RedactedNarrative: Vessel 2 sitting on river facing northbound.  Vessel 1 heading southbound in the direction of Vessel 2.  Occupants of Vessel 2 attempted to wave their arms to warn Vessel 1 it was a slow no wake zone and that they were heading directly toward them.  Vessel 2 had to turn to the east to avoid getting hit, however, Vessel 1 struck the rear portside of the boat causing damage.