Naval Historywith Dr. Alex

Q&A · 2:43:43-2:45:16

Why five-inch guns better matched the Atlanta-class mission

Six-inch guns would improve surface combat, but the Atlanta class gained more from the five-inch weapon's anti-aircraft usefulness and logistical commonality.

5-inch Guns6-inch GunsAnti-Aircraft WarfareAtlanta Class CruisersNaval Logistics
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Question

Would a six-inch-gun design have made more sense for the Atlanta class?

Short answer

Not overall; six-inch guns help against cruisers, while five-inch guns better served anti-aircraft and logistical needs.

Notes

A six-inch Atlanta would carry more useful firepower against other cruisers. That advantage does not solve the class's main anti-aircraft requirement, for which the five-inch gun was better suited. Keeping the five-inch battery also simplified ammunition and support across the fleet. A six-inch version may look more impressive as a small cruiser, but the historical calibre better aligned weapon, mission, and logistics.