The Development of the Mark 7 16-Inch Gun on Iowa-Class In the late 1930s, the U.S. commissioned a set of studies for “fast battleship” designs. The General Board, which considered design ...

Iowa-class battleships were massive floating vessels outfitted with nine 16-inch guns that could fire on other vessels or pound targets on land up to 27 miles away. The U.S.' last battleship ...