| Navy | The Royal Navy |
| Type | Submarine |
| Class | T |
| Pennant | N 15 |
| Built by | Vickers Armstrong (Barrow-in-Furness, U.K.) |
| Ordered | |
| Laid down | 28 Aug, 1936 |
| Launched | 5 Oct, 1937 |
| Commissioned | 9 Nov, 1938 |
| Lost | 18 Dec, 1940 |
| Loss position | |
| History | HMS Triton (Lt. Guy Claud Ian St Barbe Slade Watkins, RN) left Malta on 28 November 1940 for a patrol in the southern Adriatic. Most likely sunk in the Otranto Strait on or around 18 December 1940. Commanding officers: Lt.Cdr. Edward Fowle Pizey, RN Lt. Guy Claud Ian St Barbe Slade Watkins, RN |
| Noteable events involving Triton include: 10 Sep, 1939 28 Feb, 1940 8 Apr, 1940 10 Apr, 1940 4 Oct, 1940 8 Oct, 1940 |
![]() Fatal Decisions Blandford, Edmund |
Books dealing with this subject include:
|

