RedactedNarrative: Location was never able to be pinpointed to anything better than Lake Poygan.  Vessel 1 Operator struck rock bed in the dark and said he was airborne momentarily.  Rock piles are suspected in the Captain’s Cove area or the break wall near the natural exit of the Wolf River into Lake Poygan.  Vessel 1 Operator reports being able to still partially navigate and attempted to get back to Oshkosh when he ran out of gas.  Operator stated he got the vessel to the shore in the 9100 block of County Road and walked to Winneconne.