Table 5. Improvement requests.

Improvement requests Case Remarks (case)
Improvement function 6 - The simulation image quality (2)- Difference of the controller’s sensitivity from the actual one (4)
Improvement ease of use 3 - Instructions, Korean terms etc. (3)
Request of additional function 11 - Training for diverse drones (2)- Hovering, ATTI mode, 3rd person mode etc (4)- Vibration, wind effects (1)- Collision detection function (1)- Show different colors for past paths (1)- Show drone flight subline (1)- Controller directional guide output for beginners (1)
Request to adding contents 4 - More reality adding cracks on GB (1)- Check slopes of green area (1)- Floorboard control practice when GPS is poor (1)- Drone control tutorial (1)
Others 3 - Map too wide (2)- Very satisfied (1)
Total 27