RedactedNarrative: Vessel was drifting when deceased jumped off to swim and cool off and began to struggle.  Injured jumped in to assist.  Passenger on board started the vessel to try to pick up the deceased and in doing so struck the male, injuring him. 
  
   Operator's son threw a life jacket to the injured and he was he was able to get back into the vessel.  The son also called 911.  At this point the deceased was still missing.  
  
  MEP utilized side sonar equipment and the body of the deceased with located at 5:35pm in 42 feet of water.  
  
  Owner had just bought vessel, had no experience and vessel was unregistered.  There were not enough PFD's onboard as well as proper sizing for the son who had been wearing a adult PFD until he threw it to the injured.
  
  Owner will be cited for unregistered operation and lack of PFD's.   A cooler was on board with alcoholic beverages. 
  
  Owner will be cited for unregistered operation and lack of PFD's.
  
  It was suspected that all the adults had been drinking and the only confirmed is the deceased.