In late 42 or early 43 you will be offered a Gato class. The 6 bow tubes make for fun when you find a Carrier or Battleship. Also make sure you have manged your crew in port. Give them the medals and what many new players fail to do is to add crewmenber to the damage control section. They also have a few crew members in slots where they should not be, particularly a Gunner in the aft torpedo room. Exchange him with another crew member and put the Cheif on the Aircraft gun.
