Events
On This Day - September 25
| 1915 | S3 | Completed |
| 1916 | E12 | Able Seaman John Flynn O/N 199688 (Dev) was a member of the crew of Submarine E12 and served at the Dardanelles. He was accidentally drowned in Mudros Harbour and was buried in the East Mudros Military Cemetery on the island of Lemnos in Grave III.F.184. |
| 1918 | H27 | Launched |
| 1919 | L26 | Launched |
| 1942 | Trespasser (P312) | Completed |
| 1944 | Vox (P67) | HMS Vox sinks the Greek sailing vessel Vol with gunfire about 12 nautical miles south-east of Ayiokambos, Larisis, Greece. |
| 1965 | Warspite (S103) | Launched |