Both operators stated that they were both out splashing each other with wakes/waves created by their respective vessels passing in close proximity. 

The collison occured when vessel #2 attempted to splash Vessel #1.  Both vessels were traveling north. Vessel #2 was slightly ahead of vessel #1. Vessel #2 turned towards Vessel #1.  On approach, Vessel # 2 turned abruptly in front of Vessel #1.  The sharp turn created a large wake/wave.
The force of the turn stopped forward progress and lowered the rear of vessel 2.   The wave/wake created from the abrupt turn projected Vessel #1 airborne.  Once airborne, vessel #1 was unable to stop or manuevre to avoid the collison.

The collison resulted in serious injuries to the passengers of vessel #2.  Both subject were admitted to hospitals for care.
Springfield                   