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The citadel consisting of the magazines and engine rooms was protected by an STS outer hull plating 1.5 inches (38 mm) thick and a Class A armor belt 12.1 inches (307 mm) thick mounted on 0.875-inch (22.2 mm) STS backing plate; the armor belt is sloped at 19 degrees, equivalent to 17.3 in (439 mm) of vertical class B armor at 19,000 yards.
The first Iowa-class ship was laid down in June 1940; in their World War II configuration, each of the Iowa-class battleships had a main battery of 16-inch (406 mm) guns that could hit targets nearly 20 statute miles (32 km) away with a variety of artillery shells designed for anti-ship or bombardment work. The secondary battery of 5-inch (127 ...
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.
USS Iowa (BB-61) is a retired battleship, the lead ship of her class, and the fourth in the United States Navy to be named after the state of Iowa.Owing to the cancellation of the Montana-class battleships, Iowa is the last lead ship of any class of United States battleships and was the only ship of her class to serve in the Atlantic Ocean during World War II.
The "all or nothing" concept avoided light or moderate thicknesses of armor: armor was used in the greatest practicable thickness or not at all, thereby providing "either total or negligible protection". [2] Compared to previous armoring systems, "all or nothing" ships had thicker armor covering a smaller proportion of the hull.
Naval armor refers to the various protections schemes employed by warships. The first ironclad warship was created in 1859, and the pace of armour advancement accelerated quickly thereafter. The emergence of battleships around the turn of the 20th century saw ships become increasingly large and well armoured.
Main belt thickness along the waterline ranged from 10 to 15 inches (25 to 38 cm), upper belt thickness ranged from 4 to 10 inches (10 to 25 cm). Most ships of the World War II period had a sloped main belt (internal in some classes), to increase resistance to incoming shells; and no upper belt, to save weight.
A close-up look at an Armored Box Launcher unit, this one aboard USS New Jersey. The Mark 143 Armored Box Launcher (ABL) is a four-round protected launch container for the BGM-109 Tomahawk Cruise Missile. Fitted to the Iowa-class battleship following their 1980s recommissioning upgrade, each ABL contains four ready-to-fire Tomahawks. The use of ...