Chinese navy sends humanitarian ship for int'l mission ZHOUSHAN, June 10 (Xinhua) -- The Chinese People's Liberation Army (PLA) Navy's "Peace Ark," a medical vessel, set off on Monday morning for a "Harmonious Mission" to eight Asian countries and the Gulf of Aden. The 103 doctors and nurses on board the vessel are able to perform more than 30 different types of surgery and treat 130 common diseases. The vessel will take part in multi-national disaster relief and reduction drills as well as cross-border naval medical services. It will also provide medical services to foreign soldiers and officers on patrolling missions in the Gulf of Aden. It is the third time that the "Peace Ark" will go on a "Harmonious Mission." The previous missions were carried out in Asia, Africa and Latin America.