This course will help trainees to understand 1) the world's main deep sea diving vehicles, including design parameters, structural characteristics, application fields, etc; 2) the research and development, carrying operation tools, sea test and application of Jiaolong, the first bow deep sea manned submersible in China; 3) the role of "Deep sea No. 1" submersible in deep sea scientific research on the design concept and platform of the ship supporting the master ship.