Launched on 20 August 1927 and commissioned on 6 November 1929, "Karlsruhe" became a training ship and made a world cruise but weakness in her hull plating meant obliged her to be refitted and structural repairs undertaken at San Diego during the cruise.
Launched on 20 August 1927 and commissioned on 6 November 1929, the ship saw fleet service and engaged in a number of overseas voyages during the 1930s. In 1929 "Karlsruhe" became a training ship and made a world cruise but weakness in her hull plating meant obliged her to be refitted and structural repairs undertaken at San Diego during the cruise.