How do you see the stars, the moon and the sun know the coordinates?

Use Polaris to judge the latitude, erect a stick to get the side length, and then use trigonometric function to calculate the elevation of Polaris to get the latitude.

Longitude: You can find it with your watch. You can estimate the sunrise time by the length of a day. The watch is Beijing time, and then the longitude difference can be calculated by the time difference. Without a watch, you can't find the longitude.

Peel off the stick according to the fiber, then twist it into a rope and let the bird fly out with one end. If it can bypass a tree or something, it can climb up the rope.