RedactedNarrative: Unit 1 had just backed out of the dock. Unit 1 started to pull forward and turn. Unit 1 failed to back far enough and pulled up too quickly and over accelerated. Unit 1 then went under the wooden dock, about ¾ the length of the vessel. All passengers were out of the vessel except for passenger 4. Passengers 4, 5, and 6 were transported by squad to Knox Community Hospital and passenger 4 was flown from Knox Community to Columbus.