As built, Bismarck and Tirpitz were equipped with an anti-aircraft battery of sixteen 10.5 cm (4.1 in) C/33 65-caliber guns in eight twin mounts, sixteen 3.7 cm (1.5 in) C/30 guns in eight dual mounts, and twelve 2 cm (0.79 in) C/30 guns in individual mounts.[30] The 10.5 cm guns were the same weapons as used aboard the Scharnhorst class, and were mounted on the first superstructure deck. After Bismarck was sunk in 1941, two amidships guns on Tirpitz were moved forward so as to provide them with better fields of fire.