How many tonnage ships in China need to install ais?

China Maritime Safety Administration's Regulations on the Equipment Management of Electronic Chart System and Automatic Identification System for Domestic Navigation Ships (Seagoing Ship [20 10] 156) requires that all coastal navigation ships of 200 to 500 gross tons registered in China and self-propelled ships participating in coastal waters and underwater construction operations should be tugboats; All ships with a gross tonnage of 100 or more and oil tankers and container ships with a gross tonnage of 100 or less sailing on the Yangtze River trunk line, the Pearl River trunk line, the Beijing-Hangzhou Canal and the Huangpu River shall be equipped with Class A or Class B AIS equipment that meets the requirements.