How to use Polaris to evaluate

1, open the compass first, and you can find the sight and the door immediately. The width of the tips on both sides of the quasi-constellation is exactly one tenth of the distance from the quasi-constellation to the light gate.

2. Secondly, when measuring the distance, put the compass flat, observe the target through the door and sight with your right eye, and remember the width of the light spot with the distance estimator.

3. Finally, visually inspect the width of the site and multiply it by 10, which is the distance to the target.