RedactedNarrative: On 07-04-2019 at approximately 1700 hours Vessel 1 (V1), a 25' Tracker Pontoon, pulled into the Midway Bay on Lewis and Clark Lake in Yankton County, SD. V1 was operated by Operator 1 (O1) at this time with six other occupants on board. O1 intended to pull V1 up to the boat dock but several other vessels were in line ahead of V1. O1 positioned V1 facing northeast, waiting in line to access the dock. Moderate wind and waves from the south pushed V1 closer to shore. O1 maintained V1's position in the bay by momentarily using neutral and reverse gear with the wind and waves. 
  
  As V1 remained in the bay, Vessel 2 (V2), a 23' Avalon Pontoon, approached from the rear of V1 while being operated by Operator 2 (O2). No occupants on V1 reported being aware V2 was approaching. V1 Passenger 1 (V1P1) stood next to the helm of V1 at this time. V2 attempted to overtake V1 on V1's port side. O2 turned V2 to it's port side while attempting to overtake V1. O2 failed to leave enough distance between V2 and V1 during the turn. O2 increased speed during the turn to avoid collision. The rear of V2's starboard side pontoon swung toward V1 while turning, impacting a glancing blow to the rear of V1's port side pontoon. Occupants on board V1 were aware of V2's presence upon initial impact between the vessels. V1P1 stumbled backward during the collision but did not completely lose balance. V2 continued moving past V1 after the collision. After the collision, O2 motored V2 back to V1 to make contact with the occupants.
  
  Both vessels were trailered after the collision. V1 suffered a dent and gouges near the rear of it's port side pontoon. In addition to dents and gouges, V2 suffered a puncture in the rear of it's starboard side pontoon. The location and characteristics of V1's damage were consistent with the glancing blow described by V2. Portions of aluminum on V1's pontoon were laid over in a forward direction, indicating the force causing such was moving forward from the rear of V1 toward the front. The location and characteristics of V2's damage were consistent with the glancing blow described that it delivered to V1. The location of the sharp aluminum puncture on V2's pontoon was consistent with the location of the gouged and laid over aluminum on V1. The level of damage on both vessels indicates the collision occurred with a moderate amount of force.
  
  After the collision, O2 stated that V2 impacted a rock earlier in the day prior to the collision. A piece of V2's lower skeg broke off during that collision. O2 stated that V2 did not steer correctly after the lower skeg was damaged, including at the time of collision with V1.
  
  After analyzing witness interviews, weather conditions and damage it was determined that O2 failed to yield V2 while overtaking V1, resulting in the collision.
  