Steam battleships as iterative naval design

This period was a rolling experiment in armour, weapons, machinery, gun position, and hull form rather than a clean break between obsolete ironclads and successful pre-dreadnoughts. Navies were trying to combine the range and seakeeping of an ironclad frigate such as HMS Warrior with the fighting power and survivability of a monitor. Later examples were clad in steel and did not yet resemble the standard Royal Sovereign form, which makes both ironclad and conventional pre-dreadnought unsatisfactory labels. No single design solved every problem: heavily protected low-freeboard ships could dominate on paper yet struggle in rough seas. Royal Sovereign returned to the successful Admiral-class layout, standardized guns at either end around a central secondary battery, and restored seakeeping. That choice shaped the Royal Navy's following battleship generation and, indirectly, the line that led toward Dreadnought.