RedactedNarrative: Operator pulling into Slip of McKinley Marina.  Passenger/Injured standing on the port bow and began to step off with a line to secure the vessel.  Passenger/Injured tripped over something on the edge of the vessel and fell toward the dock.  Passenger/Injured struck his head and right wrist on the dock.  The contact rendered him unconscious in the water.  A witness entered the water as the Injured person’s head went under.  Passenger 2 also entered the water, and the two brought the Passenger/Injured person’s head above the water and maneuvered him to the dock where others assisted with getting him out of the water.