RedactedNarrative: V1 WAS UNDERWAY NORTH OF KEY WEST NAVIGATING WITH A GPS ROUTE TO CALDA CHANNEL.  WHILE IN ROUTE AND PASSING THROUGH A RAIN SHOWER THE V1 OPERATOR PUT DOWN THE FLY BRIDGE CURTAINS.  UPON CLEARING THE SHOWER THE V1 OPERATOR RAISED THE CURTAINS AND LOOKED DOWN AT THE GPS SCREEN.  THE OPERATOR SAW V1 WAS OFF THE ROUTE AND BEGAN MAKING A TURN TO GET BACK ON THE ROUTE.  V1 LOOKED UP AND SAW V2 IMMEDIATELY OFF THE BOW OF V1.  V1 MADE A TURN BUT STRUCK V2'S  STERN AND TWO OF THE SIX OCCUPANTS THAT HAD JUMPED OVERBOARD. 
  Injured victim has bleeding to both sides of brain and contusions to both lungs.; deceased victim was struck by the propeller of V1.