RedactedNarrative: On the 5th of September, 2021, Operator 2 was operating a bass-boat (V2) while towing an inoperable EBBTIDE boat (V1) downlake on Lake Powell.  As he came in sight of Antelope Point Marina, just after passing buoy 9, a large Eliminator-style boat (V3) passed him roughly 15 feet off his port-side.  He said the Eliminator boat slowed down and created two large wakes.  He said he waved the Eliminator boat on and it sped up and left but the two large wakes it had created shipped over the side of the vessel 1 and deposited a large amount of water inside it.  Witness, who was in the V1, told him they could keep going and Operator 2 continued on.  
  
  Operator 2 estimated that as they got to within about 300 yards of the east-most breakwater for Antelope Point Marina, a National Park Service vessel (V4) passed them at about 20 feet off their port-side.  He described the vessel as being: aluminum hulled, black stripe with NPS decal, full-sized bumper-collar (like what SAFE Boats have), occupied times 2, operator had long hair, maybe in a ponytail, possibly a female.  (He later identified a picture of NPS Vessel as being that vessel) He said that NPS boat threw up a wake which shipped over the V1 and finished filling it with water.  He said he slowed down and the V1 began to sink.  He hollered for him to speed back up and he did so.  That caused the V1 to remain horizontal with the lake surface until they got to the Antelope Point Marina 3-Dock where they tied the V1 to a cleat.  At that time the V1 began to sink, stern-first, and was submerged completely vertical within about 10 minutes.  Operator 2 estimated the V1 sunk at about 14:20 hours.