2016 – Haidou-1 On 23 May 2016, the Chinese submersible Haidou-1 dived to a depth of at an undisclosed position in the Mariana Trench, making China the third country after Japan (ROV Kaikō), and the US (HROV Nereus), to deploy a full-ocean-depth ROV. This autonomous and remotely operated vehicle has a design depth of .
2016 – Haidou-1 On 23 May 2016, the Chinese submersible Haidou-1 dived to a depth of at an undisclosed position in the Mariana Trench making China the third country after Japan (ROV Kaikō), and the US (HROV Nereus), to deploy a full-ocean-depth ROV. This autonomous and remotely operated vehicle has a design depth of .