 Type 636 hydrographic survey ship

The Type 636 and its successor Type 636A hydrographic survey ships are Chinese survey vessels currently in service with the People's Liberation Army Navy and Chinese Coast Guard.Type 636 hydrographic survey ship and its successor Type 636A are both designed by of the 708th Institute of China State Shipbuilding Corporation (CSSC), which is also more commonly known as China Shipbuilding and Oceanic Engineering Design Academy (中国船舶及海洋工程设计研究) nowadays.