A unitAttatchment. XML format is: The default value is false. Upon initialization, the engine will set this option to true if the Two hit battleship property is set to true. It is required that the Two hit battleship game property be present in the games xml for isTwoHit to function. It gives any unit with the attachment the ability to survive 1 hit. If a can be damaged, then you will need to have a "_hit" verison of the unit art in the players units folder. The hit can be repaired by using either the Battleships repair at end of round or Battleships repair at beginning of round game properties.