For the type of late 19th century commercial steam vessel with an unusual hull shape, see turret deck ship
, the first turret ship to see combat.
Turret ships were a 19th-century type of warship, the earliest to have their guns mounted in a revolving gun turret, instead of a broadside arrangement.
The USS Monitor, built in 1862, is famous for being the first ship mounted with a turret. Pressure from the Royal Navy's proponent of turrets, Captain Cowper Phipps Coles, led to the building of HMS Captain to his design in 1869. She was a low freeboard design and capsized during a heavy gale while under sail. HMS Monarch and HMVS Cerberus built at the same time proved more durable and HMS Devastation of 1871 led directly to the modern battleship. Mostly turret ships were monitors, oceangoing and coastal. Ships like the Zhenyuan were used in the Sino-Japanese War and Russo-Japanese War.