 The 5-inch (127 mm) / 54 cal gun turrets were similar to the 5-inch (127 mm) / 38 cal gun mounts in that they were equally adept in an anti-aircraft role and for damaging smaller ships, but differed in that they weighed more, fired heavier rounds of ammunition, and resulted in faster crew fatigue than the 5-inch (127 mm) / 38 cal guns. The ammunition storage for the 5-inch (127 mm) / 54 cal gun was 500 rounds per turret, and the guns could fire at targets nearly 26,000 yd (24 km) away at a 45°angle. At an 85°angle, the guns could hit an aerial target at over 50,000 ft (15,000 m).
