A dual-purposegun is a naval artillery mounting designed to engage both surface and air targets. Second World War-era capital ships had four classes of
The QF 5.25-inch Mark I gun was the heaviest dual-purposegun used by the Royal Navy during the Second World War. Although considered less than completely
until replaced by the standard widespread dual-purpose5"/38 caliber gun, which was derived from the 5"/25. Guns removed from battleships were probably converted