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Complementing the 16-in/50 caliber Mark 7 gun was a fire control computer, the Ford Instrument Company Mark 8 Range Keeper. This analog computer was used to direct the fire from the battleship's big guns, taking into account factors including the speed of the targeted ship, the projectile's travel time, and air resistance.
16-inch naval gunfire shells. The large caliber guns were designed to fire two different 16-inch shells: an armor-piercing round for anti-ship and anti-structure work and a high explosive round designed for use against unarmored targets and shore bombardment.
The U.S. Navy had the 16"/50-caliber Mark 2 guns left over from the canceled Lexington-class battlecruisers and South Dakota-class battleships of the early 1920s. However it was already apparent that the Mark 2 was too heavy to arm the North Carolina and new South Dakota (1939) battleship classes which had to adhere to the 35,000 ton standard displacement set by the Second London Naval Treaty.
The first US Navy 16-inch gun was the 16-inch/45 caliber Mark 1 gun, which armed the Colorado-class battleships launched 1920–21. [ 5 ] [ 6 ] The second Navy design, the Mark 2, was intended as armament for the planned South Dakota -class battleships , and also selected for the modified design of the Lexington -class battlecruisers ...
Skelley claimed that one of the 16-inch shells traveled 23.4 nautical miles (40 km), setting a record for the longest conventional 16-inch shell ever fired. Although the shells had been fired without serious incident, Meyer and Petty Officer First Class Dale Eugene Mortensen, gun chief for Turret One, told Skelley that they would no longer ...
USS Iowa (BB-61) fires a full broadside volley during a target exercise near Vieques Island, Puerto Rico, 1 July 1984, showing the muzzle blast from its 16 inch main battery and the pressure effect on the water surface surrounding the ship. A muzzle blast is an explosive shockwave created at the muzzle of a firearm during shooting.
These guns fire high explosive- and armor-piercing shells and can fire a 16-inch shell approximately 23.4 nautical miles (43.3 km; 26.9 mi). [ 35 ] [ 36 ] The guns are housed in three 3-gun turrets: two forward of the battleship's superstructure and one aft, in a configuration known as "2-A-1".
USS Alabama (BB-60) is a retired battleship. She was the fourth and final member of the South Dakota class of fast battleships built for the United States Navy in the 1940s. The first American battleships designed after the Washington Treaty system began to break down in the mid-1930s, they took advantage of an escalator clause that allowed increasing the main battery to 16-inch (406 mm) guns ...