The Impaler had two radar systems: One was the standard radar in the Alliance and the other was the advanced Black Bat radar which Xia Fei had developed. The Black Bat radar currently only had the ability to send out signals. Its other functions, including scanning and probing, had been crippled.
Xia Fei could only rely on the standard radar to navigate the sea of stars, hoping to find a way back.
The standard radar was weaker all-around, and it also had a fatal flaw. It was incapable of sending or receiving signals over extremely long distances. Once it left the range of the interplanetary internet and the military's encrypted network, Xia Fei essentially had no means to establish a connection with the distant Alliance.