RedactedNarrative: Unit 1 was heading North up the Saluda River.  Unit 1 reached some shoals in the river and attempted to turn around by going around a tree in the middle of the river.  Unit 1 capsized while attempting the maneuver.  Unit 1 was lodged in the tree and sank in the river.  The operator and both passengers were able to climb in the tree and call 911 for assistance.