Won't the plane get lost in the sky? How can you tell the direction?

Don't talk nonsense The radar on civil aircraft is a weather radar, which is used to detect dangerous weather and also to observe the terrain.

There are many navigation systems on the plane, mainly inertial navigation and radio navigation.

Inertial navigation uses gyroscopes and accelerometers to calculate the current position according to the known position, which is not affected by weather and radio wave interference.

Radio navigation includes ADF, VOR, DME, GPS, radio altimeter, etc.

At present, all kinds of navigation information are summarized by flight management computer to realize automatic navigation. The plane is driven by autopilot. After setting the pre-selected data such as route, destination and airport, the plane can fly along the route and land automatically. The plane can also communicate with the ground by radio, so it won't get lost.