21 November 2025

• India is the world's second-largest aquaculture producer with total aquatic output of 17.54 million tonnes in 2022-23.
• Indigenous defence manufacturing reached Rs 1,54,000 crore in FY 2024-25 with exports crossing Rs 23,622 crore.
• The Geological Survey of India completed 175 years since its formal establishment in 1851.
• A five-judge Supreme Court Constitution Bench ruled that prolonged gubernatorial inaction on State Bills is unconstitutional and subject to judicial review.
• The Index of Eight Core Industries recorded zero growth in October 2025, its weakest reading in 14 months.

GS area: GS-3 (agriculture, allied sectors, food security, government schemes)

India ranks second globally in aquaculture production, trailing only China, and supports approximately 30 million livelihoods across its coastal and inland fishing communities.

• Total aquatic production: 17.54 million tonnes in 2022-23.
• Coastal fishing villages: 3,477 villages sustain the bulk of artisanal marine fishing.
• Inland aquaculture growth: the sub-sector grew 140 percent between 2013-14 and 2024-25, reflecting diversification away from marine capture fisheries.
• Marine export value: USD 0.90 billion in October 2025, an 8 percent year-on-year increase over October 2024.
• PM Matsya Sampada Yojana (PMMSY): Rs 20,312 crore outlay for 2020 to 2026; the flagship scheme has created 730 cold-storage facilities across coastal and inland districts.
• Post-harvest losses: estimated at 15 to 20 percent of total catch, reflecting cold-chain infrastructure gaps.
• Policy significance: PMMSY is the largest investment in fisheries infrastructure in India's history. Its dual objective covers livelihood creation and export-value maximisation.

GS area: GS-3 (defence, internal security, government policy)

India's indigenous defence manufacturing output reached a new peak in FY 2024-25, confirming a decade-long trajectory of capacity building under the Atmanirbhar Bharat initiative.

• FY 2023-24 output: Rs 1,27,434 crore, up from Rs 46,429 crore in 2014-15, representing 174 percent growth over a decade.
• FY 2024-25 output: Rs 1,54,000 crore (approximately), with defence exports at Rs 23,622 crore.
• Export growth: exports grew 23-fold from under Rs 1,000 crore in 2014.
• Destination countries: India now exports defence products to 80 to 100 countries.
• Private sector participation: private-sector share in defence production rose from 21 percent to 23 percent. Over 16,000 MSMEs now participate in the defence supply chain.
• Key policy instruments: two Positive Indigenisation Lists (items reserved for domestic production), defence industrial corridors in Uttar Pradesh and Tamil Nadu, and FDI cap raised to 74 percent under automatic route.
• Prelims hook: the Defence Acquisition Procedure 2020 introduced "Make in India" procurement categories (Make-I, Make-II, Make-III) to distinguish between domestically designed and domestically manufactured products.

GS area: GS-1 (modern India, science and technology institutions)

The Geological Survey of India marked 175 years of continuous service in 2025-26, making it one of the world's oldest geological surveys and India's premier earth-science body.

• Formal establishment: 1851, under Sir Thomas Oldham as the first Superintendent.
• Antecedent usage: John McClelland first used the name "Geological Survey of India" in 1848, three years before the formal constitution.
• Administrative position: attached office under the Ministry of Mines.
• Core functions: geological mapping, mineral exploration, assessment of geohazards (landslides, earthquakes, glacial lake outburst floods), geotechnical studies, and museum curation.
• International partnerships: USGS (United States), BGS (British Geological Survey), and Geoscience Australia for collaborative research and data exchange.
• National significance: GSI's mineral exploration work underpins India's strategic mineral security, including identification of lithium deposits in Rajasthan and coal basin characterisation.

GS area: GS-2 (Indian polity, constitutional provisions, executive-legislature relations)

A five-judge Constitution Bench of the Supreme Court delivered a landmark ruling clarifying the constitutional limits on Governors when handling Bills passed by State Legislatures.

• Constitutional provisions examined: Article 200 (State Bills) and Article 201 (reservation of Bills for Presidential consideration).
• Three options available to a Governor: give assent to the Bill, withhold assent and return the Bill with recommendations for reconsideration, or reserve the Bill for Presidential consideration.
• Ruling on inaction: prolonged or indefinite inaction by a Governor on a State Bill is unconstitutional.
• Judicial review scope: courts can review gubernatorial inaction. Courts cannot, however, review the merits of the decision to withhold assent.
• Constitutional significance: the judgment curtails the use of "pocket veto" tactics by Governors, where Bills are neither assented to nor returned, keeping them in indefinite limbo.
• Background context: several States had petitioned the Supreme Court after Governors withheld assent for months or years without returning Bills with reasons.

GS area: GS-3 (Indian economy, industrial production, economic indicators)

The Index of Eight Core Industries recorded zero percent growth in October 2025, its worst monthly performance in 14 months, signalling stress in the infrastructure-linked industries that anchor India's broader industrial output.

• Publishing authority: Office of the Economic Adviser (OEA), Ministry of Commerce and Industry.
• Base year: 2011-12.
• Eight constituent sectors: coal, crude oil, natural gas, petroleum refinery products, fertilisers, steel, cement, and electricity.
• IIP weight: the eight sectors together account for 40.27 percent of the total weight in the Index of Industrial Production (IIP).
• October 2025 performance: zero percent growth, the worst reading in 14 months.
• Analytical use: because of its 40.27 percent weight in IIP and its monthly release timing (before IIP), the core industries index serves as a leading indicator for industrial output direction.

GS area: GS-3 (internal security, coastal security architecture)

Exercise Sagar Kavach is a biannual coastal security drill organised by the Indian Coast Guard to validate inter-agency Standard Operating Procedures for maritime security.

• Frequency: biannual (twice annually).
• Host agency: Indian Coast Guard.
• Exercise scope: sea patrolling, vessel inspections at sea, harbour security checks, coastline surveillance, and security verification at vital coastal installations.
• Ground coverage: coastal villages, fishing harbours, major ports, and critical infrastructure near the coast.
• November 2025 edition: conducted in Tamil Nadu's Cuddalore and Villupuram districts.
• Participating agencies: the exercise is multi-agency and typically involves the Indian Navy, state marine police, port authorities, and Customs.
• Strategic purpose: India's coastline spans 7,516 km. Post-26/11, coastal security was restructured through the National Committee for Strengthening Maritime and Coastal Security (NCSMCS) under the Cabinet Secretary.

GS area: GS-2 (India's neighbourhood, regional security cooperation)

The 7th National Security Advisers' meeting of the Colombo Security Conclave was hosted in New Delhi, with Seychelles formally joining as a full member.

• Meeting location: New Delhi.
• Participating nations: India, Maldives, Mauritius, Sri Lanka, Bangladesh, and Seychelles (new full member, bringing total to six nations).
• Origin: the Conclave began in 2011 as a trilateral maritime dialogue among India, Sri Lanka, and the Maldives.
• Secretariat: formalised in Colombo in August 2024.
• Five security pillars: Maritime Safety and Security, Counter-Terrorism and Radicalisation, Transnational Organised Crime, Cybersecurity, and Humanitarian Assistance and Disaster Relief (HADR).
• Significance: the Conclave is India's principal minilateral security architecture for the Indian Ocean island states. Its expansion to include Bangladesh and Seychelles broadens India's strategic depth in the IOR.

GS area: GS-1 (physical geography, climatology, India-specific weather systems)

Cold wave conditions in India are defined under specific India Meteorological Department (IMD) criteria, and understanding their mechanism is a recurring Prelims target.

• Plains cold wave criterion: minimum temperature at or below 10 degrees Celsius AND a departure of minus 4.5 to minus 6.4 degrees Celsius from the normal.
• Severe cold wave criterion: departure at or below minus 6.4 degrees Celsius, OR minimum temperature at or below 2 degrees Celsius (regardless of departure).
• Hilly regions criterion: minimum temperature of 0 degrees Celsius or below.
• Meteorological origin: cold waves originate from high-pressure anticyclonic systems over Central Asia or the Himalayan highlands. These systems push cold, dry continental air southward across the Indo-Gangetic Plain.
• Urban heat island: cities experience milder cold wave effects because impervious surfaces and human activity raise ambient temperature by 1 to 3 degrees Celsius relative to surrounding rural areas.
• IMD communication: IMD issues cold wave warnings under its colour-coded alert system (green, yellow, orange, red) depending on severity and forecast duration.

• PMMSY target: PM Matsya Sampada Yojana targets doubling fisheries exports to USD 1 lakh crore by 2025 under its Rs 20,312 crore outlay.
• GSI museum: the Indian Museum in Kolkata holds one of GSI's oldest geological specimen collections, assembled from 19th-century explorations.
• Governors and pocket veto: the Supreme Court judgment reinforces that the Constitution does not recognise an implicit power of absolute veto for Governors over State legislation.
• Hamara Shauchalaya Campaign: launched by the Ministry of Jal Shakti on World Toilet Day (19 November) 2025 to focus on toilet functionality and long-term ODF sustainability, involving NSS, NYKS, and NCC volunteers.
• Sagar Kavach origin: the exercise was institutionalised after the 2008 Mumbai attacks exposed gaps in India's coastal monitoring and inter-agency coordination.