 On 3 May 1915, "Gul Djemal" was on this run, carrying over 4,000 soldiers, when she was torpedoed by the British submarine , sinking in shallow waters up to the superstructure.he British claimed that most of those on board lost their lives, though Turkish and German sources mention a very limited number of casualties.Since "Gul Djemal" had not completely sunk, it was decided that she could be raised and repaired, and afterwards she continued to serve the war effort.