three sister ships joined her in this unit; their duties typically consisted of training cruises in the North Sea. From 5 to 25 April, she operated with the Training Squadron with its flagship . In September, the Reserve Squadron contributed vessels to the autumn maneuvers; served as the Reserve Squadron flagship, with the coastal defense ships and , the minelaying cruisers and , and the old avisos , , and . The Squadron was organized in Cuxhaven and joined the High Seas Fleet in the German Bight on 8 September. They participated in the main series of exercises off Heligoland, and the squadron was dissolved when the maneuvers ended on 12 September. After completing her annual winter overhaul, returned to the Reserve Squadron in January 1909. Starting on 27 March, she operated with the Training Squadron again, the flagship of which was now the armored cruiser . Between 30 March and 24 April, she cruised in the central Baltic and in the waters around Rügen. She and the rest of the Reserve Squadron joined the autumn maneuvers in August and the battleship replaced as the flagship of the Reserve Squadron. was then transferred to the VII Division in the Reserve Squadron. She continued in this routine in early 1910; she operated with the Training Squadron from 4 to 29 April and cruised in the Skagerrak and the western Baltic. The battleship was scheduled to take part in the autumn maneuvers, but shortly before the fleet assembled for the exercises, both she and were sold to the Ottoman Empire. In Ottoman service In late 1909, the German military attache to the Ottoman Empire began a conversation with the Ottoman Navy about the possibility of selling German warships to the Ottomans to counter Greek naval expansion. After lengthy negotiations, including Ottoman attempts to buy one or more of the new battlecruisers , , and , the Germans offered to sell the four ships of the class at a cost of 10 million marks. The Ottomans chose to buy and , since they were the more advanced ships of the class. The two battleships were renamed after the famous 16th-century Ottoman admirals, Hayreddin Barbarossa and Turgut Reis. They were transferred on 1 September 1910, and German crews took the ships to Constantinople, along with four new destroyers also purchased from Germany. The Ottoman navy, however, had great difficulty equipping the and ; the