During the period 20 May–8 June 1915 in the Sea of Marmara, Dardanelles, Turkey, Lieutenant-Commander Nasmith, in command of H.M. Submarine E.11, destroyed one large Turkish gunboat, two transports, one ammunition ship, three store ships and four other vessels.

When he had safely passed the most difficult part of his homeward journey he received information that a cargo of coal was heading towards Istanbul from the Black Sea. Realising that coal was essential for the morale of the besieged city, Nasmith turned back.

When the coal-carrying ship came into sight of the docks, a welcoming committee of municipal grandees soon formed, along with a happy crowd – water, electricity and rail transport had all suffered due to a lack of coal. Hardly had the ship berthed than it mysteriously blew up before the eyes of the astounded crowd. Nasmith successfully slipped out again.