system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: "Stealth" Drones. How can a drone be "stealthy" if it must be constantly transmitting data in order to be remotely operated? Isn't radio silence a requirement for stealth in the modern battlefield?
gpt
Radio transmission can be directional.  If you put a directional antenna on a drone and direct it to a satellite it would be close to impossible to detect it from below the drone.  You might have a chance from a aircraft close and above the drone but that is hard to do

Transmission to the drone do not need to be directed to it bout could cover countries or continents and if they are encrypted the would not help in detecting the drone.

I would be easier to intercept if you had electronic intelligence satellite in the correct position in space but they are rare and few countries have any.