High Quality Content by WIKIPEDIA articles! The Yuanwang-class are used for tracking and support of satellite and intercontinental ballistic missiles by the People's Liberation Army Navy (PLAN) of the People's Republic of China (PRC). The detailed specifications of the ships are not released by the PLAN. They 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 meters (620 ft). Their propulsion is from one Sulzer Ltd. diesel engine, with a top speed of 20 knots (37 km/h). The class was first proposed by Premier Zhou Enlai in 1965, and the idea was personally approved by Mao Zedong in 1968. The first two ships of the class, Yuanwang 1 and Yuanwang 2 were built at the Jiangnan Shipyard in Shanghai and put to sea on 31 August 1977 and 1 September 1978 respectively. The general designer of this class is Mr. Xu Xueyan. For the first time, this gave the PRC the ability to track launches and satellites that were not over their territory.

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