An example from Ohio Revised Code on requirements for notifying ODNR. It does state though that it is not for use in liability (last sentence).

"In the case of collision, accident, or other casualty involving a vessel, the operator thereof, if the collision, accident, or other casualty results in loss of life, personal injury requiring medical treatment beyond first aid, or damage to property in excess of five hundred dollars, shall file with the chief of the division of watercraft a full description of the collision, accident, or other casualty on a form prescribed by the chief. The report so filed shall be used for statistical purposes only and shall not be admissible for any purpose in any civil, criminal, or administrative action at law."