Chennai/New Delhi: India is making significant strides in its first human deep-sea mission with the development of Matsya6000, the country’s first indigenously developed human deep-sea submersible, Union Minister Jitendra Singh announced on Tuesday. Speaking on social media, he described the project as an ambitious effort running parallel to India’s preparations for sending a human into space.
Showcased at IISF 2025, Matsya6000 is being developed under the Samudrayan Project, part of the Government of India’s Deep Ocean Mission. The project, led by the National Institute of Ocean Technology (NIOT) under the Ministry of Earth Sciences, aims for a 500-metre manned dive by 2026 and a 6,000-metre ultra-deep dive by 2027, which would position India among a select group of nations capable of deep-sea exploration at such depths.
Design and Development
The fourth-generation submersible is designed to house three people inside a 2.1-metre-diameter spherical hull, enabling scientific operations in the deep ocean. Key subsystems developed for the project include main ballast systems, multi-directional thrusters, syntactic foam for buoyancy, a battery power bank, and distributed power and control networks.
Harbour Trials Validate Systems
Matsya6000 underwent integrated dry tests and wet trials at the L&T Shipbuilding facility in Kattupalli Port near Chennai from 27 January to 12 February 2025. Testing included eight dives, comprising both manned and unmanned operations, to evaluate buoyancy, vehicle stability, maneuverability, navigation, communication, and human-support systems.
The trials successfully demonstrated the functionality of the submersible’s scientific payload, including oceanographic sensors, and validated life-support systems during manned dives. While some limitations were noted in underwater voice communication, further trials at greater depths are planned to address these.
Next Steps
Following the successful harbour demonstrations, Matsya6000 is slated for shallow water dives up to 500 metres by the end of 2025, marking a key milestone before attempting deeper explorations. The project underscores India’s growing capability in deep-sea scientific research and technological innovation, complementing its space exploration initiatives.