To save weight, "Ocean" carried less armour than the "Majestic"s—6 inches in the belt compared to —although the change from Harvey armour in the "Majestic"s to Krupp armour in "Ocean" meant that the loss in protection was not as great as it might have been, Krupp armour having greater protective value at a given weight than its Harvey equivalent. Similarly, the other armour used to protect the ship could also be thinner; the bulkheads on either end of the belt were thick. The main battery turrets were 10 in thick, atop 12-inch barbettes, and the casemate battery was protected with 6 in of Krupp steel. Her conning tower had 12 in thick sides as well. She was fitted with two armoured decks, thick, respectively.