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The BL 18-inch Mk I naval gun was a breech-loading naval rifle used by the Royal Navy during World War I.It was the largest and heaviest gun ever used by the British. [1] Only the Second-World-War Japanese 46 cm/45 Type 94 had a larger calibre, 18.1 inches (46 cm), but it fired a lighter shell.
BL 6 inch Mk XII naval gun 45-caliber United Kingdom: World War I - World War II 152.4 mm (6.00 in) BL 6 inch naval guns Mk XIII – XVIII United Kingdom: World War I - World War II 152.4 mm (6.00 in) BL 6 inch Mk XXII naval gun 50-caliber United Kingdom: 1920s - World War II 152.4 mm (6.00 in) BL 6 inch Mk XXIII naval gun 50-caliber
The 18"/48 caliber Mark 1 – United States Naval Gun was the initial name and design for a large caliber naval gun in the early 1920s. After the Washington Naval Treaty prohibited the development of guns larger than 16 in (406 mm), the gun was relined and finished as a high velocity 16"/56 Mark 4 gun.
BL 16.25-inch Mk I naval gun; BL 18-inch Mk I naval gun; Bofors 40 Mk4; ... Gas-checks in British RML heavy guns; Gyro rate unit; H. Hazemeyer gun mount; M. ML 8-inch ...
The last of these, HMS Furious, was intended to carry only two 18-inch guns, one forward and one aft, far larger and more powerful than the 15-inch weapons that were standard on the Queen Elizabeth and Revenge-class battleships, and the two Renown-class battlecruisers; at the same time her deck and belt armour was at best only 3 inches thick ...
The Japanese guns were of a slightly larger bore than the three British 18-inch naval guns built during World War I, although the shells were not as heavy. Britain had later designed the N3-class battleship with 18-inch guns, but none were built, leaving no Allied naval guns to compare with the Type 94.
In his discussion of the single-ship action in which the French frigate Piémontaise captured the East Indiaman Warren Hastings on 11 June 1805, the naval historian William James compared the 18-pounder medium guns on Warren Hastings with the 18-pounder long guns that the British Royal Navy used. The medium 18-pounder was 6 ft (1.8 m) long, and ...
BL 4.7-inch Mk I and Mk II [18] QF 4.7-inch Mk IX & XII naval gun [19] QF 4.7-inch Mk XI naval gun [20] [page needed] US naval artillery obtained by Lend-Lease and destroyers for bases agreement 3-inch/50-calibre gun [21] 4-inch/50-calibre gun [22] QF 4 inch Mk XII gun on a T-class submarine