 Hiryū , the sole surviving Japanese aircraft carrier , wasted little time in counterattacking . Hiryū 's first attack wave , consisting of 18 D3As and 6 fighter escorts , followed the retreating American aircraft and attacked the first carrier they encountered , Yorktown , hitting her with three bombs , which blew a hole in the deck , snuffed out her boilers , and destroyed one anti @-@ aircraft mount . The damage also forced Admiral Fletcher to move his command staff to the heavy cruiser Astoria . Repair teams were able to temporarily patch the flight deck and restore power to several boilers within an hour , giving her a speed of 19 knots ( 35 km / h ; 22 mph ) and enabling her to resume air operations . Thirteen dive bombers and three escorting fighters were lost in this attack ( two escorting fighters turned back early after they were damaged attacking some of Enterprise 's SBDs returning from their attack on the Japanese carriers ) . 
