This property activates the ability of Battleships to survive 1 hit. If the Battleships repair at end of round property is true, the hit will be repaired.
This rule is official in all versions except AAC. However it makes battleships unrealistically tough, as during WW2, battleships were quite vulnerable to aircraft. AA50 retains the rule but introduces cruisers and reduces carrier costs, bringing battleships back into line with other ships.. AAG40 retains 2-hit battleships, but repair can only occur a friendly naval bases.