HMS E9

HMS E9 was a British E class submarine built by Vickers, Barrow. She was laid down on 1 June 1912 and was commissioned on 18 June 1914.

Service history
At dawn on 13 September 1914, the submarine, commanded by Lieutenant-Commander Horton, torpedoed the German light cruiser SMS Hela six miles southwest of Heligoland. Hela was hit amidships with the two torpedoes, fired from a range of 600 yards. All but two of her crew were rescued by the German submarine U-18 and another German ship. Although pursued most of the day by German naval forces, E9 managed to reach Harwich safely. Three weeks later, Horton sank the German destroyer S 116 off the mouth of the River Ems. For sinking the cruiser and the destroyer, Horton was awarded the Distinguished Service Order (DSO).

E9 was scuttled outside Helsinki (Helsingfors) 1.5 nmi off Grohara Light in the Gulf of Finland on 3 April 1918 to avoid seizure by advancing German forces.

HMS E9 was salvaged for breaking in Finland in August 1953.