Which year marked the launch of the Navy's first iron-hulled warship?

The launch of the Navy's first iron-hulled warship occurred in 1843 with the USS Princeton. This marked a significant development in naval architecture and warfare technology, as the use of iron in shipbuilding allowed for greater durability and structural integrity compared to traditional wooden vessels. The USS Princeton was notable not only for its iron hull but also for its steam propulsion, showcasing the technological advancements of the era. This shift was critical in the evolution of naval power, as it set the stage for the future fleets that would rely on iron and steel construction, leading to modern naval warfare. The dates associated with the other options do not coincide with this landmark event in naval history, making 1843 the definitive year for the introduction of iron-hulled warships in the U.S. Navy.