You should check if anyone requires medical attention. Make sure everyone are equipped with a life jacket or a PFD to guarantee their safety.
Federal law states that if you are involved in a boating accident that includes injury requiring medical treatment, death, disappearance of a person, or property damage, you are required to stop, identify yourself and your boat, and give help as needed. You should contact the responsible local law enforcement agency. Additionally, you are required to file an accident report with the state boating authority.
Boating accidents include; capsizing, crew overboard, collisions, fire, sinking & flooding, explosions and disappearance.
Failure to provide assistance or identify yourself when involved in an accident is a serious offense and can carry a severe fine or even imprisonment.