 Type 646 hydrographic survey ship

Type 646 hydrographic survey ship with NATO reporting name Kanyang (勘洋, meaning Surveying Oceans) class is a type of survey vessel currently in service with the People's Liberation Army Navy (PLAN).Type 646 Kanyang class survey ship is designed by the 4th Directorate 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.