On 6-18-13 at approximately 1712 hours, operator1 and operator2 were participating in a bass tournament at witmer lake in separate boats.  Operator2 was operating his boat behind operator1's boat and travelling in the same direction toward the channel leading to westler lake. Operator1 throttled down his boat before entering the idle zone when he and his passenger heard operator2 yell out to them.  Operator1 and V1 occupant turned around to see operator2's boat strike the starboard stern of their boat, and ramp up over operator1, striking him in the head.  Operator2's boat landed on the operator1's steering console windshield, and then glanced to the starboard side entering back into the water.
Operator1 received a bump to his head and did not request ems.  He did see his family doctor the next day for complaints of a headache and soreness in his shoulders and back.  His passenger was not injured.
operator2 and passenger hunter operator2 were not injured.
Operator1's boat received damage near the motor causing steering problems after the accident.  This was the initial impact area.  The console windshield was crushed and there were several scuffs and gouges along the path of engagement.
Operator2's boat received several scuffs and gouges on the bottom of the port side hull.
Both operators stated that the water conditions were very rough in that area due to the other boats participating in the bass tournament.
Operator2 stated that he observed operator1 slow down, but he could not slow his boat down quick enough to avoid the accident.  He stated the rough water conditions also contributed to forcing his boat in the direction of operator1's boat.
Operator2 was issued a written warning for imprudent operation of a motorboat.
Wolcottville