Type 927 oceanographic surveillance ship

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.