SMS Kaiserin[b] was the third vessel of the Kaiser class of battleships of the Imperial German Navy. Kaiserin's keel was laid in November 1910 at the Howaldtswerke dockyard in Kiel. She was launched on 11 November 1911 and was commissioned into the fleet on 14 May 1913. The ship was equipped with ten 30.5-centimeter (12.0 in) guns in five twin turrets, and had a top speed of 22.1 knots (40.9 km/h; 25.4 mph). Kaiserin was assigned to the III Battle Squadron and later the IV Battle Squadron of the High Seas Fleet for the majority of her career, including World War I.
Along with her four sister ships, Kaiser, Friedrich der Grosse, König Albert, and Prinzregent Luitpold, Kaiserin participated in all of the major fleet operations of World War I, including the Battle of Jutland on 31 May and 1 June 1916. The ship was also involved in Operation Albion, an amphibious assault on the Russian-held islands in the Gulf of Riga, in October 1917. She later saw action during the Second Battle of Heligoland Bight in November 1917. (Wiki)