title: EOC 10-inch 45-calibre naval gun
text: # EOC 10-inch 45-calibre naval gun
  
  The EOC 10-inch 45 calibre gun were various similar 10-inch naval guns designed and manufactured by Elswick Ordnance Company to equip ships they built and/or armed for several countries before World War I.
  
  ## History
  
  ### Italian service
  
  Elswick supplied later, more powerful "Pattern W" models of its 10-inch 45-calibre guns for the San Giorgio-class armoured cruisers. In Italian service these were known as the Cannone da 254/45 A Modello 1906.
  
  ### Japanese service
  
  The Katori-class battleship Kashima had a secondary armament of four single-gun turrets positioned on each side of the ships superstructure. In Japanese service these guns were known as 10-inch/45 Type 41 naval guns.
  
  ### UK service
  
  Elswick supplied 5 of their 10-inch 45-calibre guns for use on the battleship Constitución that they were building for Chile. Britain took the ship over in 1903 as HMS Swiftsure, and the guns were designated BL 10 inch Mk VI in UK service. These guns fired a 500-pound (227 kg) projectile using 146 pounds 12 ounces (66.6 kg) of cordite MD propellant.
  
  