Events
On This Day - October 27
| 1905 | Cyclops (F31) 1905 - 1947 | Launched |
| 1933 | Starfish (S 19) | Completed |
| 1942 | Taku (N 38) | HMS Taku sinks the Greek sailing vessel Lora with gunfire off Lemnos, Greece. |
| 1942 | Spirit (P 245) | Laid Down |
| 1944 | Trenchant (P 331) | Chariots released by HMS Trenchant sink the Japanese army cargo ship Sumatra Maru in Phuket harbour, Siam. |
| 2010 | Astute (S 119) | Commander Andy Coles relieved of his command following a grounding incident the previous week. It was subsequently decided that he would not face a court martial. In December 2010 it was announced that Commander Iain Breckenridge, who has previously commanded the submarine HMS Tireless, would take over command. |
