In response, the U.S. Navy explored arming its Iowa-class battleships with nuclear artillery shells known as "Katie" (Mk 23) shells in the 1950s. -These 16-inch nuclear shells had yields ...

What You Need to Know: The 16 ... 18.1-inch guns, despite weighing less. “In 1969, Capt. Edward Snyder of the USS New Jersey (an Iowa-class battleship) reported that the armor piercing shell ...