A third, or tertiary battery, of weapons lighter than the secondary battery was typically mounted. To simplify the design many later ships used dual-purpose guns to combine the functions of the secondary battery and the heavier guns of the tertiary batteries. Many dual-purpose guns also served in an anti-aircraft role. In addition, dedicated light-caliber rapid-fire anti-aircraft weapons were deployed, often in the scores. An example of this combination was the , which carried a main battery of eight guns, a secondary battery of twelve guns for defense against destroyers and torpedo boats, as well as a tertiary battery of various anti-aircraft guns ranging in caliber from .