The English version of the route guide refers to the compilation of the relevant navigational information that cannot be expressed or fully expressed on the chart, as a supplement to the chart information, to provide the sailors with richer navigation information and navigation experience, which is the safety of the ship. An important reference book for navigation. When reading, you must combine the nautical charts cited in the text, and also refer to the supplements and relevant navigation notices. And the route guide is mainly used by ships with a gross tonnage of more than 150. It compiles relevant nautical information that cannot be expressed or cannot be expressed on the chart. It contains navigation methods and navigation experience. It is equipped with more maps to provide for The sailors have richer navigation information and navigation experience. It can be used as a reference when planning a route or sailing in Xia Waterway. ASD is published according to the sea area, and the volume number is E-NP1-72. A new edition is published every 3 years, and no supplements will be issued during this period.