180-pound

Updated: May 28, 2025

She carried only two guns, eleven-inchers, both mounted inside her turret, which revolved by machinery; but their 180-pound shot were far more powerful than any aboard the Merrimac. In maneuvering the Monitor enjoyed an immense advantage, with her light draft, strong engines, and well-protected screws and rudder.

William Charles Henry Wood - Captains of the Civil War; a chronicle of the blue and the gray

It was made of iron eight inches thick, and bore two eleven-inch guns throwing each a 180-pound ball. Near the bow rose the pilot-house, made of iron logs nine inches by twelve in thickness. The side armor of the hull was five inches thick, and the deck was covered with heavy iron plates. For three hours the iron-clads fought.

Elisha Benjamin Andrews - History of the United States, Volume 4