| Navy | The Royal Navy |
| Type | Submarine |
| Class | T |
| Pennant | N 17 |
| Built by | Scotts Shipbuilding & Engineering Co. (Greenock, Scotland) |
| Ordered | |
| Laid down | 5 Oct, 1937 |
| Launched | 17 Oct, 1939 |
| Commissioned | 8 Mar, 1940 |
| Lost | 10 Apr, 1940 |
| Loss position | 56.43N, 06.33E (See a map) |
| 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. |
