Events
On This Day - June 12
| 1912 | 1912 - 1921: Fearless | Launched |
| 1915 | E20 | Launched |
| 1933 | Shark (N54) | Laid Down |
| 1940 | Narwhal (N45) | HMS Narwhal lays minefield FD 19 (50 mines) off Haugesund, Norway. |
| 1941 | Taku (N38) | HMS Taku torpedoes and sinks the Italian merchant Silvio Scaroniin the Gulf of Syrte 70 nautical miles off Benghazi, Libya. |
| 1941 | Torbay (N79) | HMS Torbay sinks the Italian sailing vessel Gesu E Maria with gunfire off Skyros, Greece. |
| 1941 | Unshaken (P54) | Laid Down |
| 1941 | O24 (Dutch) | Sank the Italian tanker Fianona off Vada, Toscana, Italy with torpedoes and gunfire. Also sank the Italian auxiliary patrol vessel V 121 / Carloforte with gunfire and ramming 36 nautical miles northwest of Gorgona. |
| 1943 | Tarn (P336) | Laid Down |
| 1944 | Sickle (P224) | Sickle signalled that she had spotted a convoy in the approach to Steno Pass. The convoy suspected the presence of a submarine and dropped two depth charges and, although it seems unlikely that this attack accounted for the loss of the submarine, no further contact was made with her. |
| 1944 | Stoic (P231) | HMS Stoic torpedoes and sinks the Japanese transport ship Kainan Maru off Phuket, Siam. |
| 1944 | Tiptoe (P332) | Completed |
| 1959 | Dreadnought (S101) | Laid Down |
| 2006 | Onyx (S21) | Onyx arrives at Barrow where she will eventually become the main attraction at a new Submarine Heritage Centre |
| 2013 | Onyx (S21) | After the planned Submarine Heritage Center failed to materialise. Onyx was towed away from her berth at Barrow to begin her journey to the scrapyard |
| 2018 | Talent (S92) | HMS Talent began intensive training to re-join the frontline operational fleet after a major refit. The Trafalgar Class submarine had completed an extensive multi-million pound maintenance period in HM Naval Base Devonport in Plymouth. |
