What a 350,000-ton battleship would demand

How could a navy build, modernize and employ a 350,000-ton battleship?

Build it in a purpose-enlarged graving dock with enormous machinery, but several smaller capital ships would usually offer better operational utility.

A ship three times the size of a modern large carrier could carry an extraordinary battery, possibly including 18- or 20-inch guns. It would have to be assembled in an enlarged graving dock and floated out because launching such a hull down ways risks breaking it or losing control of it. Battleship speed would require an immense machinery plant and perhaps six shafts, while later modernization would focus on anti-aircraft weapons and radar rather than replacing the basic propulsion. Several roughly 70,000-ton ships would provide better availability and could concentrate against the single giant hull.