RedactedNarrative: Unit 1 backed up from the dock at Night Harbor.  Unit 1 then throttled forward while turning striking Unit 2 on the port stern side while running over the corner of Unit 4 (dock).  Unit 1 continued across Unit 4 going through it and striking Unit 3 in the bow area and becoming stuck on Unit 3.  Once the boat was stopped, the owner of Unit 1 took over as the operator removing his unit from Unit 3.  Unit 1 left the scene and reported the accident approximately 24hrs later.