India's Deep Ocean Mission has completed its first phase with the successful shallow-water trials of the "Matsya 6000" submersible vessel, bringing the country closer to becoming only the sixth nation — after the US, Russia, France, Japan, and China — capable of sending humans to the deep ocean floor at depths exceeding 6,000 metres.

The National Institute of Ocean Technology, which is developing Matsya 6000, confirmed that the vehicle's pressure hull, life support systems, and propulsion have been validated to 750-metre depth. Full-depth certification testing in the Bay of Bengal is scheduled for October 2026.

The mission's scientific focus extends beyond the deep sea vehicle: it includes a comprehensive survey of India's Exclusive Economic Zone for polymetallic nodule deposits — seafloor mineral concretions containing manganese, nickel, copper, and cobalt — that could supplement India's imported mineral supply for battery and electronics manufacturing.

Hydrothermal vent ecosystems, which exist where hot mineral-rich water rises from the Earth's crust to the ocean floor, are another research target. These environments host unique chemosynthetic ecosystems and potentially novel biological compounds with pharmaceutical or industrial applications.