A large superstructure was built amidships, with a new conning tower, which was given of armor plating. Displacement rose to normally and at full load. The ship's propulsion system was also completely replaced. Two triple-expansion engines were installed, along with sixteen coal-fired Niclausse boilers. The two screw propellers overlapped, so the port side screw was placed slightly ahead of the starboard one. Performance improved to and . Her crew increased to 800 as a result of the modifications. On 15 March 1904, "Mesudiye" completed sea trials and thereafter returned to Constantinople.