RedactedNarrative: Unit 1 was traveling south in the middle of the channel and Unit 2 was traveling in the opposite direction. Suddenly and without warning, Unit 2 turned right and struck Unit 1 on the starboard side. The operator of Unit 1 suffered a compound fracture of the right arm, tendon and ligament damage of the right wrist, and two broken fingers on the right hand. Unit 1 operator underwent surgery three days later.  Unit 2 kept going and failed to render aid or report the accident.