Largest patrol vessel in S China Sea en route to rescue mission (2/5)

A helicopter is examined on the deck of China's patrol vessel "Haixun 31" before departing from the port in Sanya, south China's island of Hainan Province, March 9, 2014. "Haixun 31", the largest patrol vessel in South China Sea, left here on Sunday afternoon for search and rescue mission for the missing Malaysian Airline flight. (Xinhua/Zhang Yongfeng)