RedactedNarrative: Both vessels headed westbound from the beach end of the lake.  Vessel #1 headed and on the starboard side of Vessel #2.  Vessel #1 turned to port and did not see Vessel #2 until too late. Vessel #2  hit  Vessel #1 and  knocked both occupants off into the water.  No injuries.  Vessel #2 stopped and assisted Vessel #1, and also towed Vessel #1 to boat launch.  Both operators were not paying attention and both were cooperative and exchanged information.  Vessel #1 had insurance.
NameOfBodyOfWater: Halfmoon Lake
NearestCityTown: Dexter Township               