“…Deepwater ROV -ROSUB-6000 is being utilized for deep-ocean mineral exploration such as polymetallic manganese nodule at 5289 m water depth, hydrothermal sulfides at 2832 m water depth and gas hydrates at 1019 m water depth ( Fig. 8) (Atmanand et al, 2015;Ramadass et al, 2019).…”