I still don’t understand. Could you please explain it in more detail? What kind of thing is better for measuring distance and what are the plates? Thank you.

There is a small map in the upper right corner of the screen, with a small white box inside (this is the section). The distance between a small white box on the small map is one screen (the width of one screen, that is, 10 distance) You can roughly see how much distance there is. If you want to see the precise distance, just look at it on the big screen. Similarly, the entire screen is divided into 10 equal parts, and one part is one distance. If the entire screen is divided into 10 equal parts, how can you calculate it? If you are not sure, I can give you a little trick. The wind direction indicator at the middle top of the screen is right in the center of the screen. You can look at half of the screen at a time and divide it into 5 parts (i.e. 5 distances). I hope my answer can help. I’ll help you. If you don’t understand anything, you can continue to ask.