You can get this license at 10 years old. 10-11-year-old operators can solo on a boat if the motor is less than 10 horsepower. 10-11-year-old operators can take the helm, steer and operate the throttle, but must be accompanied by an adult who is 18 or older and has had a license for at least two years. An individual with the license who is 12 years old my solo on a boat.