Did the Royal Navy need a gun calibre between 8-inch cruiser weapons and 14-inch battleship guns?
Short answerNo clear gap justified it; a 9.2-inch weapon would mostly add logistics and maintenance complexity between two established capability tiers.
NotesA middle calibre needs an operational gap to fill. Battleship weapons already provide the heaviest striking power, while 8-inch cruiser guns supply a lighter and more numerous tier. Adding 9.2-inch weapons would require another family of ammunition, mountings, maintenance, and training. A compromise calibre makes sense only when it replaces missing capabilities, not when it duplicates two weapon systems the fleet already supports.