Well make that Montana, Super Yamato, H39/H44, Lion I and II. These monsters are everywhere now.
Yes don't get into the game too deep, once you do you can't save yourself out of it. Yes the grind is terrible, took me more than five months to save enough credits to buy a battleship and enough experience points to drive one. The Moltke heavy cruiser I bought was always an easy target for the BBs, two salvos max and it's done. Like I said I've gone this far already and it would be meaningless to not drive a battleship, well I'm still an easy target for the "bigger fish", but at least the other guy is also in my weapons range now so I still have a fighting chance.
If you are interested in Navy Field, here are couple of videos to show you what it's like