Choosing guns from a ship's role and hull

The choice begins with the ship's rate, role, available hull volume, weight allowance, and armament budget rather than with the largest possible gun. Larger and more strongly framed hulls could accept heavier batteries, but the same high-quality timber might instead build a ship of the line. Heavy American 24-pounder frigates illustrate the wider allocation problem: the United States valued a frigate able to overmatch other frigates, while a larger battle-fleet navy could direct scarce resources toward line-of-battle strength. Existing British frigates also could not simply exchange their 18-pounders for heavier weapons because their structures had not been designed for the added load. The battlecruiser comparison sharpens the force-structure point. German and Japanese designs had to reinforce their battle fleets, while the Royal Navy could emphasize global operations and trade protection because its dreadnought strength already exceeded the High Seas Fleet's dreadnoughts, battlecruisers, and pre-dreadnoughts combined at Jutland. Sending such a ship into the battle line discarded the advantage its design had been bought to provide.