RedactedNarrative: On August 28, 2016 Unit 1 was traveling north in the Savannah River with three occupants.  The occupants of Unit 1 were wakeboarding.  The occupants switched out on the wakeboard and attempted to take off.  They realized that the ski rope had become entangled in the propeller.  Two of the occupants attempted to get the rope out while the engine was running.  The two individuals in the water took off their PFD's in an attempt to get close enough to get the rope out of the propeller.  After several minutes the operator noticed the two individuals in the water appear to begin struggling to breathe and maintain consciousness.  The operator assisted with getting the victim to the stern of the boat and out of the water.  As the operator assisted the other individual with getting into the boat the victim slid back into the water and did not resurface.