Island, Italy. All torpedoes fired missed their target.
8 Apr 1943
HMS Unshaken (Lt. J. Whitton, RN) torpedoes and sinks the Italian merchant Foggia (1227 GRT, former French Mont St. Clair) 10 nautical miles bearing 46 off Soussa, Tunisia.
28 Apr 1943
HMS Unshaken (Lt. J. Whitton, RN) torpedoes and sinks the Italian torpedo boat Climene (652 tons) about 25 nautical miles south-west of Marettimo Island, Sicily, Italy in position 37º45'N, 11º33'E. (see map)
29 Apr 1943
HMS Unshaken (Lt. J. Whitton, RN) fires four torpedoes against the French passenger/cargo ship Cap Corse (2444 GRT) off Cape San Vito, Sicily, Italy. All torpedoes fired missed their target.
22 Jun 1943
HMS Unshaken (Lt. J. Whitton, RN) torpedoes and sinks the Italian schooner Giovanni G. (35 GRT) off Augusta, Sicily, Italy.
At 1202 hours (time zone -2), while in position 6.5 nautical miles bearing 302 Cape Murro di Porco a two masted schooner was sighted about 4 nautical miles away. Unshaken closed to attack.
At 1236 hours two torpedoes were fired from 2400 yards. One and a half minute later the schooner was seen to disintegrate in a red flash and a large column of black smoke which give the impression that her cargo was of inflammable nature.
At 1631 hours, while in position 37º03'N, 15º22'E a merchant ship of about 5000 tons escorted by three torpedo boats was sighted, an attack on the merchant was commenced.
At 1656 hours four torpedoes were fired from 3200 yards but non of these hit the target that was zig-zagging wildly. A short counter attack followed.
23 Jun 1943
HMS Unshaken (Lt. J. Whitton, RN) torpedoes and sinks the Italian merchant Pomo (1425 GRT, former Yugoslavian Niko Matkovic, built 1906) off Syracuse, Sicily, Italy in position 37º09'N, 15º15'E.
At 1416 hours (time zone -2) an attack was commenced on a convoy of 2 merchants escorted by 2 'destroyers'. At 1454 hours two torpedoes were fired at a merchant of 3000 tons. One hit was obtained. Unshaken went deep to 120 feet. (see map)
14 Jul 1943
HMS Unshaken (Lt. J. Whitton, RN) sinks the Italian auxiliary patrol vessel No 265 / Cesena (105 GRT) with gunfire off the southern coast of Calabria, Italy in position 39º18'N, 17º16'E. (see map)
19 Jul 1943
Near Malta HMS Unshaken (Lt. J. Whitton, RN) is missed by four torpedoes fired by ORP Dzik. The Poles thought they were attacking an enemy submarine, luckily the torpedoes missed their target.
11 Aug 1943
HMS Unshaken (Lt. J. Whitton, RN) torpedoes and sinks the Italian troop transport Asmara (7192 GRT) 3 nautical miles east of Brindisi, Italy in position 40º44'N, 18º03'E. (see map)
5 Sep 1943
HMS Unshaken (Lt. J. Whitton, RN) torpedoes and damages the Italian tanker Dora C. (5843 GRT) about 10 nautical miles east of Brindisi, Italy.
3 Oct 1943
HMS Unshaken (Lt. J. Whitton, RN) fires three torpedoes against the Italian merchant Nina (2212 GRT) off Elba Island. None of the torpedoes fired hit the target.
7 Apr 1944
HMS Unshaken (Lt. J. Whitton, RN) torpedoes and sinks the German merchant Asien (3894 GRT) off Lista, Norway in position 58º08'N, 06º32'E. (see map)