The 10.5 cm SK C/33 was a German anti-aircraft gun used during World War II by the Kriegsmarine on the Bismarck and Scharnhorst classes of battleships as well as the Deutschland- and Admiral Hipper-class cruisers. They were mounted in pairs on an electrically powered tri-axial mounting, intended to compensate for the motion of the ship and maintain a lock onto the intened target. The mounting was not properly waterproofed so as the mountings were opened to the weather and sea swell, suffered from a high maintenance burden.