RedactedNarrative: Vessel 1 was traveling N. Bound on Lake Texoma around the entrance of Willow Springs area and was struck by Vessel 2 which was traveling southeast.  POI was approx. .2 mi. S.W. of Willow Springs boat ramp and .7 mi. N. of the railroad bridge main span.  POR was same as POI.  Vessel 1 sustained major damage (a large hole) to the portside stern but was able to get back to Alberta Creek boat ramp.  
  
  Vessel 2 operator stated that he did not see any lights on Vessel 1.  Vessel 2 operator also stated that he looked down at his GPS briefly to get his bearing and when he looked up all that he saw was the light from vessel 1's GPS and at that time it was too late to take action and he struck vessel 1. 
  
  I inspected vessel 2 at the Catfish Bay boat ramp and found that Vessel 2's lights were functioning correctly and Vessel 2 operator had a video after the accident occurred showing that his lights were on and showing that the white light on vessel 1 was not on.  
  
  I met with operator of Vessel 1 at the Alberta Creek boat ramp approx. 2 1/2 hours after the accident occurred.  Operator of Vessel 1 stated that the front red/green light was on and the white light that was mounted on the canopy was on.  He also stated that the white light on the stern of the vessel was not on.  
  
  I inspected Vessel 1 and found that the white light mounted on the canopy did not turn on (the light that was supposed to be on).  The stern white light turned on but operator stated that it was not on and in the video I could clearly see that there was no white light on.  I inspected the Red/Green light on Vessel 1 and found it to be functional but was suspicious of the light. The light was a small battery operated light that was on a mountable pole that could easily be taken off and put back on.  
  
  In the Video that Vessel 2 operator had I was unable to tell if the Red/Green light was on for Vessel 1 since the video was taken from the Stern of Vessel 1 and the Red/Green light was mounted to the Canopy top projecting forward.  It didn't appear to have a light on but I could not be completely sure in my findings.