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|People's Republic of China|
|Name:||China Haijian 52 (CMS 52)|
|Owner:||East China Sea Branch, State Oceanic Administration|
|Operator:||5th Marine Surveillance Fortilla, East China Sea Fleet, China Marine Surveillance|
|Displacement:||2421 t (full load), 726 t (gross)|
|Speed:||14.5 knots (cruise), 16 knots (maximum)|
Haijian 52 (Chinese: 中国海监 52) is a China Marine Surveillance ship in the 5th Marine Surveillance Flotilla of the East China Sea Fleet. Originally christened as "Shijian" (English: practice, Chinese: 实践) and commissioned in 1967 as a comprehensive oceanic survey vessel, Haijian 52 joined CMS, East China Sea Fleet in 2000. It was planned to be inactive in 2007 but her service was extended.