India has a 7,500-km coastline and a vast ocean territory, but for decades explored little of its depths. The Deep Ocean Mission was approved in 2021 with an outlay of about Rs 4,077 crore over five years, run by the Ministry of Earth Sciences. Its boldest goal: send Indians to the deep-sea floor in an indigenous submersible.
Deep Ocean Mission
Deep Ocean Mission
India's Deep Ocean Mission (approved 2021, ~Rs 4,077 crore) is opening the deep sea the way ISRO opened space. Its centrepiece, the Matsya-6000 submersible, is designed to carry three aquanauts 6,000 metres down. The counter shows the depth the programme is working toward (illustrative).
6,000 m
Matsya-6000 dive depth
Rs 4,077 cr
Mission outlay (2021)
6th
Nation to aim for a deep crewed dive
Crewed dive depth (target)
| Year | Dive depth reached |
|---|---|
| 2021 | 0 m |
| 2022 | 500 m |
| 2023 | 1,200 m |
| 2024 | 3,000 m |
| 2025 | 5,000 m |
| 2026 | 5,500 m |
| 2027 | 6,000 m |
2021
0m
Dive depth reached
20212027
Since 2021
Added
+6,000 m
2021
0 m
2027
6,000 m
Why it matters The deep ocean holds polymetallic nodules rich in cobalt, nickel and rare metals, unique biodiversity, and clues to the climate. Reaching 6,000 m would put India in a club of only a handful of nations, and anchor a sustainable 'blue economy'.
- Matsya-6000, built by NIOT Chennai, will carry three aquanauts to 6,000 m in a titanium sphere.
- In 2025 an Indian became the first to dive to 5,000 m (in a French submersible), a key step.
- The full 6-km crewed dive is targeted for 2027; only the US, Russia, China, France and Japan have done it.
- The mission targets polymetallic nodules and supports India's blue-economy goals.
History
Notable milestone
The mission's flagship is Matsya-6000 (Sanskrit for 'fish'), a crewed submersible built by NIOT Chennai to carry three aquanauts to 6,000 metres inside a titanium sphere. In 2025, an Indian became the first to dive to 5,000 m aboard a French submersible — a key step toward Matsya-6000's own deep dive, targeted for 2027.
How it works
The titanium personnel sphere protects the crew from crushing pressure — over 600 times that at the surface. The submersible carries life support for 12 hours (96 in emergencies), plus sensors, samplers and robotic arms to study the seabed. Sister projects map polymetallic nodules, ocean climate and deep-sea biodiversity.
Outlook
The deep sea is the next resource and science frontier. India holds exploration rights over large areas of the Central Indian Ocean for polymetallic nodules — rock lumps rich in nickel, cobalt, copper and manganese used in batteries. Reaching 6,000 m crewed would put India among only the US, Russia, China, France and Japan.
The road ahead
Deep-sea engineering is unforgiving: pressure-testing the sphere, certifying life support, and running staged dives (shallow first, then deep) all take time — which is why the 6-km dive slipped toward 2027. Turning exploration into responsible, sustainable use — without harming fragile ecosystems — is the longer challenge.
By the numbers
Rs 4,077 crore mission outlay (2021). Matsya-6000 submersible — 3 aquanauts, 6,000 m depth target. 5,000 m dive reached by an Indian in 2025. 2027 target for the full crewed 6-km dive. Sources: Ministry of Earth Sciences, NIOT, PIB.
Source: Ministry of Earth Sciences / NIOT — Samudrayaan & Matsya-6000, 2021→2027. Depth path illustrative.