Operator report only - We were traveling out to our fishing spot in 3-4 ft waves when we hit a temporary buoy for the air show that was just placed in the water the day before.  

The buoy was made up of 2 clear 55 gallon drums ratcheted tie strapped together and anchored to the bottom.  It didn't have any lights or reflective tape and in the waves it was mainly covered by water.  The boat went right over the top of the buoy causing the damage, no one was injured.
Lake Michigan
Milwaukee                     