 The ship's waterline armor belt was 305 mm (12 in) thick and tapered to a thickness of 100 mm (3.9 in) at its bottom edge; above it was a strake of 229 mm (9 in) armor. The main deck armor was 69 mm (2.7 in) while the lower deck was 75 mm (3 in) thick. The turrets were protected with an armor thickness of 305 mm on the face, 230 – 190 mm (9.1 – 7.5 in) on the sides, and 152 – 127 mm (6.0 – 5.0 in) on the roof. The barbettes of the turrets were protected by armor 305 mm thick, while the casemates of the 140 mm guns were protected by 25 mm armor plates. The sides of the conning tower were 369 mm (14.5 in) thick.
