RedactedNarrative: Vessel 1 was heading North along shoreline at approximately 20 mph.  Vessel 1 was well within 200' no wake zone.  Vessel 2 and Vessel 3 were floating and pointed South.  Vessel 2 was closer to shore.  They observed Vessel 1 traveling towards them and tried to get their attention.  Vessel 2 and Vessel 3 tried to get out of way by going away from shore.  Vessel 1 on it's port side hit Vessel 2 flipping the kayak over and causing Vessel 2 operator to go into water.  Vessel 2 operator was hit in the head and back by own kayak.