Could a battleship built with triple 13.5- or 14-inch turrets later receive twin 15- or 16-inch guns?
Short answerBoth conversions are plausible in principle, with the original larger mounting providing room for heavier twin guns.
NotesThe question compares triple-turret conservatism with later quadruple-mount reliability problems and asks whether the larger installation creates an upgrade path. A triple 13.5-inch mounting could plausibly be rebuilt for twin 15-inch guns. A triple 14-inch mounting might even accept twin 16-inch guns if a navy considered the conversion worthwhile. Unused volume and weight capacity in an early turret system could affect a ship's modernization potential as well as its original armament.