How To Use Magnetic Compass Azimuth Circle？

Put on the magnetic compass, you can measure the sun's azimuth, in the passing time, check the sun's azimuth book, measure the deviation. 

Without radar, the ship can also use it to measure the azimuth of other ships, and can also measure the azimuth of two objects to determine the position of the ship. 

It can also be used with no external gyrocompass radar to measure the stern. It can also be used to analyze the situation of ships without ARPA.