RedactedNarrative: V1 was traveling down river on the Escambia River.  In this area, the river is narrow and shallow.  O1 was standing on a rear deck that was constructed on the back of V1.  O1 was operating at idle speed, holding the extended tiller handle of the outboard motor.  
  
  V1 struck a submerged log causing O1 to loose his balance and fall into the river due to no support structure above the deck.  As O1 fell, he pushed the tiller handle to the port side and rotated the throttle to a faster speed before loosing his grip on it.  
  
  He was not wearing the kill switch lanyard.  As a result, V1 turned to the right and circled around towards O1 as he tried to swim out of the way of V1.  O1 was unable to leave the path of V1, and turned to try and fend it off.  V1 struck O1 with the propeller along his right hand and wrist causing severe lacerations to his hand and wrist.  V1's passenger finally reached the kill switch and stopped V1. The propeller also broke one metacarpal.