EOC 12-inch 45-calibre naval gun

EOC 12 inch 45-calibre naval gun 12"/45 41st Year Type
41st Year Type on Mikasa
Type	Naval gun
Place of origin	United Kingdom
Service history
In service	1906–1952
Used by	United Kingdom Brazil Empire of Japan
Wars	World War I
Production history
Designer	Elswick Ordnance Company
Specifications
Barrel length	Bore 45 feet (13.716 m) (45 cal)
Shell	850 pounds (385.6 kg)
Calibre	12-inch (304.8 mm)
Muzzle velocity	2,700 feet per second (823 m/s) - 2,800 feet per second (853 m/s)
Maximum firing range	18,850 yards (17,240 m)

The EOC 12 inch 45 calibre gun were various similar 12-inch wire-wound naval guns designed and manufactured by Elswick Ordnance Company to equip ships that the parent company Armstrong Whitworth built and/or armed for several countries before World War I.