RedactedNarrative: V1 Operator advised he was entering into the Shiloh Marina cove when his wife pointed out a vessel (V2) approaching from the southeast and appeared to be on a course to collide with them. V1 Passenger advised she stood up and began waving her hands over her head in an attempt to gain the attention of V2. V1 Operator further advised that V2 was not traveling very fast but was in a plowing position with its bow high out of the water. 
  
  V2 Operator stated he was going into the Shiloh Marina cove and had begun to slow down but not enough for the bow to fall. He admitted he kept the throttle at a level to maintain a plowing attitude.   He also stated he did not ever see V1 but he did see V1's passenger's arms waiving and he immediately turned V2 to starboard to try and avoid the collision. However, he was unable to due to his speed and the distance from V1 at this point. A witness advised he noticed V2's operator looking over his right shoulder toward his houseboat when V1's passenger began waving her arms.
   
  Thus, the port bow of V2 struck the starboard stern of V1.  The pitch of V2 resulted in an override of the stern of V1 and caused V1 to slide to its port as well as yaw in a clockwise direction.  V2's heeling to the starboard side was increased upon impact and the angle of yaw changed as a result of deflection off of V1. The deflection of both vessels resulted in the lower unit and prop of V2 to make contact with the starboard pontoon of V1.
  