Yuan Wang-class tracking ship

The Yuan Wang-class are a line of Chinese tracking ships used for surveillance and communication of launch vehicle rockets and intercontinental ballistic missiles by the People's Liberation Army Aerospace Force. This class is not of a single ship design, but instead is a group of different designs under the same series that share the same name. The ships are all assigned to the China Maritime Satellite Telemetry and Control Department in Jianyin, Jiangsu province. Detailed specifications for every ship have not been released by the PLASSF. Yuan Wang 1 and Yuan Wang 2 are thought to have a displacement tonnage of around 21,000 tons when fully loaded, with a crew of about 470 and a length of about 190 metres (620 ft). Their propulsion is from one Sulzer diesel engine, with a top speed of 20 knots (37 km/h).