Events
On This Day - October 4
| 1912 | B2 | Sank off Dover after collision with SS Amerika In the early hours of 4 October HMS B2 was on the surface about four miles north east of Dover when the 23,000-ton steamer SS Amerika, on passage from Hamburg to New York, via Southampton, collided with the submarine. B2 was struck just forward of the conning tower, a fatal blow that sent the submarine immediately to the bottom. |
| 1915 | E25 | Completed |
| 1917 | H43 | Laid Down |
| 1937 | Triton (N15) | Launched |
| 1938 | Undine (N48) | Launched |
| 1939 | Seal (N37) | HMS Seal arrived at Alexandria |
| 1939 | Seahorse (S98) | HMS Seahorse moved from Dundee to Rosyth where she was immediately docked. |
| 1940 | Rainbow (N16) | HMS Rainbow was on patrol in the Mediterranean, operating in the Gulf of Taranto and later in the Gulf of Otranto. She was due back in Alexandria on 19th October but failed to return. On 4th October while attacking a convoy Rainbow collided with the Italian M/V Antonietta Costa and was lost with all hands. |
| 1940 | Triton (N15) | HMS Triton torpedoes and sinks the Italian merchant Franca Fassio about 16 nautical miles north of Cape Noli near Genua. |
| 1940 | Rorqual (N74) | HMS Rorqual lays a minefield (50 mines) off Benghazi, Libya. |
| 1941 | Talisman (N78) | HMS Talisman torpedoes and sinks the Vichy-French passenger ship Theophile Gautier off Euboa Island, Greece. |
| 1942 | Traveller (N48) | HMS Traveller departed Beirut for her 4th war patrol. She was ordered to patrol off Crete. |
| 1944 | Sea Rover (P218) | HMS Sea Rover damages two small Japanese vessels with gunfire in the Flores Sea. |
| 1944 | Tally-Ho (P317) | HMS Tally-Ho damages a small Japanese motor vessel with gunfire in the Strait of Malacca. |
| 1944 | Untiring (P59) | HMS Untiring fires 4 torpedoes against the German torpedo boats TA 18 off the Kassandra peninsula, Greece. All torpedoes miss. |
| 2003 | Unicorn (S43) | HMCS Windsor commissioned Halifax NS |
