| Navy | The Royal Navy |
| Type | Submarine |
| Class | U |
| Pennant | P 37 |
| Built by | Vickers Armstrong (Barrow-in-Furness, U.K.) |
| Ordered | 11 Mar 1940 |
| Laid down | 30 Aug 1940 |
| Launched | 12 May 1941 |
| Commissioned | 5 Nov 1941 |
| End service | |
| Loss position | |
| History | Sold to be broken up for scrap on 23 December 1949. Scrapped at Gateshead in May 1950. |
Commands listed for HMS Unbending (P 37)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | Lt. Henry Winter, RN | 10 Sep 1941 | 31 Jul 1942 |
| 2 | Lt. Edward Talbot Stanley, DSC, RN | 31 Jul 1942 | 4 Jun 1943 |
| 3 | Lt. Robert Henry Hugh Brunner, RN | 4 Jun 1943 | 9 Aug 1943 |
| 4 | Lt. John Dennis Martin, DSC, RN | 9 Aug 1943 | 15 Jun 1944 |
| 5 | Lt. Jack Whitton, DSC, RN | 15 Jun 1944 | 30 Apr 1945 |
| 6 | T/Lt. Richard George Wade, RNVR | 30 Apr 1945 | 11 Jul 1945 |
| 7 | Lt. Oliver Lascelles, DSC, RN | 11 Jul 1945 |
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Noteable events involving Unbending include:
8 Oct 1942
HMS P 37 (Lt. E.T. Stanley, DSC, RN) sinks the Italian Lupa II (379 GRT) with gunfire north-east of Djerba, Tunisia in position 33º41'N, 11º44'E. HMS Unbending first fired two torpedoes but these were evaded. (see map)
9 Oct 1942
At 2225 hours HMS P 37 (Lt. E.T. Stanley, DSC, RN) torpedoes and sinks the Italian merchant Alga (1851 GRT) near Djerba, Tunisia in position 34º02'N, 11º05'E. (see map)
19 Oct 1942
HMS P 37 (Lt. E.T. Stanley, DSC, RN) torpedoes and sinks the Italian destroyer Giovanni da Verazzano and the Italian merchant Beppe (4459 GRT) about 30 nautical miles south-west off Lampione Island in position 35º52'N, 12º05E. (see map)
23 Jan 1943
HMS Unbending (Lt. E.T. Stanley, DSC, RN) torpedoes and damages the Italian passenger / cargo ship Viminale (8657 GRT) and sinks the Italian tug Luni (337 GRT) south-east of Capo dell' Armi, Italy in position 37º52'N, 15º45'E. (see map)
9 Feb 1943
HMS Unbending (Lt. E.T. Stanley, DSC, RN) torpedoes and sinks the Italian auxiliary minelayer Eritrea (2517 GRT) 5 nautical miles bearing 103 of Monopoli, Italy in position 40º56'N, 17º36'E. (see map)
10 Feb 1943
HMS Unbending (Lt. E.T. Stanley, DSC, RN) torpedoes and damages the Italian passenger ship Carlo Margottini (855 GRT) in the Adriatic Sea south of Antivari (now Bar), Montenegro in position 41º57'N, 19º07'E. This ship ran ashore and is not listed as a war loss so was most likely salvaged and returned to service. (see map)
10 Mar 1943
HMS Unbending (Lt. E.T. Stanley, DSC, RN) torpedoes and damages the Italian merchant Carlo Margottini (854 GRT, former Yugoslavian Bled) off Gravosa (Gruz, Croatia).
14 Mar 1943
HMS Unbending (Lt. E.T. Stanley, DSC, RN) torpedoes and sinks the Italian merchants Citta di Bergamo (2165 BRT) and Cosenza (1471 GRT, former French Ile Rousse) off Cape Spartivento, Italy in position 37º56'N, 16º07'E. (see map)