The 10.5 cm Flak 38 was a German anti-aircraft gun used during World War II by the Luftwaffe. An improved version was introduced as the 10.5 cm Flak 39
The 10.5 cm SK C/33 was used by the Kriegsmarine, the German Navy. Related to the Flak 38, it was installed on the Bismarck and Scharnhorst classes of battleships as well as the Deutschland- and Admiral Hipper-class cruisers. After the war, it was used for a few years by the French Marine Nationale on the reconstructed ex-Italian light cruisers, Châteaurenaultand Guichen. In the late 1940s, the French also planned to equip the battleship Richelieu with twelve of these mountings, but the project was cancelled due to credit shortage.
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 intended target. The mounting was not properly waterproofed and as the mountings were open to the weather and sea swell, this resulted in a high maintenance burden.