At 24Controllers, we use a rating system similar to that of VATSIM. Once you have passed the necessary theory exams, you may book a practical exam with one of the examiners where your controlling skills will be assessed. For the S1 Exam, we use a custom made sweatbox to simulate ground traffic. For the S2 Exam, you will be asked the necessary theory questions. Finally, for the S3 Exam, you will control a TMA at IPAP. More info can be found in the discord server.