RedactedNarrative: Boat operator had conducted a water taxi route (operates PMG Water Taxi Service out of Bayfield) to north side of Sand Island and dropped people off about 11pm.  Operator heard marine radio traffic about missing kayakers and decided to help on the search between Michigan/Stockton/Madeline Islands on Lake Superior, arriving about 12AM on 8/31/18 and looking for several hours for kayakers.  
  
  Operator remembers it being about 02:30AM and seeing a storm rolling in from the west so decided time to go back towards Bayfield.  Operator remembers standing at console, using right hand on steering wheel, left hand using spotlight to see (said navigation lights were operational) as well to check shoreline for missing kayakers, and the middle window/canvas would have been up and open in full windshield so he could see.  
  Next thing operator remembers is waking up on overturned boat, wading to shore then hunkering down until daylight.  Walks through woods/shoreline area to Quarry Bay where his marine handheld radio floats in to Quarry Bay Beach where he picks it up and calls in to USCG for assistance at approximately 08:15AM.  Warden and RC Warden were in the WDNR LE/V and picked him up at Quarry Bay dock (owned by the National Park Service).  
  NPS Ranger  stated on looking at rocks further at incident site the operator's boat was going in a northerly direction as the bow marks on rock below the surface show about 20-30 yards off the Stockton Island shoreline.  The prop as observed by Warden had all 4 blades destroyed from turning and hitting rocks/objects.  The boat was observed facing north upside down with starboard side against the shoreline rocks before operator was picked up by wardens.  Operator stated he had a radar on board but it was not plugged in as well as for depth and chart use he has to hit a light button to see them at night.  Operator also unsure if his steering might have had problems as he had worked on it the past few days, but admitted to not having any steering problems even in the 2-3' waves earlier in the night when he does have memory of the night.  Boat was not removed until water was calmer on 9/1/18 by Tow Boat US.  Subject had left side pain above eye (contusion) down through left leg.  Operator went in to doctor on 9/3/18 to get checked out and was cleared other than left thigh pain.