Information about Apply to become a radio operator Read about Aeronautical Radio Operators Certificates (AROCs). What it is, who needs one, and how to apply for one. Apply to provide AROC training and assessment Read about how to become a training organisation for aeronautical radio operator certification courses. Show more Show less Also see General English language proficiency Learn about the English language standards (GELP) you must meet to use an aeronautical radio. Authority to taxi an aeroplane Learn about the rules for taxiing aeroplanes, for students, examiners and pilots. Show more Show less