RedactedNarrative: Operator1 was the operator of vessel 1. Operator1 reported tipping over up river from the Riverside Resort North Dock. Operator1 had trouble re-boarding vessel 1. Subject attempted to assist Operator1 and entered the water himself. Vessel 1 drifted past the North end of the Riverside Resort North Dock towards the East side, away from the shore. 
  
  Vessel 2, a water taxi, was docked to the Riverside Resort North Dock. Prior to the collision, the operator of vessel 2, Operator2, was facing towards the stern of V2, facing the persons on board V2, from the captains area. Vessel 2 was docked against the Riverside Resort North Dock by using engine power and directional control. Vessel 2 was not tied off. Prior to the collision, I witnessed V2 sitting still along the side of the dock. It was not moving forward, nor rearward.
  
       With Subject''s assistance, Operator1 swam away from and floated past vessel 2, continuing downriver. Subject and his un-involved PWC became stuck to the Riverside Resort North Dock. 
  
       Vessel 1 struck the bow of vessel 2 and became stuck against the front of vessel 2. Operator2 immediately turned around and vessel 2 began drifting downriver following the collision. Operator2 later stated that he immediately placed vessel 2 into neutral when the collision occurred. Operator2 did this in case a person had gone under vessel 2 and was headed towards the props with the river current.
  
       Subject self rescued and was able to operate his un-involved PWC away from the Riverside Resort North Dock. 
  
       Vessel 1 was pinned to the front of vessel 2. However, vessel 2 was drifting with the current at this time and was nearing very close to the USS Riverside, a large vessel docked to the Riverside Resort South Dock. Due to this, Operator2 placed vessel 2 in forward gear and vessel 1 went under vessel 2''s starboard pontoon. Operator2 continued forward and vessel 1 bounced underneath vessel 2''s starboard pontoon, continuing out the rear of vessel 2, striking vessel 2''s starboard engine before surfacing.