Events
On This Day - April 17
| 1878 | Mercury 1878 - 1919 | Launched at Pembroke Dockyard |
| 1904 | A 4 | Completed |
| 1915 | E 15 (I 95) | Ran aground after trying to enter the Sea of Marmara On 17th April 1915 whilst attempting to run beneath the minefields guarding the Dardanelle Straits, HMS E15 was swept ashore by the strong currents. The submarine ran aground directly under the guns of Fort Dardanus. E15 came under heavy fire from the fort, one shell killing the Captain, another hitting the vessels battery compartment forcing the crew to surrender. Many attempts were made to prevent the submarine falling into enemy hands and finally a torpedo launched from HMS Majestic put paid to Turkish attempts to re-float the submarine. |
| 1915 | E 12 (I 92) | Returning to Harwich from another patrol when she was bombed by enemy aircraft but escaped without damage or casualties. |
| 1918 | M 1 | Completed |
| 1918 | H 1 | Accidentally attacked and torpedoed the Italian H5. The Italian was way out of her position and had wandered into H1's patrol area. |
| 1919 | P 556 | Laid down |
| 1940 | Taku (N 38) | While searching for 5 German destroyers reported to be in her area HMS Taku fires 4 torpedoes against the British destroyer HMS Ashanti. Luckily all torpedoes missed their target. |
| 1941 | Truant (N 68) | HMS Truant sinks the Italian auxiliary submarine chaser V 62/Vanna with gunfire off Apollonia, Libya. |
| 1942 | Shalimar (P 242) | Laid Down |
| 1942 | Sportsman (P 229) | Launched |
| 1944 | Teredo (P 338) | Laid Down |
| 1948 | Acheron (P 411) | Completed |
| 1958 | Porpoise (S 01) | Completed |
| 1963 | Dreadnought (S 101) | Completed |
| 1973 | Swiftsure (S 126) | Completed |
