Tags: Weapon.
The BL 18-inch Mk I naval gun was a breech-loading naval gun used by the Royal Navy during World War I. It was the largest and heaviest gun ever used by the British. Only the Second-World-War Japanese 40 cm/45 Type 94 had a larger calibre 18.1 inches (46 cm) but the British shell was heavier. The gun was a scaled-up version of the BL 15 inch Mk I naval gun and was developed to equip the large light cruiser (a form of battlecruiser) Furious.
