Seek appropriate medical attention immediately. If you are unable to use your cell phone, look for passengers around you, or look to the operator of the boat for assistance. In almost all instances, boating accidents will be affecting passengers other than yourself as well, so first and foremost, follow the directions being broadcast and remain calm.
Make sure to give the doctor accurate information about your injury and the events surrounding it; these documents will be useful should you choose to pursue options in court, as they can be used as proof of injury. If at all possible, you should attempt to capture photos or video of the time and location of your injury, and you should examine the area for witnesses and/or other victims and try to gauge their reactions as well.
This will be helpful for your attorney to argue that your settlement must match the gravity of the injuries you have suffered. The more tangible evidence of negligence or wrongdoing that you can produce, the better case an attorney can make for the worth of your legal claim.
In order to file a report of the accident, contact your local sheriff, police department, or governmental department in charge of fishing and wildlife in your state. The police will conduct an investigation to determine negligence and/or wrongdoing that might have resulted in the accident.