Deep Ocean Mission (Samudrayaan)

The Deep Ocean Mission (DOM) is a high-priority, multi-institutional, central sector mission-mode initiative under the Ministry of Earth Sciences (MoES). It functions as a core scientific pillar supporting India’s Blue Economy Policy. It is recognized as one of the nine national missions approved under the Prime Minister’s Science, Technology, and Innovation Advisory Council (PM-STIAC).

Budgetary Framework and Timeline

The mission is executed across two distinct phases covering a multi-year horizon. The total approved fiscal outlay stands at Rs. 4,077 crore. The Union Budget allocated Rs. 600 crore specifically to advance the deep ocean exploration and submersible deployment mandates.

Key Executing Agencies

• National Institute of Ocean Technology (NIOT), Chennai: An autonomous body under MoES responsible for designing the human-occupied submersible, deep-sea mining systems, and underwater robotics.
• Indian National Centre for Ocean Information Services (INCOIS), Hyderabad: Tasked with maintaining operational deep-ocean observation networks and generating multi-hazard vulnerability projections.
• Centre for Marine Living Resources and Ecology (CMLRE), Kochi: Spearheads the inventorization, taxonomic archiving, and genetic profiling of deep-sea marine biodiversity.
• National Centre for Polar and Ocean Research (NCPOR), Goa: Manages hydrothermal vent mapping and structural geophysical surveys across mid-oceanic ridges.
• Isro’s Vikram Sarabhai Space Centre (VSSC) & Liquid Propulsion Systems Centre (LPSC): Collaborators handling the specialized fabrication and non-destructive testing of the crewed sphere.

The Six Core Verticals of Deep Ocean Mission

1. Deep Sea Mining and Manned Submersible (Project Samudrayaan)

Development of an indigenous, human-occupied deep-sea submersible capable of transporting three researchers safely to an ocean depth of 6,000 meters. This vertical also includes building an integrated mining system for harvesting Polymetallic Nodules from the Central Indian Ocean Basin floor.

2. Ocean Climate Change Advisory Services

Developing a suite of interactive, GIS-based coastal vulnerability mapping models. This infrastructure delivers long-term regional projections regarding sea-level rise, cyclone intensification, storm surges, biogeochemical shifts, and extreme wind-wave impacts.

3. Exploration and Conservation of Deep-Sea Biodiversity

Executing systematic bio-prospecting field campaigns to catalog deep-sea flora and fauna, isolating piezophilic and piezotolerant deep-sea microbes, and establishing a centralized DNA bank to archive novel marine biomolecules with medical or industrial utility.

4. Deep Ocean Survey and Exploration of Minerals

Conducting deep-water Autonomous Underwater Vehicle (AUV) surveys to pinpoint active and inactive multi-metal hydrothermal sulphide mineralization fields located along the Indian Ocean’s mid-oceanic ridges. This vertical also includes procuring an all-weather, multi-disciplinary research vessel.

5. Energy and Freshwater from the Ocean

Formulating detailed engineering layouts and performance tests for high-capacity, offshore Ocean Thermal Energy Conversion (OTEC) installations. These systems provide green auxiliary power to scale up deep-sea cold-water conduit-driven desalination plants.

6. Advanced Marine Station for Ocean Biology

Setting up dedicated institutional hubs focused on high-end human resource training in marine biology, deep-sea taxonomy, and ocean engineering, while using on-site incubators to turn scientific breakthroughs into scalable commercial enterprises.

Technical Specifications of Project Samudrayaan and Matsya-6000

Structural Design and Material Properties

Project Samudrayaan represents India’s first human-rated deep-ocean expedition vehicle. The primary vehicle, named Matsya-6000, is a self-propelled, crewed submersible engineered to navigate under conditions of extreme hydrostatic pressure.

Engineering Metrics of Matsya-6000

• Crew Capacity: Designed to carry three aquanauts simultaneously (typically two scientists and one pilot).
• Maximum Operational Depth: Rated specifically for 6,000 meters below sea level.
• Pressure Resistance Capacity: Built to withstand external pressures reaching up to 600 bar.
• Operational Endurance: Standard mission duration spans 12 hours under active seabed exploration setups.
• Emergency Life Support: Features an independent secondary life-support backup system capable of sustaining the crew for 96 hours.
• Personnel Sphere Material: Forged from a high-strength Titanium alloy (Grade Ti6Al4V – ELI) featuring a sphere diameter of 2260 mm and a wall thickness of 80 mm.
• Welding Technology: Developed using specialized Electron Beam Welding (EBW) methods augmented from 15kW to 40kW ratings to handle heavy metallic joints.
• Quality Assurance Certification: Monitored via high-energy 7.5 MeV X-ray radiography facilities to perform absolute non-destructive evaluation (NDE) prior to human clearance.

Strategic Geopolitical Rights and Mineral Assets

United Nations International Seabed Authority (ISA) Allocations

Under the provisions of the United Nations Convention on the Law of the Sea (UNCLOS), India holds unique exploration rights across key international waters.

• Polymetallic Nodules (PMN) Allocation: India has been allocated a 75,000 square kilometer site situated within the Central Indian Ocean Basin (CIOB).
• Polymetallic Sulphides (PMS) Allocation: India holds exclusive exploratory exploration rights across 10,000 square kilometers along the Central Indian Ridge (CIR) and Southwest Indian Ridge (SWIR) for mapping hydrothermal vent deposits.

Mineral Composition Profile in CIOB Site

The estimated aggregate volume of polymetallic nodules resting on the seabed floor within the designated Indian sector is close to 380 million tonnes.

Comparative Global Capabilities in Manned Submersibles

India’s successful operational testing of the Matsya-6000 submersible positions the nation within an elite tier of countries possessing human-rated deep-sea exploration tech.

Recent Field Milestones and Progress Tracking

Deep Sea Biodiversity Discoveries

The Centre for Marine Living Resources and Ecology (CMLRE) successfully completed mapping campaigns across 25 seamounts located in the Lakshadweep and Andaman and Nicobar marine sectors. This effort documented 195 deep-sea species, isolating 39 potential new taxonomic variants. Additionally, research teams have isolated 1,845 deep-sea microbes from water and sediment core samples extracted from the Indian Exclusive Economic Zone (EEZ).

Hydrothermal Vent Discoveries

The National Centre for Polar and Ocean Research (NCPOR) deployed deep-water Autonomous Underwater Vehicles (AUVs) to successfully identify two active and two completely inactive multi-metal hydrothermal vents along the Indian Ocean seafloor, confirming high-grade sulphide mineralizations.

Operational Testing and Deployment Timelines

• Initial Sphere Trials: An uncrewed milestone was achieved by testing the prototype personnel sphere down to a depth of 600 meters off the coast of Chennai.
• Autonomous Deep Survey: The deep-water AUV named Ocean Mineral Explorer (OMe 6000) was successfully lowered from the research vessel Sagar Nidhi, completing a high-resolution 14 square kilometer geographic survey at a depth of 5,271 meters within the CIOB mining site.
• Harbor Wet Tests: Conducted low-depth wet harbor trials to assess foundational electronics, buoyancy systems, and communication links under real saltwater exposure.
• Deep Sea Unmanned and Manned Phases: Integrated deep-water unmanned diving sequences are executed to establish physical system integrity before scheduling the final human-crewed 6,000-meter deep ocean descent.