Flight No. 9 had a very rapid speed. It was hovering above the capital, Donuit City, after only two hours. Moreover, the plane had a powerful directional communications system. Even from a distance of over 2,000 kilometers, it could still maintain a digital communication of 256 kb with the signal tower in the Base of Operations. It could send a high definition image back to the tower every few seconds. Also, it could maintain voice communication with the robots at any time.
The communication quality would rapidly drop to 126 kb and below if the distance between the plane and the signal tower was over 3,000 kilometers. If Chen Jin did not make use of a relay transmitter, it would be difficult to control the plane remotely. He would have to command the robots to operate the plane on their own in their explorations.
