RedactedNarrative: Vessel-1 was just north of the dam on Broken Bow Lake when a storm came in with high winds.  The wind caused the waves to become very large so vessel-1 decided to go back to the marina where they rented the boat.  Due to the driver's inexperience of driving a vessel, he did not go fast enough to get the bow of the vessel up and they went through a wave partially filling up vessel-1.  Vessel-1 then went through a second wave that filled it up with water and it began to sink.  
  
  The occupants released the tube that they had been towing and all occupants exited the vessel.  The occupants were sitting on and hanging onto the tube as the vessel sunk.  They called the marina for help and when the marina personnel got there they retrieved the passengers out of the water.  
  
  
  At that time only a small portion of the bow was all that was sticking out of the water.  After taking the occupants to safety, the marina personnel returned to find the vessel had totally sunk. The water depth is 140 ft. where the vessel sank so the vessel is still in the lake. Area of the accident is approximately 1360 feet north of the dam and approximately 7156 feet east of the spillway and approximately 10167 feet east of Beaver's Bend Marina.