SMS Nautilus was a German minelaying cruiser built for the Kaiserliche Marine (Imperial Navy) in the 1900s, the lead ship of the Nautilus class. The ship was built by AG Weser, with her keel laying taking place in December 1905. She was launched in August 1906 and commissioned in March 1907. Nautilus initially carried 186 naval mines and a battery of eight 8.8 cm (3.5 in) guns, but she was later modified to carry 205 mines and, in 1918, numerous light weapons to support amphibious operations.