China uses unmanned boats for coastal geological survey

China's new-generation offshore fishing ship YUEXIAYU 90215 is seen in Sanya, south China's Hainan Province, Oct. 23, 2017. China has sent two unmanned boats to join a geological survey along its 18,000 km coastline, especially in main coastal zones. Guangzhou Marine Geological Survey has introduced two unmanned boats, developed by Shanghai University, to collect data and take video, which used to be done by surveyors. (Xinhua/Zhang Jiansong)