Ohio law (ORC 1547.10) requires boaters to do several things following a boating accident:
Stop immediately if it is safe to do so; do not leave the scene of the accident
Provide the other boater with your contact information and the contact information of the boat owner, as well as the boat's registration number
If the other party involved in the accident is unable to take down the information themselves you are required to call law enforcement and remain at the scene until they arrive
If the boat was unoccupied at the time of the accident you are still required to leave contact information attached to the vessel in a visible place
If you are witness to or are involved in a boating accident in Ohio, you are also required to render assistance to the other vessel following the accident if at all possible. You can read more about this in ORC 1547.59.