RedactedNarrative: From my investigation, and supporting facts, it appears V2 was traveling downriver near the Nevada shoreline when V1 came across the river from near the Arizona shoreline. V1 then began traveling downriver behind V2 when it attempted to overtake V2 by travelling towards the middle of the river. V2 did not see V1 approaching and thus was unable to take effective action to avoid the collision. V1 did not take ample action to overtake V2, causing the port side bow of V1 to impact the starboard side gunwale of V2 above the rub rail near the stern. V1 continued across the starboard side gunwale of V2 for several feet. Fiberglass damage to the starboard side gunwale near the stern of V2 indicates the point of impact from V1, and striations in the gelcoat of the starboard side gunwale indicates the path of travel V1 took across V2.