Type 927 acoustic surveillance ship is a type of vessel used by the People’s Liberation Army Navy. There are three known Type 927 ships, plus one predecessor Ruili No.10, which is slightly larger than Type 927 ships, and it was used to test onboard systems such as sonars for the three Type 927 ships. The first Type 927 ship was launched around June 2017 in Guangzhou. Type 927 has received NATO reporting name Dongjian class, 东监 in Chinese, meaning East Surveillance, because the West first observed it performing acoustic surveillance missions in East China Sea.
Characteristics Type 927 vessels are twin-hulled, with a displacement of approximately 5,000 tonnes. The ships are 90 meters long and have a beam of 30 meters.
Construction The first photos of a Type 927 under construction surfaced in 2017. Two Type 927s were constructed in Huangpu District, Guangzhou, and the third was constructed at the Wuchang Shuangliu shipyard in Wuhan.
Ships As of end of 2021, there are a total of four ships, including the predecessor unit: Type NATO designation Pennant No. Name(English) Name(Han 中文) Commissioned Displacement Fleet Status Ruili No. 10 oceanographic surveillance ship ? Rui-Li 10 Rui-Li 10瑞利十号 2016 5300 t All fleets Active Type 927 oceanographic surveillance ship (AGOS) ? 780 Beta Ursae Majoris天璇星 2018 5000 t South Sea Fleet Active 781 Gamma Ursae Majoris天玑星 2019 5000 t South Sea Fleet Active 782 Eta Ursae Majoris瑶光星 2019 5000 t South Sea Fleet Active
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