RedactedNarrative: Unit 1 and Unit 2 were traveling in the same direction when Unit 2 stopped to fix a piece of equipment on the boat. The operator of Unit 1 did not see Unit 2 stop. The operator of Unit 1 advised they were following behind Unit 2 at about 20 yards. The operator of Unit 1 attempted to steer away from Unit 2 with negative result. Unit 1 struck Unit 2 from behind. Unit 1 struck the operator of Unit 2 when Unit 1 rode on top of Unit 2. This caused the operator of Unit 2 to sustain injury to their back and ribs. No other people were hurt during the incident. The path of Unit 1 striking Unit 2 could be confirmed by the transfer marks and damaged console on Unit 2.