HMS Monarch was the first seagoing British warship to carry her guns in turrets, and the first British warship to carry guns of 12-inch (300 mm) calibre.
Painting of HMS Monarch by William Frederick Mitchell
Monarch after her 1872 conversion to barque rig.
The dispersal of the International Fleet on 5 December 1880 convened for enforcing the Treaty of Berlin. The Graphic 1880
A gun turret is a mounting platform from which weapons can be fired that affords protection, visibility and ability to turn and aim. A modern gun turret is generally a rotatable weapon mount that houses the crew or mechanism of a projectile-firing weapon and at the same time lets the weapon be aimed and fired in some degree of azimuth and elevation.
A modern naval gun turret (A French 100 mm naval gun on the Maillé-Brézé pictured) allows firing of the cannons via remote control. Loading of ammunition is also often done by automatic mechanisms.
The commander's cupola of a Conqueror tank with a machine gun
BEP vignette In the Turret (engraved before 1863).
HMS Captain was one of the first ocean-going turret ships