Her waterline belt measured thick, but tapered to at its lower edge. It extended from the rear of 'A' barbette to the centre of 'Y' barbette. Oddly, it was reduced to abreast 'A' barbette. A extension ran from 'A' barbette forward to the bow and a similar 4 inch extension ran aft to the stern. An bulkhead was angled obliquely inwards from the end of the main belt to the side of 'X' barbette to fully enclose the armoured citadel at middle deck level. An 8-inch belt sat above the main belt, but only ran as high as the main deck. One major problem with "Dreadnought"s armour scheme was that the top of the 11 inch belt was only above the waterline at normal load and it was submerged by over 12 inches at deep load, which meant that the waterline was then protected only by the 8 inch upper belt.