Bangkok Post - China plans to expand "manta ray" submersible

China is expanding its fleet of coral-monitoring submersibles and plans to build larger models that could also be used for reconnaissance purposes.

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South China Sea , Brunei General , Brunei , China , United States , Beidou , Anhui , Zhao Yiwei , Cao Yong , Us Defence Advanced Research Projects Agency , Northrop Grumman , Northwestern Polytechnical University , Advanced Research Projects Agency ,