sentences:  On entering service with the Ottoman Navy, "Kurfürst Friedrich Wilhelm" and "Weissenburg" became "Barbaros Hayreddin" and "Turgut Reis", respectively.After entering service with the Ottoman fleet, the ships suffered from chronic machinery problems, as their crews were not trained to properly maintain their propulsion systems, which reduced their speed to .At the outbreak of the Italo-Turkish War in September 1911, the Ottoman fleet withdrew into the safety of the Dardanelles to avoid confrontation with the much stronger Italian "Regia Marina" (Royal Navy).