The twin 4.7-inch dual-purpose alternative

Could twin 4.7-inch/50 dual-purpose mounts replace the separate anti-aircraft and secondary batteries on an F3-derived capital ship?

Possibly, but the mounting would need a full redesign, and a capital-ship installation might be ready well before a lighter destroyer version.

A viewer proposes replacing separate 4.7-inch and six-inch batteries with eight to ten twin 4.7-inch/50 dual-purpose mounts. The logic is plausible, though the 5.5-inch route discussed earlier remains the preferred alternative in this comparison. Either choice would require a complete mounting redesign rather than a simple reuse of an existing gun installation. The historical sequence of the 4.5-inch weapon shows that a capital-ship mounting could plausibly enter service before a lighter destroyer version, limiting the immediate standardization benefit.