The navigation table in the nautical chart is a kind of bibliography to help ships navigate. According to the query information, these tables provide calculation methods and formulas of astronomical and geomagnetic azimuth, time, distance, speed and other important information, which is very important for accurate navigation. Navigation tables include various types of tables, such as ephemeris, sunrise and sunset tables, moon rising and setting tables, declination and declination tables, time, distance and speed tables, etc. These forms are usually compiled and updated by the International Maritime Organization (IMO) or other similar institutions according to global navigation standards.