| Navy | The Royal Navy |
| Type | Submarine |
| Class | H |
| Pennant | N 50 |
| Built by | William Beardmore & Co. (Dalmuir, Scotland) |
| Ordered | Oct 1917 |
| Laid down | 23 Jan 1918 |
| Launched | 25 Oct 1919 |
| Commissioned | 13 Jan 1920 |
| End service | 13 Jun 1945 |
| History | Decommissioned on 13 June 1945. Sold to be broken up for scrap to West of Scotland shipbreakers, Troon, Scotland in July 1945. |
Commands listed for HMS H 50 (N 50)
Please note that we're still working on this section.
| Commander | From | To | ||
| Charles Ernest Oxborrow, RN | 20 Jun 1942 | |||
| 1 | Lt.Cdr. (retired) John Robert Garstin Harvey, RN | 7 Oct 1939 | 9 Apr 1940 | |
| 2 | Lt. Archibald Rider Cheyne, RN | 9 Apr 1940 | Sep 1940 | |
| 3 | Lt. Geoffrey Vernon Prowse, RN | Sep 1940 | 11 Nov 1940 | |
| 4 | Lt. Michael Willmott, RN | 11 Nov 1940 | 1 Mar 1941 | |
| 5 | Lt. Peter Robert Helfrich Harrison, DSC, RN | 1 Mar 1941 | 26 Apr 1941 | |
| 6 | Lt. Arthur George Chandler, RNR | 26 Apr 1941 | 29 Sep 1941 | |
| 7 | Lt. Edward Talbot Stanley, RN | 29 Sep 1941 | 26 Jan 1942 | |
| 8 | Lt. Hugh Bentley Turner, RN | 26 Jan 1942 | 21 Mar 1942 | |
| 9 | Lt. Michael Lindsay Coulton Crawford, DSC, RN | 21 Mar 1942 | Jun 1942 | |
| 10 | Lt. Anthony Robert Profit, DSC, RN | 20 Jun 1942 | ||
| 11 | T/Lt. Connel Percy Thode, RNZNVR | Jul 1942 | 17 Aug 1942 | |
| 12 | Lt. George Edward Hunt, DSC, RN | 17 Aug 1942 | ||
| 13 | Lt. Anthony Robert Profit, DSC, RN | Nov 1942 | 28 Nov 1942 | |
| 14 | Lt. Roy Bowmaker Foster, DSC, RN | 28 Nov 1942 | ||
| 15 | Lt. Guy Stewart Chetwode Clarabut, RN | 19 Jan 1943 | 24 Apr 1943 | |
| 16 | Lt. John Martin Michell, RN | 24 Apr 1943 | 6 Sep 1943 | |
| 17 | Lt. John Cromwell Varley, RN | 6 Sep 1943 | 25 Oct 1943 | |
| 18 | Lt. John Francis Michell, RN | 25 Oct 1943 | 27 Dec 1943 | |
| 19 | T/Lt. Frank Albert Wicker, RNVR | 27 Dec 1943 | 14 Sep 1944 | |
| 20 | T/Lt. Frederick Eustace King, RNVR | 14 Sep 1944 | 21 Mar 1945 | |
| 21 | T/Lt. George Paton Christie, DSC, RNR | 21 Mar 1945 | 7 Jun 1945 | |
| 22 | Lt. Peter Tremayne Miles, RN | 7 Jun 1945 | ||
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