RedactedNarrative: Operator of unit 1 reporting beginning docking maneuver when he lost his footing and accidently accelerated, and he was ejected from the unit.  Unit 1 was a tiller steer unit and it was circling striking him multiple times.  
  
  Unit 2 was traveling through the channel and observed the incident and used unit 2 prevent the operator of unit to continue being struck.  Unit 1 did strike the port side of unit 2 and then struck the end of the pier and struck unit 3 on the starboard side. 
  
  The operator of unit 3 had just pulled into the dock when the incident happened and did not yet secure the boat to the dock but assisted in turning off unit 1 once unit 1 struck unit 3.  Operator and passengers on unit 2 assist the operator of unit 1 with the help of another boater to get him on board the unit 2.
  
  Operator of unit was transported to shore and he sustained a significant leg injury to the propeller.  A tourniquet was applied by law enforcement and he was transported via ambulance.
  