RedactedNarrative: Operator1 was operating V1 and was making turning maneuvers at approximately 32 miles per hour. V2 was exiting a marina and attempting to head upriver. V2 was at a no wake speed while exiting the marina. V1 made several turns, completing a right handed turn from a position facing upriver and at a distance in close proximity to V2. V1 collided head on into the bow of V2. All three passengers of V1 were ejected. V1 went underneath V2 and became stuck. The three passengers on V1 surfaced, 1 of which was unconscious. An unassociated vessel rescued the three passengers from V1 and transported them to the marina, where medical assistance arrived to provide treatment. V2 became disabled and continued downstream with the river current. V2 was assisted by a second uninvolved vessel and brought into a neighborhood launch ramp at the corner of Colorado Rio Vista and Riverfront roads in Bullhead City, AZ The 2 passengers on V2 were uninjured.