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.

This is a list of naval guns of all countries ordered by caliber.

Designed in the early 1970s by General Dynamics, and currently produced by Raytheon, the Phalanx CIWS mount utilizes a 20 mm M61 Vulcan Gatling-style cannon to destroy enemy missiles and aircraft that manage to escape surface-to-air missiles fired from friendly ships.

Remember, American battleships carried nine of these guns! The barrel had 96 rifling grooves (shades of Marlin's micro-groove type rifling, which is typical of cannons). The twist rate was one turn in 25 calibers, or 1:400". The maximum service …

Jul 3, 2013 · 26-inch thick armor from Japanese Yamato class battleship, pierced by a US Navy 16-inch gun firing a .50 caliber shell.

Jan 8, 2018 · The 16"/50 caliber Mark 7 guns aboard the USS Wisconsin were the last ones fired from a US battleship in support of American troops ashore. And they are big — really big.

Jan 19, 2020 · The U.S. 16"/50 Mark 7 is a battleship gun, known as one of the best ever developed. Its design dates back to 1938 when the U.S. Navy started studies for "fast battleships". Through various design challenges and changes, the Mark 7 gun was ultimately chosen for the Iowa-class battleships.

Building and Testing Naval (Battleship) Guns (Update: near the end of WWI, five 14" guns were mounted on special railroad cars to destroy railyards and ammunition dumps up to 25 miles away. The army also used 16" guns in coast defense batteries.)

Jun 20, 2020 · More powerful than the 16"/45 (40.6 cm) Mark 6 guns used on the North Carolina (BB-55) and South Dakota (BB-57) classes, this was possibly the best battleship gun ever put into service.

Dec 7, 2022 · The battleship USS IOWA (BB 61) fires a broadside to starboard from its Mk 7 16-inch guns. The Mark 7 gun fired two basic rounds, a 2,700 pound AP (Armor Piercing), which could penetrate up to 30 feet of concrete; and a 1,900 pound HC (High Capacity) shore bombardment projectile.