The Deep Ocean Mission and Samudrayaan

India has sent people into space. It hasn’t yet sent anyone to the bottom of the ocean. The Deep Ocean Mission aims to fix that, building a submersible that can carry three people 6,000 metres underwater. This article covers the mission, its Samudrayaan submersible programme, and what it’s built to find.

📑 Contents

1Timeline
2Must Know
3Good to Know
4Test Yourself
5Great to Know
6Current Affairs

Timeline

June 2021 — The Union Cabinet approves the Deep Ocean Mission, with an outlay of ₹4,077 crore over five years.
September 2021 — The Ministry of Earth Sciences formally launches the mission.
February 2025 — Matsya 6000, India’s indigenous manned submersible, completes wet trials at L&T Shipyard in Tamil Nadu.
2026 — Shallow-water trials of Matsya 6000 are planned, ahead of full deep-sea manned dives targeted for 2027-28.

🌊 About the Deep Ocean Mission

1. The Basics

Approval The Union Cabinet approved the Deep Ocean Mission in June 2021, with an outlay of ₹4,077 crore over five years.
Nodal Ministry Its nodal ministry is the Ministry of Earth Sciences (MoES).
Six Components The mission has six components: the Samudrayaan manned submersible, deep-sea biodiversity exploration, polymetallic nodule mining, ocean climate advisory services, a marine station for ocean biology, and advanced ocean observation systems.
Matsya 6000 Matsya 6000 is India’s indigenous, fourth-generation manned submersible. NIOT, in Chennai, built it. It can carry three people to a depth of 6,000 metres.
Milestone Once Matsya 6000 completes a manned deep dive, India becomes only the sixth country to run a crewed deep-sea mission. The other five are the US, Russia, Japan, France, and China.

Asked as: “Which of the following statements with regard to India’s Deep Ocean Mission is/are correct? 1. It was launched by the Ministry of Ports, Shipping and Waterways, Government of India. 2. Matsya-6000 has been designed to carry 3 people for deep sea exploration. 3. Samudrayaan is a project under this mission.” (UPSC CSP 2026, GS Paper I). Answer: 2 and 3 only — statement 1 is wrong, since the mission’s real nodal ministry is the Ministry of Earth Sciences, not Ports, Shipping and Waterways.

⚓ Submersible and Mining Details

1. Matsya 6000’s Specs

Endurance Matsya 6000 has an operational endurance of 12 hours. Its emergency endurance is 96 hours, for use if something goes wrong at depth.
Trials Wet trials at L&T Shipyard in February 2025 tested the submersible’s systems in water, ahead of the deeper, riskier trials still to come.

2. Deep-Sea Mining

Target The mining component targets polymetallic nodules in the Central Indian Ocean Basin, at depths around 5,500 metres. These nodules contain manganese, nickel, copper, and cobalt.
Strategy The mission supports India’s Blue Economy strategy. It also aligns with UN Sustainable Development Goal 14, Life Below Water.

Test Yourself

🌐 The Bigger Picture

1. Strategic Stakes and Wider Context

Strategic Minerals Manganese, nickel, copper, and cobalt are critical inputs for batteries and electric vehicles. Deep-sea mining is partly a bet on securing these minerals without relying entirely on land-based supply chains controlled by other countries.
Contested Deep-sea mining remains contested internationally. The International Seabed Authority regulates mining in international waters, and marine scientists warn large-scale extraction could damage poorly-understood deep-ocean ecosystems.
Frontier Missions The Deep Ocean Mission sits alongside other frontier-technology missions India launched in the same broad window, including the National Quantum Mission and the IndiaAI Mission.
Cautious Pace Progress here has been incremental, not dramatic. Successive stages test one at a time: wet trials, then shallow trials, then full-depth manned dives — a caution that exists because a human crew will be on board once real dives begin.

🌊 Current Affairs

1. Recent Developments

Verticals 5 Aug 2026: A Lok Sabha reply reaffirmed the mission’s six verticals: deep-sea mining tech/submersible/robotics; ocean climate advisory; biodiversity exploration; deep-ocean survey; ocean energy and freshwater; and an Advanced Marine Station for Ocean Biology. (Source: PIB)
Progress Jan-Feb 2025: The same reply confirmed Matsya 6000’s design and system engineering are complete, with subsystems realised. Wet tests ran at L&T’s harbour facility in Katupalli, near Chennai. (Source: PIB)
Earlier Milestone Dec 2022: OMe 6000 (Ocean Mineral Explorer), an autonomous underwater vehicle, explored mineral-rich zones at 5,271 metres depth, in the Central Indian Ocean Basin’s Polymetallic Manganese Nodule (PMN) zone. (Source: PIB)

📝 Previous Year Questions

Who Actually Licenses Seabed Mining?

Not the Global Ocean Commission It’s the International Seabed Authority (ISA), a UN body, that grants seabed exploration and mining licences in international waters.
India’s licence India holds ISA licences for polymetallic nodule exploration in the Central Indian Ocean Basin, first granted in 2002 and extended since.
Rare earths present Rare earth elements do occur in seafloor nodules and crusts in international waters.
Answer: (b) Statements 2 and 3 only.
View this question on the full 2021 paper →