| Navy | The Royal Navy |
| Type | Submarine |
| Class | H |
| Pennant | N 43 |
| Built by | Armstrong Whitworth (Newcastle-on-Tyne, U.K.) |
| Ordered | Jul 1917 |
| Laid down | 4 Oct 1917 |
| Launched | 3 Feb 1919 |
| Commissioned | 13 Oct 1919 |
| End service | 20 Sep 1944 |
| History | Decommissioned on 20 September 1944.
Sold to be broken up for scrap to West of Scotland shipbreakers, Troon, Scotland in November 1944. |
Commands listed for HMS H 43 (N 43)
Please note that we're still working on this section.
| Commander | From | To | ||
| William Richmond Fell, RN | ||||
| Martin Douglas Hutley, RNR | 15 Mar 1944 | |||
| 1 | Lt.Cdr. William Alexander Keith Napier Cavaye, RN | 7 Oct 1939 | Feb 1940 | |
| 2 | Lt.Cdr. Lawrence St George Rich, RN | Feb 1940 | 15 Apr 1940 | |
| 3 | Lt. George Robson Colvin, RN | 15 Apr 1940 | 13 Sep 1940 | |
| 4 | Lt. Hugo Rowland Barnwell Newton, RN | 13 Sep 1940 | 17 Dec 1940 | |
| 5 | Lt. Ian Lachlan Mackay McGeoch, RN | 17 Dec 1940 | 7 Mar 1941 | |
| 6 | Lt. John Symons Huddart, RN | 7 Mar 1941 | 14 Apr 1941 | |
| 7 | Lt. Hugh Stirling Mackenzie, RN | 14 Apr 1941 | 9 Jun 1941 | |
| 8 | Lt. John Dennis Martin, RN | 9 Jun 1941 | 13 Aug 1941 | |
| 9 | Lt. Arthur Connuch Halliday, RN | 13 Aug 1941 | 11 Dec 1941 | |
| 10 | Lt. Richard Barklie Lakin, DSC, RN | 11 Dec 1941 | 5 Mar 1942 | |
| 11 | Lt. Frederick Danford Gordon Challis, DSC, RN | 5 Mar 1942 | May 1942 | |
| 12 | T/Lt. Richard Percival Reed, RNR | May 1942 | 30 Jun 1942 | |
| 13 | Lt. Anthony Robert Profit, DSC, RN | 30 Jun 1942 | 10 Aug 1942 | |
| 14 | Lt. John Charles Young Roxburgh, DSC, RN | 10 Aug 1942 | 16 Sep 1942 | |
| 15 | Lt. Bruce John Bevis Andrew, DSC, RN | 16 Sep 1942 | 27 Nov 1942 | |
| 16 | Lt. Robert Boyd, DSC, RN | 27 Nov 1942 | 6 Feb 1943 | |
| 17 | Lt. David Swanston, DSC, RN | 6 Feb 1943 | 2 Apr 1943 | |
| 18 | Lt. Philip Henry May, RN | 2 Apr 1943 | May 1943 ? | |
| 19 | Lt. Eric Allan Hamilton, RNR | May 1943 ? | 23 Jul 1943 | |
| 20 | T/S.Lt. Henry Patrick Murray Warde, RNVR | 23 Jul 1943 | 14 Aug 1943 | |
| 21 | Lt. Anthony Francis Murray-Johnson, RN | 14 Aug 1943 | 15 Sep 1943 | |
| 22 | Lt. Iwan Geoffrey Raikes, DSC, RN | 15 Sep 1943 | 13 Oct 1943 | |
| 23 | Lt. Charles Alexander Jacomb Nicoll, RN | 13 Oct 1943 | 21 Oct 1943 | |
| 24 | Lt. Iwan Geoffrey Raikes, DSC, RN | 21 Oct 1943 | ||
| 25 | Lt. Iwan Geoffrey Raikes, DSC, RN | 15 Mar 1944 | 28 Mar 1944 | |
| 26 | Lt. Frank Ronald Lawrence, RN | 28 Mar 1944 | 14 Aug 1944 | |
| 27 | Lt. Peter Minet Staveley, RN | 14 Aug 1944 | ||
| 28 | Lt. William Patrick McLoughlin, RN | 4 Sep 1944 | 20 Sep 1944 | |
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