Sinking of Mesudiye

13 December 1914, Sarı Sığlar Bay, inside the Dardanelles

British success

The small, old submarine B11 dived under the minefields guarding the Dardanelles and torpedoed the elderly Ottoman ironclad Mesudiye, a veteran of the Balkan Wars, at anchor. B11 got back out after nine hours submerged.