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The 16″/45 caliber Mark 6 gun is a naval gun designed in 1936 by the United States Navy for their Treaty battleships. It was first introduced in 1941 aboard their North Carolina-class battleships, replacing the originally intended 14″/50 caliber Mark B guns and was also used for the follow-up South Dakota class.
What does 16 mean on a gun?
Definition of M16 : a .223 caliber (5.56 millimeter) gas-operated magazine-fed rifle for semiautomatic or automatic operation used by U.S. troops since the mid 1960s.
Why are naval guns measured in inches?
Eventually, when the technology existed, the bore (in inches or millimetres) came to be the standard measure. For naval rifles, the initial change was to actual bore, thus facilitating the manufacture of standard projectiles. In other words, a 12/45 is 12″×45= the length of the rifled bore of that gun in inches.
18-inch/48-caliber Mark 1 gun
| 18″/47 caliber Mark A gun | |
|---|---|
| Mass | 177.0 long tons (179.8 t) |
| Length | 846 in (21,488 mm) |
| Shell | 3,850 lb (1,746 kg) |
| Caliber | 18 in (457 mm) |
The 16″/50 caliber Mark 7 – United States Naval Gun is the main armament of the Iowa-class battleships and was the planned main armament of the cancelled Montana-class battleship….16-inch/50-caliber Mark 7 gun.
| 16″/50 caliber Mark 7 gun | |
|---|---|
| Place of origin | United States |
| Service history | |
| In service | 1943–1992 |
| Used by | U.S. Navy |
What does Caliber mean in naval guns?
calibre, also spelled Caliber, in firearms, unit of measure indicating the interior, or bore, diameter of a gun barrel and the diameter of the gun’s ammunition; or the length of a gun expressed in relation to its interior diameter (now used only of naval and coastal defense guns).