 The en-echelon configuration was retained for the two ships of the "Colossus class", but subsequently abandoned in the Royal Navy in favour of centreline mounts at either end of the ship.The en-echelon configuration did not reappear in Royal Navy capital ships until launched in 1909.Each turret weighed 750 tons and was protected by an outer layer of of compound armour, an inner layer of wrought iron, with a total of of teak backing.