 CHAR: SPOILER: When taking cover inside the discovered CSS Texas,  Dirk reassures the others that theyre safe because the walls are  "two feet thick solid iron." The Texas sister ship, CSS Tennessee  II, had armor consisting of "3 layers of 2 in" for a total of 6  inches; and the armor of the USs last battleship, the USS Missouri,  was only 17.3 inches at its thickest point.