If an enemy vessel breaks through the perimeter around a U.S. battleship or other vessel, they turn to their super powered CIWS (Close-in Weapon System): The Phalanx.
This thing is intense! If you are an enemy trying to get cute around a U.S. ship, you better say your prayers.
Check out this bad boy in action!:
Have you operated a CIWS? Share your stories in the comments below!