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 canceled Montana-class battleship.
The Iowa-class battleship USS Iowa fires a full broadside of her 16"/50 (406 mm) Mark 7 guns. The roiling water caused by the stupendous muzzle blast creates an illusion of the ship moving sideways from the guns' recoil.
Yard workers hoist one of nine 16"/50 Mark VII gun barrels aboard the USS Iowa during her construction in 1942.
The 16-inch/50 caliber Mark 7 guns of the forward turret of the battleship USS Wisconsin (BB-64) fire at enemy targets ashore on the Korean Peninsula on 30 January 1952 during the Korean War.
Employees working with the automatic 16-inch powder stacking machine at Naval Ammunition Depot Hingham, Mass. during World War II.
Montana-class battleship
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The Montana class was a planned set of battleships for the United States Navy. Intended as the successor to the Iowa class, the Montanas were to be slower but larger, better armored, and better armed.
16-inch/50-caliber Mark 7 gun
…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 canceled Montana-class battleship. Due to a lack of communication during design in 1938, the Bureau of Ordnance assumed the Iowa class would use the 16-inch (406 mm)/50 Mark…
USS Missouri of the Iowa class, the predecessors of the planned Montana class
1940 study plan, BB-65 Scheme 4 (BB 65-4)
One variant of the fast BB 65-8 design scheme from 1940
An artist's impression of the Montana class