RedactedNarrative: Vessel 1 docked and was tied to the pier.  Passenger 1 plugged the shore power in. Passenger 1 went below to check if he had power.  He did not. Passenger 1 called passenger 2 down to watch. Passenger 1 went back to adjust the power connection.  As passenger 1 was coming up from below deck he heard a splash.  He checked and his dog was in the water having trouble swimming.  He could not reach the dog so passenger 1 enter the water.  
  
  Passenger 1 was being electrocuted as soon as he entered the water and was paralyzed from the electricity in the water.  Passenger 3 and 4 then entered the water to assist. passenger 1 had made his way away from the boat and yelled electricity.  Passenger 2 unplugged the vessel from shore power. The electricity in the water stopped. Passenger 4 was able to grab the dog and exit the water. Passenger 1 saw passenger 3 was having trouble so he pulled him from the water.  Passenger 3 tried to sit up then started convulsing. Passenger 1 did CPR and then a good Samaritan and EMS took over.
  
  The shore power that was plugged in was 30 amp 120 volt cord and it was plugged into a 50 amp 240 volt receptacle.  This connected the grounding system of the boat to a live circuit.   The entire hull metal was bonded together and when the grounding system became hot the electricity was dispersed into the water.