| Navy | The Royal Navy |
| Type | Submarine |
| Class | T |
| Pennant | N 17 |
| Built by | Scotts Shipbuilding & Engineering Co. (Greenock, Scotland) |
| Ordered | 20 Jul 1937 |
| Laid down | 5 Oct 1937 |
| Launched | 17 Oct 1939 |
| Commissioned | 8 Mar 1940 |
| Lost | 10 Apr 1940 |
| Loss position | 56.43N, 06.33E |
| History | HMS Tarpon (Lt.Cdr. Herbert James Caldwell, RN) left Portsmouth for Rosyth on 5 April 1940. She was diverted to patrol around Norway on 6th. Most likely sunk around 0600 hours on 10 April 1940 by the German 'Q-ship' Schiff 40 / Schürbek west of Jutland, Denmark in position 56º43'N, 06º33'5"E. Reported overdue on 22 April 1940. Tarpon attacked the German vessel with two torpedoes. Both missed and Tarpon was most likely sunk by depth charges in the counter attack. |
Commands listed for HMS Tarpon (N 17)
Please note that we're still working on this section.
| Commander | From | To | |
| 1 | Cdr. Robert Cecil Somers Garwood, RN | 30 Sep 1938 | 10 Jan 1940 |
| 2 | Lt.Cdr. (retired) Charles Bate Limpright Wren, RNR | 10 Jan 1940 | 12 Mar 1940 |
| 3 | Lt.Cdr. Herbert James Caldwell, RN | 12 Mar 1940 | Apr 1940 |
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Noteable events involving Tarpon include:
20 Mar 1940
HMS Tarpon (Lt.Cdr. H.J. Caldwell, RN) arrived at Portsmouth from the Clyde.
26 Mar 1940
HMS Tarpon (Lt.Cdr. H.J. Caldwell, RN) departed from Portsmouth for Portland where she arrived later the same day.
3 Apr 1940
HMS Tarpon (Lt.Cdr. H.J. Caldwell, RN) departed from Portland for Portsmouth where she arrived later the same day.
5 Apr 1940
HMS Tarpon (Lt.Cdr. H.J. Caldwell, RN) departed from Portsmouth bound for Rosyth. En-route she was diverted to patrol off Jutland.
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