 The lattice mast (or cage mast) section of the /"Maryland"-class battleship was built beside the set of the USS "Nevada" stern section, but not built upon a set of a deck, but on the ground as the footage in the movie only showed the cage mast tower.The large scale model of the stern shows the two aft gun turrets with three gun barrels in each; in reality, "Nevada" had two heightened fore and aft turrets with two barrels each while the lower two turrets fore and aft had three barrels each.Another model of "Nevada", used in the film to portray the whole ship, displays the turrets accurately.