Seoul Metro Line 9 operates FTS (Full Type Simulator), a full-function simulator, as well as PTS (Personal Type Simulator) and CAI (Computer Assisted Instruction) to improve the skills of operators drivers. CAI is an online learning system with which operators drivers can learn about the railway system and troubleshooting. We also have instructor’s control seat that has access to both FTS and PTS and trainee lounge where trainees can watch FTS training in real-time.