Discovery (Fa-xian, 发现 in Chinese) remotely operated underwater vehicle (ROUV) is a type of very little known unmanned underwater vehicle (UUV) originally built in Great Britain by British firm Specialist Machine Development (SMD) Limited for the People's Republic of China (PRC).

[1][2][3][4][5][6][7][8] and the British firm was later purchased by CSR Corporation Limited in April 2015.

[9] In order to complete its assigned missions, Discovery ROUV is equipped with seven underwater cameras, two high definition cameras, underwater positioning system, one Titan 4 and one Atlas manipulators,[2][6] each is capable of handling objects weighing up to 120 kg,[2] and when used together, objects weighing up to 300 kg can be handled.

[6] In addition, there are more than thirty different kinds of scientific instruments and equipment indigenously developed in China for the ROUV after it entered service.

[7] It's reported that during this maintenance/upgrade, by incorporating more advanced technologies, the maximum operating depth is increased by a third, to the original 4,500 meters to 6,000 meter after Discovery ROV returned to service.