How battleship guns might be designed today

If battleship guns were designed today, how would they differ?

The basic gun would change relatively little, but its mounting would use extensive automation; single versus twin turrets remains disputed.

Very large gun barrels would still face familiar physical constraints. The more likely changes concern their mountings, including extensive automation and a possible preference for single-gun turrets. Single mounts are defended on maintenance grounds, while twin-mount advocates challenge how much deck space a second barrel really costs. The debate also addresses a historical concern that firing one barrel could disturb the accuracy of its neighbor, a concern judged to have been subsequently disproved. Comparisons with modern 4.5-inch, five-inch and three-inch mountings turn the original battleship question into a wider argument about the guns a warship should carry.