RedactedNarrative: Unit 1 pulled up to a sandbar and 4 passengers exited the boat into the water.  The wind caused the boat to drift off the sandbar and the 4 passengers swam to the boat.  One swimmer was in distress so three people on the boat jumped in the water to help the swimmer.  
  
  One person made it to the swimmer and lifted them out of the water.  The rescuer then went under the water and never came back up.