designated CLAA-51 because of her primary armament

tlanta, in some works, is designated CLAA-51 because of her primary armament as an anti-aircraft cruiser. Hence, all of the Atlanta-class ships are sometimes designated as CLAA. However, her entire battery of 5-inch (127 mm) guns were dual-purpose (DP) guns, and were capable of being used against both air and surface targets, able to fire anti-aircraft, high-explosive and armor-piercing shells.

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