| Summary: | The South China Sea is the sea area with the largest area, the largest depth, the most abundant oil and gas resources and the most comprehensive biological species in China. The further exploration of the South China Sea with manned submersible and other major deep-sea equipment is of great significance to China's deep-sea scientific investigation. In this paper, Jiaolong manned submersible was taken as an example. In order to explore the operation window to guarantee the operation safety of manned submersible and improve the efficiency of voyage scientific investigation, this paper combined the global wave return data and the wave data based on satellite remote sensing to focus on the Marine environment characteristics in the South China Sea. According to the operational design parameters of Jiaolong, in the South China Sea, the most appropriate operating time window is from April to September, and the rest of the time, proper sea conditions should be selected for the operation.
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