SMS Helgoland (1909)

SMS Helgoland was the lead ship of the Helgoland-class battleships of the German Imperial Navy (Kaiserliche Marine). Commissioned in 1911, the Helgoland-class represented a significant advancement in German battleship design, being the first to utilize a twelve-inch (30.5 cm) gun battery, abandoning the earlier 28 cm (11 in) armament of previous classes.

The Helgoland participated in major naval actions during World War I, primarily in the North Sea. She saw action during the Battle of Heligoland Bight in 1914 and the Battle of Jutland in 1916, where she sustained damage but remained operational. The ship also took part in Operation Albion in the Baltic Sea in 1917, an amphibious assault against Russian-held islands.

After the war, SMS Helgoland was ceded to the United Kingdom as a war reparation. She was subsequently scrapped in 1921 at Morecambe.