The Iowas are actually the next phase of battleship development, the fast battleship. Before WW1, battleship designers couldn’t build ships that had both speed and armor, so they built slow dreadnoughts with heavy armor and fast battlecruisers with light armor. In WW2, improvements in technology meant that one ship could be armored like a dreadnought, but have the speed of a battlecruiser.
I’ve been up close to those four bigaxx props. that’s some water churning stuff right thar.