RedactedNarrative: Vessel #1 was proceeding north/northeast up the river and vessel #2 heading southwest produced a large wake.  As the wake travelled over toward vessel #1 operator turned into the wake at a 75 degree angle in an effort to minimize the disruption.  The vessel came down hard at least 3x.  Injured was airborne prior to the 3rd wave and became injured after coming down.  Neither operator or injured on vessel #1 could provided a detailed discription of the vessel which caused the wake only that it was a cabin type vessel with 4 male parties aboard. Officer determined that most likely than not the operator of the cabin type vessel would be held responsible for the wake that caused this injury.