China's unmanned weather-observation vessel starts long-duration sail

China's unmanned weather-observation vessel starts long-duration voyage. /CMA Meteorological Observation Center

A China-made unmanned ship for cloud and sea-fog observation has embarked on its first long-duration voyage in the Yellow Sea, covering a distance of 110 nautical miles (about 204 kilometers) so far. 

The vessel sailed from a port in east China's Jiangsu Province, operating con