Unit 5.3: Deep Ocean Mission & Offshore Resources
Indian Geography → Indian Geography → RESOURCES & ECONOMIC GEOGRAPHY → RESOURCES & ECONOMIC GEOGRAPHY → Mineral Resources | Author: admin | Feb 11, 2026
TYPE 1: DETAILED NOTES
1. Introduction This unit focuses on India's Deep Ocean Mission (DOM) and offshore resources within the Exclusive Economic Zone (EEZ) and continental shelf. The Deep Ocean Mission (2021–ongoing) aims to explore and harness deep-sea resources (polymetallic nodules, cobalt crust, hydrothermal sulphides) for strategic minerals, energy, and biodiversity. Offshore resources include hydrocarbons, minerals, and renewable energy potential in India's 2.02 million sq km EEZ. The unit covers mission components, technologies, environmental concerns, and policy linkages.
2. Significance This unit is crucial for 2026 exams — it carries 6–10 marks in Prelims (MCQs on DOM components, EEZ extent, nodule types) and 8–12 marks in Mains (analytical on deep-sea mining, strategic minerals, EEZ disputes, sustainability). SSC/RRB/JE test factuals (mission pillars, EEZ area); State PSC focus on coastal states. Linkages to current: DOM progress (2025–2026 Samudrayaan trials), critical minerals push, EEZ patrols amid South China Sea tensions, Sagarmala offshore integration. Master this for high scores in GS3 (resources, environment, security).
3. Chronological/Geological Timeline
- 1982: UNCLOS defines EEZ (200 nm) and continental shelf (up to 350 nm).
- 1995: India ratifies UNCLOS.
- 2009–2014: India submits extended continental shelf claim to UN.
- 2021: Deep Ocean Mission launched (?4,077 crore budget, 5 years).
- 2022–2024: Varaha (2022) and Samudrayaan (2024) trials for manned submersibles.
- 2025–2026: Nodule collection tests; offshore mining policy draft; EEZ exploration licenses.
4. Concept Deep Dive Deep Ocean Mission: Step 1 – Survey and exploration (polymetallic nodules at 4–6 km depth). Step 2 – Develop technologies (manned submersible, ROVs). Step 3 – Extract minerals (nodules contain manganese, nickel, copper, cobalt). Step 4 – Biodiversity and environmental impact assessment. Offshore Resources: EEZ (2.02 million sq km) ? hydrocarbons (Krishna-Godavari basin), minerals (nodules in Central Indian Ocean Basin), renewables (offshore wind). Challenges: High cost, environmental risks (sediment plumes), international regulations (ISA). (Ref: Majid Husain Ch. 5 "Marine Resources"; Savindra Singh Ch. 14 "Offshore Deposits"; Goh Cheng Leong Ch. on Oceans; NCERT Class 11 India Physical Environment Ch. 4 for EEZ).
5. Key Terminology Box
- Deep Ocean Mission (DOM): India's program for deep-sea exploration (2021).
- Polymetallic Nodules: Potato-shaped mineral concretions (Mn, Ni, Cu, Co).
- EEZ (Exclusive Economic Zone): 200 nm from baseline; resource rights.
- Continental Shelf: Seabed extension beyond EEZ (up to 350 nm).
- Samudrayaan: Manned deep-sea mission (2024 trials).
- ISA (International Seabed Authority): UN body regulating deep-sea mining.
- Sediment Plume: Disturbance cloud from mining; environmental risk.
- Critical Minerals: Nodules contain nickel, cobalt, manganese.
6. Important Factual Details
| Aspect | Details | 2026 Updates / Examples |
|---|---|---|
| EEZ Area | 2.02 million sq km | Includes Andaman & Lakshadweep |
| Continental Shelf Claim | Extended to 350 nm (submitted 2009) | Partial approval; ongoing |
| Deep Ocean Mission Budget | ?4,077 crore (2021–2026) | Phase 2 focus on extraction |
| Polymetallic Nodules | Central Indian Ocean Basin | 4–6 km depth; Ni, Co, Mn, Cu |
| Samudrayaan Trials | 2024 manned submersible (6,000 m) | Successful tests; 2026 collection planned |
| Offshore Resources | Hydrocarbons (KG basin), nodules, wind | Offshore wind auctions (2025–2026) |
7. Frequently Asked Exam Facts
- India's EEZ: 2.02 million sq km.
- Deep Ocean Mission: Launched 2021.
- Polymetallic nodules: Contain nickel, cobalt, manganese.
- Samudrayaan: Manned submersible mission.
- ISA: Regulates deep-sea mining.
- Continental shelf: Up to 350 nm extended claim.
- Critical minerals: Nodules provide cobalt, nickel.
- Central Indian Ocean Basin: Nodule-rich area.
- Offshore wind: Emerging resource (2025 auctions).
- Environmental concern: Sediment plumes.
8. Comparison Charts/Tables
| Aspect | Deep Ocean Resources (Nodules) | Offshore Hydrocarbons |
|---|---|---|
| Depth | 4–6 km | 1–3 km |
| Minerals/Energy | Mn, Ni, Co, Cu | Oil, natural gas |
| Technology | Submersibles, collectors | Drilling rigs, platforms |
| Regulation | ISA (international waters) | UNCLOS + national (EEZ) |
| Status 2026 | Exploration (DOM trials) | Production (KG basin) |
9. Spatial Context
- Polymetallic Nodules: Central Indian Ocean Basin (Indian EEZ portion).
- Hydrocarbons: Krishna-Godavari basin (AP), Mumbai High (Maharashtra), Cauvery basin (TN).
- Offshore Wind: Gujarat, Tamil Nadu coasts (2025–2026 auctions).
- Deep-sea exploration: Andaman & Nicobar EEZ potential.
- Salem/TN relevance: TN offshore (Cauvery basin) has hydrocarbon potential; coastal districts (near Salem) linked to EEZ resources and Sagarmala ports. Image credit: Wikimedia Commons (CC-BY-SA 4.0) via search, showing map of India's EEZ and continental shelf with nodule-rich areas labeled. Image credit: Wikimedia Commons (Public Domain) via search, showing diagram of polymetallic nodules and deep-sea mining process.
10. Flowchart Summary Deep Ocean Mission ? Survey & Exploration (nodules, crusts) ? Technology Development (Samudrayaan, ROVs) ? Resource Extraction ? Environmental Assessment ? Sustainable Use (critical minerals, energy). Image credit: Wikimedia Commons (CC-BY-SA 4.0) via search, showing flowchart of Deep Ocean Mission components and objectives.
11. Ultra-Short Exam Capsule
- DOM: Launched 2021, ?4,077 crore.
- EEZ: 2.02 million sq km.
- Nodules: Mn, Ni, Co, Cu.
- Samudrayaan: Manned deep-sea mission.
- ISA: Regulates deep-sea mining.
- Offshore wind: Gujarat-TN focus.
- Critical minerals: Nodule source.
TYPE 2: QUICK REVISION & EXAM TRICKS
1. Highlights & Tricky Points
- Key: DOM for nodules; EEZ 2.02 million sq km.
- Trap: "Nodules at shallow depth?" — No; 4–6 km.
- Trap: "EEZ = full sovereignty?" — No; resource rights only.
- Trap: Confuse nodules (polymetallic) with hydrocarbons (oil/gas).
2. Memory Aids/Mnemonics
- Nodule metals: "Manganese Nickel Cobalt Copper" ? "MNCC".
- DOM pillars: "Survey Technology Extraction Environment" ? "STEE".
- EEZ: "2 Million Sq Km" ? "2MSK".
3. Confusing Concepts
- EEZ vs Continental Shelf: EEZ = 200 nm (water + seabed); Shelf = up to 350 nm (seabed only).
- India claims extended shelf.
- Nodules vs Crusts: Nodules = potato-shaped on seabed; Crusts = thin layers on seamounts.
- Both contain critical minerals.
TYPE 3: PYQs & EXPECTED QUESTIONS
1. PYQ Vault
- UPSC Prelims 2023: Deep Ocean Mission is related to? ? Exploration of deep-sea resources.
- SSC CGL 2024: India's EEZ area is approximately? ? 2 million sq km.
- UPSC Prelims 2024: Polymetallic nodules contain which critical minerals? ? Nickel, cobalt, manganese.
- RRB NTPC 2024: Samudrayaan is part of? ? Deep Ocean Mission.
- SSC CGL 2023: ISA stands for? ? International Seabed Authority.
- State PSC (TNPSC 2023): Deep Ocean Mission budget is? ? ?4,077 crore.
- SSC CGL 2024: Polymetallic nodules are found at depth of? ? 4–6 km.
- RRB JE 2024: Critical minerals from deep sea include? ? Cobalt and nickel.
- BPSC 2024: Continental shelf extends up to? ? 350 nm (extended claim).
- TNPSC 2024: Deep Ocean Mission launched in? ? 2021.
2. 2026 Expected Questions
- What is the Deep Ocean Mission and its key objectives?
- Describe the role of polymetallic nodules in India's critical minerals strategy.
- Explain the extent and significance of India's EEZ.
- What is Samudrayaan and its importance?
- How does the International Seabed Authority regulate deep-sea mining?
- What environmental concerns are associated with deep-sea resource extraction?