RedactedNarrative: After reviewing statements from the passenger and operator and observing the evidence at hand, it is believed by the investigator that the following occurred. Vessel 1 was being operated upstream by Operator. Operator was operating his vessel on the correct side of the waterway (right of mid-channel) when all of a sudden the vessel veered sharply to the starboard side. Operator attempted to correct steering but was unable due to a mechanical/equipment malfunction. Operator attempted to slow the vessel by putting throttle into neutral position before vessel collided with cypress trees and knees along the shoreline. Neither Operator nor his passenger were wearing PFD's at the time of the incident. No injuries were reported but the vessel suffered rather significant damage. Alcohol was not suspected to be a factor in this incident. No violations were found.