BOTH UNITS WERE GOING FISHING TOGETHER, UNIT 1  WAS FOLLOWING UNIT 2. AS BOTH UNITS WERE COMING UP ON PLANE UNIT 2 OBSERVED ANOTHER BOATER AND BEGAN TO SLOW DOWN. UNIT 1 COULD NOT SEE OVER THE BOW OF HIS VESSEL AND STRUCK UNIT 2 CAUSING THE COLLISION. Someone from V2 was ejected. Operator2 was injured.