In 1909, she participated in the first fleet maneuver conducted by the Ottoman Navy in twenty years, part of a reform program initiated by a British naval mission to the Ottoman Empire. Starting in July 1911, "Mesudiye" joined the two pre-dreadnoughts and , four destroyers, and a torpedo boat for a series of exercises that culminated in the routine summer cruise to Beirut. The fleet was returning to Constantinople when Italy declared war, starting the Italo-Turkish War on 29 September 1911. "Mesudiye" and the rest of the fleet moored at Nagara Point on 2 October and returned to Constantinople the following day. "Mesudiye" was thereafter assigned to the Reserve Division, which also included the rebuilt ironclad "Asar-i Tevfik" and the torpedo cruiser . She did not see action during the conflict, since the Ottoman fleet spent the war in port. This was in part due to the rising tensions in the Balkans that presaged the Balkan Wars; the Ottomans kept their fleet in port so it could be prepared for the inevitable conflict.