Pathfinder Whitewater Rafts CLASS I Waves : EASY Fast moving water with riffles and small waves, few obstructions, all obvious and easily missed with little training, risk to swimmers is slight; self-rescue is easy. Great for the whole family. CLASS II Waves : NOVICE Straight forward rapids with wide clear channels which are evident without scouting. Occasional maneuvering may be required; but rocks and medium-sized waves are easily missed by trained paddlers. Swimmers are seldom injured and group assistance while helpful, is seldom needed. Great for the whole family.