Events
On This Day - September 26
| 1908 | C 21 (I 51) | Launched |
| 1917 | L 33 | Laid Down |
| 1917 | C 4 (I 34) | Fired on a German submarine whilst on the surface and on seeing the U-boat disappear into the darkness assumed that she had missed. After the war when all the logs of the U-boats were obtained it was discovered that the attack had hit the U-boat on her starboard quarter and failed to explode. |
| 1931 | Starfish (S 19) | Laid Down |
| 1933 | O 13 (Dutch) | Ran into and sank fishing boat, HD 7, from Den Helder in the Schulpengat. |
| 1941 | Tetrarch (N 77) | HMS Tetrarch torpedoes sinks the Italian merchant Citta di Bastia in the Aegean Sea about 18 nautical miles south of Milos Island, Greece. |
| 1941 | Tigris (N 63) | HMS Tigris torpedoes and heavily damages the German auxiliary submarine chaser UJ 1201 off the Rolvsoy Fjord. |
| 1961 | Trespasser (P 312) | Scrapped at Gateshead. |
| 1961 | Oracle (S 16) | Launched |
| 1963 | Polaris | First steam-eject launch of Polaris missile at sea off Cape Canaveral, FL (now Cape Kennedy) from USS Observation Island |
