RedactedNarrative: V1 was traveling North bound on the Colorado River on the Arizona side.  V2 was traveling South bound offset slightly to the West of V2's path.  As the vessels approached each other both operators turned to their port direction.  The bow of V1 struck the starboard side of V2, traveled over V2 and damaged the seat area of V2.  Both operators and passenger of V1 were ejected into the water.