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Subject: Science and Technology

  • Centre Brings Advanced Cell & Gene Therapies Under CLAA Framework

    Why in News?

    The Central Government has amended the Drugs Rules, 1945 to bring Cell or Stem Cell-derived products, Gene Therapeutic Products, and Xenografts under the Centrally License Approving Authority (CLAA) framework, ensuring uniform regulation across India.

    What is the Amendment?

    • Expands the CLAA framework to include: Cell or Stem Cell-derived products, Gene therapeutic products and Xenografts.
    • These products will now be subject to joint oversight by the Central and State Licensing Authorities.

    What is the CLAA Framework?

    • Established under the Drugs and Cosmetics Act, 1940.
    • Provides joint regulatory supervision by Central Licensing Authority and State Licensing Authorities.
    • Earlier covered critical biological products such as Vaccines, Large Volume Parenterals (IV solutions >100 ml), and Recombinant DNA (r-DNA)-based medicines.
    • The amendment expands its scope to emerging advanced therapies.

    Emerging Therapies Covered

    1. Cell or Stem Cell-derived Products

    • Therapies developed using stem cells or other living cells.
    • Used in Regenerative medicine. CAR-T cell therapy for blood cancers such as leukemia and lymphoma.

    2. Gene Therapeutic Products

    • Modify or replace defective genes to treat diseases.
    • Include Gene replacement therapy and Gene editing therapies.
    • Used for Genetic disorders and Certain cancers.

    3. Xenografts

    • Animal tissue or organ-derived products transplanted into humans.
    • Examples: Animal-derived heart valves.
    • Applications: Cardiology and Orthopedics.

    Why is the Amendment Important?

    • Ensures uniform regulatory standards across all States.
    • Enhances patient safety through stricter oversight.
    • Strengthens regulation of rapidly evolving medical technologies.
    • Aligns India’s regulatory framework with global best practices.
    • Promotes innovation while ensuring safe adoption of advanced therapies.

    UPSC Prelims Facts

    • CAR-T (Chimeric Antigen Receptor T-cell) therapy is a form of immunotherapy in which a patient’s T-cells are genetically modified to attack cancer cells.
    • Stem cells are undifferentiated cells capable of self-renewal and differentiation into specialized cell types.
    • Gene therapy involves introducing, replacing, or editing genes to treat or prevent diseases.
    • Xenotransplantation refers to transplantation of living cells, tissues, or organs from one species to another, usually from animals to humans.

    [2026] Which of the following statements with regard to genetic medicine is/are correct ?
    1. Genetic medicines correct/compensate for the faulty genes responsible for disease.
    2. Engineered viruses and lipid nanoparticles are used as carriers of the genetic medicine.
    3. Genetic medicines alter the entire DNA sequence.
    Select the answer using the code given below :

    [A] 1 only

    [B] 2 and 3 only

    [C] 1 and 2 only

    [D] 1, 2 and 3

  • India’s First PinS Instrument Approach Procedure for Helicopter Operations

    Why in News?

    India has approved its first Private Point in Space (PinS) Instrument Approach Procedure for helicopter operations at Undavalli Heliport (Andhra Pradesh). The procedure was developed by the Airports Authority of India (AAI) and approved by the Directorate General of Civil Aviation (DGCA).

    What is PinS (Point in Space)?

    • A satellite based instrument approach procedure designed specifically for helicopters.
    • Enables helicopters to fly safely under Instrument Flight Rules (IFR) even when heliports lack conventional landing systems.
    • Uses GNSS/GAGAN enabled Performance Based Navigation (PBN) instead of ground based navigation aids.
    • Developed according to ICAO Standards and Recommended Practices (SARPs).

    How does PinS work?

    • Guides helicopters to a predefined Point in Space (PinS) using satellite navigation.
    • From the PinS point, the helicopter either lands visually if weather permits, or continues under instrument guidance where applicable.
    • Improves operations during poor visibility, rain, fog and difficult terrain.

    Significance

    • Enhances aviation safety and operational reliability.
    • Enables all weather helicopter connectivity.
    • Improves access to remote, hilly and strategically important locations.
    • Reduces dependence on expensive ground based navigation infrastructure.
    • Supports: Emergency Medical Services (EMS), Disaster relief operations, Char Dham and other pilgrimage services, Tourism, Offshore oil and gas operations, Corporate aviation, and Regional connectivity under UDAN.

    Instrument Flight Rules (IFR)

    • Flight operations conducted primarily using cockpit instruments rather than visual references.
    • Essential during poor weather and low visibility.

    Performance Based Navigation (PBN)

    • Navigation based on aircraft performance standards using satellite navigation.
    • Improves route efficiency, safety and fuel savings.

    GAGAN (GPS Aided GEO Augmented Navigation)

    • India’s Satellite Based Augmentation System (SBAS).
    • Developed jointly by ISRO and AAI.
    • Enhances the accuracy and integrity of GPS signals for civil aviation.

    [2025] GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN?
    I. It is designed to provide additional accuracy and integrity.
    II. It will allow more uniform and high quality air traffic management.
    III. It will provide benefits only in aviation but not in other modes of transportation.
    Select the correct answer using the code given below.

    [A] I, II and III

    [B] II and III only

    [C] I only

    [D] I and II only

  • [1st July 2026] The Hindu OpED: Reimagining sovereign AI for India’s strategic future 

    Mentor’s Comment

    The United States government directed Anthropic to suspend foreign national access to its Fable 5 and Mythos 5 AI models on national security grounds, and is separately considering equity stakes in leading AI companies. At the same time, India lacks frontier AI capability of its own and must rely on foreign models to remain competitive. This dependence carries geopolitical risk that neither market competition nor inter-ministerial coordination alone can resolve.

    What explains the global turn toward sovereign AI policymaking, and why does India need a coordinated response?

    1. US export controls: The US suspended foreign national access to Anthropic’s Fable 5 and Mythos 5 models on national security grounds and created a voluntary mechanism for federal government access up to 30 days before trusted partners.
    2. Equity stake consideration: The US administration is considering taking equity stakes in leading AI firms to capture a share of the supernormal profits expected from the technology.
    3. Global pattern: Governments are increasingly shaping AI policy around national advantage rather than leaving diffusion purely to markets.
    4. India’s structural gap: India is a large IT services economy without its own frontier AI systems (Frontier AI: AI systems requiring upwards of ten septillion floating-point operations to train).
    5. Reason for urgency: Policy decisions made elsewhere increasingly determine the terms on which India can access frontier technology, making a coherent domestic response necessary now.

    Why is India’s AI policy discourse trapped in a false binary, and why must this framing be rejected?

    1. The dependence dilemma: India’s IT and app companies must use the best available foreign AI to remain competitive, yet this use deepens dependence on models built abroad.
    2. Sequencing logic: Using foreign AI today builds the economic surplus needed to depend on it less in future. Diffusion and dependence-reduction are sequential goals, not opposed ones.
    3. Limits of firm-level action: Firms can outcompete rivals using foreign AI. Firms cannot manage the geopolitical risks that accompany dependence on it. That risk-management role falls to public policy.
    4. False binary named: India’s discourse frames globalisation and industrial policy as mutually exclusive. Indian industry must benefit from both at the same time.
    5. Pharma precedent: Indian pharmaceutical manufacturing shows the limits of industrial policy alone. A Production-Linked Incentive (PLI: a government scheme offering incentives tied to incremental domestic manufacturing output) promoted domestic bulk drug production. India still sources 65% of critical ingredients from China, per NITI Aayog’s latest assessment.
    6. Implication: Industrial policy creates footholds. It does not create instant resilience. This sets the correct expectation for AI policy as well.

    What institutional architecture should India build to benefit from frontier AI without deepening strategic dependence?

    1. Scale of the gap: India spends 0.6% of GDP on research and development, of which the private sector accounts for a third. OpenAI alone projects $50 billion in compute spending this year, over six times India’s annual private R&D spend.
    2. Strategic implication: India cannot outspend frontier AI investment. India must instead deepen backward linkages to frontier AI while strengthening forward linkages for its own products and services.
    3. Whole-of-government approach: Ministries of external affairs, commerce, and information technology must coordinate closely. Coordination should extend to defence, energy, and telecom where relevant.
    4. Objective of coordination: The architecture secures continued access to frontier AI inputs. It simultaneously builds global market access for Indian AI-enabled products and services.

    Since coordination alone cannot manage geopolitical risk, what role must the state play in underwriting it?

    1. Limits of firm-level risk management: Firms can manage commercial risk through contracts and diversified supply chains. Firms cannot insure themselves against geopolitical risk or concentrated technological dependence.
    2. Sovereign risk-bearing role: Underwriting such risk is a function only the state can perform. Private capital cannot efficiently bear this risk alone.
    3. Export credit analogy: Export credit mechanisms insure firms against risks they cannot shoulder independently in international trade, offering a template for AI-related risk underwriting.
    4. Hybrid-annuity analogy: The Hybrid-Annuity Model (HAM: an infrastructure financing structure where the state funds part of a project and makes fixed payments over time) reduces the share of risk borne by private capital in long-gestation infrastructure. A comparable approach could apply to frontier AI dependence.

    What do the available global examples suggest about alternative sovereign AI strategies? 

    1. Europe: Shifted from a “regulate first, ask questions later” approach to investing directly in AI compute capacity and promoting “Buy European” public procurement to support its domestic AI industry.
    2. Argentina: Is positioning itself to attract AI investment by offering a regulatory safe harbour under an accommodative regulatory posture.

    Why must India’s technology industry itself close the competitiveness gap, and what does this reveal about the limits of policy alone?

    1. Government’s limits: Government action can create conditions for success. Competitiveness must ultimately come from firms themselves.
    2. Export benchmark: The Philippines generates $40 billion in IT exports, nearly a sixth of India’s IT exports, and is growing faster than the global industry.
    3. App market underperformance: No Indian app features among the top 10 globally by downloads, in-app purchase revenue, or monthly active users.
    4. Fragmented industry voice: Incumbent IT firms remain focused on visas and market access. Startups remain consumed by regulatory friction and fundraising. Both share a common interest in India’s continued connection to global AI ecosystems alongside growing domestic capability.
    5. Core stakes: The central contest in AI is not only over who builds the best models. It is over who captures the economic and strategic advantages the models create.

    Conclusion

    India’s AI strategy must reject the false choice between global integration and domestic capability building. The objective is to remain deeply integrated with global AI ecosystems while steadily reducing the strategic vulnerabilities such integration creates. This requires backward linkages secured through whole-of-government coordination, forward linkages built through competitive Indian products and services, and state-backed risk underwriting on the export-credit and hybrid-annuity model. Without matching ambition from industry itself, government action alone cannot close the gap.

  • [30th June 2026] The Hindu OpED: Why artificial wisdom is the biggest AI risk

    PYQ Relevance[UPSC 2023] Introduce the concept of Artificial Intelligence (AI). How does AI help clinical diagnosis? Do you perceive any threat to privacy of the individual in the use of AI in healthcare?
    Linkage: The PYQ tests understanding of AI’s applications alongside ethical concerns such as privacy, accountability and responsible deployment. The article extends the debate beyond privacy to examine AI-generated misinformation, concentration of AI power, the limits of machine-generated knowledge, and the need for robust AI governance and regulation.

    Mentor’s Comment

    AI debates have centred on job losses and concentration of power among a few firms and nations. A third, less discussed risk is emerging: AI is being treated as a substitute for human cognition, even though it produces information, not knowledge. The conflation of AI output with genuine knowledge has no such precedent and currently has no accountability structure attached to it.

    Why are labour displacement and power concentration considered the more manageable AI risks?

    1. Historical precedent on labour: Technology has automated specific tasks, not entire professions; the steam engine displaced labour into new industries rather than eliminating it.
    2. Expected AI trajectory: Some occupations will shrink, others will expand, and new professions will emerge, mirroring past transitions.
    3. Transition cost is real: The shift will require substantial investment in reskilling, but is not existential.
    4. Capital-intensive economics of AI: Frontier models require massive investment in computing infrastructure, energy, talent and data, restricting ownership to a few firms and countries.
    5. Concentration risk has known parallels: Concentrated control of strategic resources such as gold or oil has historically produced geopolitical leverage and coercive behaviour.
    6. Institutional tools already exist: Legal institutions, international treaties and negotiated frameworks have managed comparable concentration risks before.

    What is the curse of “artificial wisdom” and why is it the most dangerous AI risk?

    1. Core misconception: AI enthusiasts position AI as a substitute for human cognition, leading society to internalise the belief that AI generates knowledge.
    2. What AI actually does: An AI system is trained on data to learn patterns and statistical relationships, and predicts the most probable next step in a sequence.
    3. Knowledge versus information: Information is what AI produces; Knowledge: understanding that requires context, judgment, experience and an understanding of consequences.
    4. Verification requires expertise: Only a human mind with domain expertise can judge whether AI-generated output is useful and appropriate for a given problem.
    5. Why this risk is least understood: It is structurally different from labour and power risks because it changes how truth itself is assessed, not just who holds resources or jobs.

    How does the information-knowledge conflation translate into systemic harm?

    1. Synthetic information advantage: AI-generated content can be more persuasive, accessible or appealing than genuine information.
    2. Erosion of fact-fabrication distinction: Individuals and institutions struggle to separate fact from fabrication, creating conditions for manipulation and misinformation.
    3. Organisational dependence: Organisations increasingly use AI for research, coding, legal drafting and financial analysis.
    4. Unverifiable decision-making: This creates systemic risk because decisions are influenced by intelligence that nobody is qualified to verify.
    5. Paradox of expertise: The AI age makes genuine domain expertise more valuable, since the rarest skill becomes determining whether machine-generated answers are correct.

    Why does AI’s accountability gap require a new governance architecture?

    1. Existing liability model: Manufacturers of harmful pharmaceutical products can be held accountable under established liability law.
    2. AI’s liability gap: AI systems have largely operated without comparable clear liability.
    3. Emerging accountability signal: Meta Platforms has faced lawsuits alleging that its platform design contributed to harm among young users, indicating accountability boundaries are beginning to be redrawn for digital platforms.
    4. Proposed safeguard structure: The response requires both technical and institutional safeguards, backed by a global non-proliferation agreement on disruptive AI.
    5. Containment objective: Such an agreement must allow humans to limit or shut down AI systems operating outside their intended boundaries.
    6. Precedent for restraint: Humanity has avoided nuclear catastrophe for eight decades; AI governance is framed as a comparable challenge of sustained, deliberate restraint.

    Conclusion

    The defining AI risk is not job loss or concentrated ownership, both of which have historical management precedents. It is the unchecked substitution of AI-generated information for genuine knowledge, compounded by the absence of liability and verification structures. Closing this gap requires a global governance architecture combining technical safeguards, institutional accountability, and a non-proliferation framework for disruptive AI capabilities, built before reliance on unverified AI output becomes irreversible.

  • What India’s 12 ‘operationally deployed’ nuclear warheads mean

    Why in the News?

    SIPRI’s 2026 Yearbook classified 12 of India’s 190 nuclear warheads as operationally deployed for the first time. These are positioned with active military forces mated with delivery systems and ready for use.The classification has triggered concern over a possible shift in India’s No First Use (NFU) doctrine.

    Why does SIPRI’s “deployment” classification not indicate a shift in India’s nuclear doctrine?

    1. No change in launch policy: NFU commits India to not launching a pre-emptive strike; SIPRI’s report records no revision of this commitment.
    2. No threshold lowering: The report does not indicate any lowering of the threshold for nuclear employment.
    3. No change in political control: Civilian and political oversight mechanisms governing nuclear release remain unaltered.
    4. Expert confirmation: Warheads mated with delivery platforms make assured retaliation more credible, not less restrained.
    5. Reaffirmed commitment: India’s representatives reaffirmed NFU and non-use against non-nuclear-weapon states at the UN High-Level Meeting in September 2025.
    6. Internal calls for first-use rejected: Periodic domestic proposals for a conditional or hybrid first-use posture have not prevailed.

    Why does the stockpile-deployment distinction matter for assessing India’s posture?

    Possessing a warhead and deploying it as part of an operational deterrent are not the same condition. The distinction determines whether a count of warheads signals readiness or merely holdings.

    1. De-mated baseline: For most of its nuclear history, India stored warheads separately from delivery vehicles at a central site under strict oversight.
    2. Purpose of de-mating: This was meant to maximise safety, reduce accidental-use risk, and signal restraint internationally.
    3. Definition of deployment: Deployment pairs a warhead with a delivery system and positions it with operational forces in readiness.
    4. Readiness, not intent: A deployed weapon is configured for use if authorised; it is not a signal of imminent use.
    5. Speed differential: A de-mated weapon needs time to prepare and deploy; a mated weapon can be launched faster.
    6. Scale of the shift: SIPRI’s count reflects a small but significant fraction of India’s arsenal now held in operational readiness, not a wholesale change in posture.

    How does the sea-based deterrent resolve the central vulnerability in India’s NFU doctrine?

    NFU is a retaliation-only doctrine, so it stands or falls on whether the force can survive a first strike. Sea-basing closes the specific gap that land-based deployment cannot.

    1. Survivability requirement: NFU depends on enough of the arsenal surviving a first strike to deliver a retaliatory blow; without this, NFU becomes a liability rather than a doctrine.
    2. Land-based vulnerability: Land-based missiles sit at known, mappable locations and can be targeted in a disarming first strike.
    3. Sea-based advantage: A submerged submarine cannot be found, tracked, or destroyed in time, removing this vulnerability.
    4. Arihant-class platform: India’s Arihant-class submarines have steadily strengthened second-strike survivability, with additional platforms expected to further consolidate this leg of the triad.
    5. Operational milestone: Three operational SSBNs allow India to keep at least one submarine submerged and on patrol at all times.
    6. Supporting readiness measure: Increasing reliance on canisterised Agni-series missiles, which carry fuel sealed and ready, raises operational readiness without requiring further preparation before launch.

    What broader trend does India’s deployment milestone sit within, and why does it matter?

    1. Global reversal: SIPRI’s 2026 Yearbook records states increasingly relying on nuclear weapons as instruments of national power, reversing decades of gradual disarmament progress.
    2. Scale of global arsenals: Nine nuclear-armed states held an estimated 12,187 warheads as of January 2026.
    3. China’s pace: China’s arsenal has grown to approximately 620 warheads, expanding faster than any other nuclear power and now over three times Pakistan’s estimated stockpile.
    4. Dual-direction posture: India’s modernisation is increasingly focused on long-range systems capable of reaching China, while continuing to account for Pakistan.
    5. Weakening arms control: Arms-control agreements have weakened or collapsed even as competition intensifies in hypersonic delivery, AI-enabled decision support, missile defence, and anti-submarine warfare.
    6. Unresolved risk: The maturation of India’s second-strike capability strengthens deterrence bilaterally, but does nothing to address the rising risk of miscalculation across a destabilising global order.

    Conclusion

    SIPRI’s classification of 12 Indian warheads as operationally deployed documents the maturing of India’s sea-based second-strike capability, not a retreat from No First Use. This development, however, sits inside a global environment where arms-control frameworks are weakening and major powers are re-arming. The institutions designed to manage nuclear risk must adapt to this faster-fielding environment, or the credibility gained through India’s improved deterrent will be offset by a rising structural risk of miscalculation.

    PYQ Relevance

    [UPSC 2017] Give an account of the growth and development of nuclear science and technology in India. What is the advantage of fast breeder reactor programme in India?

    Linkage: Tests India’s strategic nuclear capabilities, indigenous nuclear development and the evolution of its deterrence architecture.The article explains how India’s maturing nuclear triad and operational deployment strengthen its credible minimum deterrence and second-strike capability without altering its No First Use doctrine.

  • Advancing Electrolyte Engineering for Durable and Affordable Aqueous Batteries

    Why in News?

    Scientists at the Institute of Nano Science and Technology (INST), Mohali, under the Department of Science and Technology (DST), have developed a novel electrolyte additive that significantly improves the performance and lifespan of Aqueous Zinc Ion Batteries (AZIBs).

    What are Aqueous Zinc Ion Batteries (AZIBs)?

    • Rechargeable batteries that use zinc metal as the anode and a water-based electrolyte.
    • Considered a promising alternative to lithium-ion batteries because they are Safer (non-flammable electrolyte), Low-cost (abundant zinc), Environment-friendly, and Suitable for large-scale energy storage.

    Challenges in AZIBs

    • Growth of zinc dendrites (needle-like deposits causing short circuits)
    • Hydrogen Evolution Reaction (HER) leading to gas formation
    • Corrosion of zinc anode
    • Poor cycling stability and reduced battery life

    Key Innovation

    • Researchers developed an electrolyte additive called BDIM (1,3-bis(1,3-dicarboxypropyl)-1H-imidazole-3-ium chloride).
    • BDIM selectively adsorbs on the zinc surface and regulates the Inner Helmholtz Plane (IHP).
    • It displaces water molecules from the electrode surface, thereby:
      • Suppressing hydrogen evolution
      • Reducing corrosion
      • Preventing dendrite formation
      • Enhancing battery lifespan and stability

    Important Concepts

    • Electrolyte: A medium containing ions that enables the flow of electric charge between battery electrodes.
    • Inner Helmholtz Plane (IHP): The innermost layer at the electrode-electrolyte interface where electrochemical reactions occur. Controlling this layer improves battery efficiency and durability.
    • Research Techniques Used
      • Ultramicroelectrode (UME): Tiny electrode (<50 µm) enabling high-resolution electrochemical studies.
      • Fast-Scan Cyclic Voltammetry (FSCV): Technique used to study rapid charge-transfer and zinc deposition mechanisms.

    [2025] In the context of electric vehicle batteries, consider the following elements:
    I. Cobalt
    II. Graphite
    III. Lithium
    IV. Nickel
    How many of the above usually make up battery cathodes?

    [A] Only one

    [B] Only two

    [C] Only three

    [D] All the four

  • DAE Inaugurates World’s First Nuclear Heat Based Hydrogen Production Facility

    Why in News?

    The Department of Atomic Energy (DAE) has inaugurated the world’s first hydrogen production facility based on the Copper-Chlorine (Cu-Cl) Thermochemical Cycle using nuclear process heat from the Fast Breeder Test Reactor (FBTR) at Kalpakkam.

    Key Highlights

    • First in the world to produce hydrogen using the Cu-Cl thermochemical cycle powered by nuclear heat.
    • Established at the Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam.
    • Uses process heat from the Fast Breeder Test Reactor (FBTR) instead of fossil fuels.
    • Technology developed indigenously by the Bhabha Atomic Research Centre (BARC).
    • Serves as a technology demonstrator for future commercial-scale nuclear hydrogen production.

    What is the Copper-Chlorine (Cu-Cl) Thermochemical Cycle?

    The Cu-Cl cycle is a series of chemical reactions that split water into hydrogen and oxygen using heat and electricity.

    Process

    • Water reacts with copper and chlorine compounds.
    • High-temperature nuclear heat drives most of the reactions.
    • Hydrogen gas is produced while intermediate chemicals are recycled.

    Advantages

    • Operates at lower temperatures (≈500°C) than many other thermochemical cycles.
    • Higher thermodynamic efficiency.
    • Requires less electricity.
    • Produces zero greenhouse gas emissions when powered by nuclear energy.

    Why Use Nuclear Heat?

    • Fast reactors generate both Carbon-free electricity and High-temperature process heat.
    • Using this heat:
      • Reduces dependence on natural gas for hydrogen production.
      • Improves overall reactor efficiency.
      • Enables continuous hydrogen production irrespective of weather conditions.

    Fast Breeder Test Reactor (FBTR)

    • Located at IGCAR, Kalpakkam.
    • India’s only operating fast reactor research facility.
    • Commissioned in 1985.
    • Uses liquid sodium as coolant.
    • Produces plutonium while generating power.

    [2023] Consider the following heavy industries:
    1. Fertilizer plants
    2. Oil refineries
    3. Steel plants
    Green hydrogen is expected to play a significant role in decarbonizing how many of the above industries?

    [A] Only one

    [B] Only two

    [C] All three

    [D] None

  • Netra AEW&C System Receives Final Operational Clearance (FOC)

    Why in the news?

    The Defence Research and Development Organisation (DRDO) has handed over the Final Operational Clearance (FOC) certificate of the indigenous Netra Airborne Early Warning & Control (AEW&C) system to the Indian Air Force (IAF). The system had received Initial Operational Clearance (IOC) in 2017.

    What is Netra AEW&C?

    • Netra is an Airborne Early Warning and Control (AEW&C) system developed indigenously by DRDO’s Centre for Airborne Systems (CABS) in collaboration with the IAF and Indian industry.
    • Mounted on a modified Embraer ERJ-145 aircraft.
    • Functions as a “flying radar”, providing airborne surveillance, early warning, command and battle management.

    Key Features

    • 360° situational awareness through networked surveillance.
    • Detects and tracks: Fighter aircraft, Cruise missiles, Drones/UAVs, Helicopters, and Surface targets.
    • Provides: Airspace surveillance, Threat detection, Target tracking, Battle management, and Command and control support.
    • Enhances interoperability with ground-based and airborne assets.

    Prelims Pointers

    • AEW&C: Airborne Early Warning and Control system for surveillance and battle management.
    • FOC (Final Operational Clearance): Certification that a defence system is fully operational and combat-ready.
    • IOC (Initial Operational Clearance): Limited operational induction after successful initial trials.
    • CABS: Centre for Airborne Systems, a DRDO laboratory responsible for airborne surveillance systems.

    [2025] With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements:
    I. All types of UAVs can do vertical landing.
    II. All types of UAVs can do automated hovering.
    III. All types of UAVs can use battery only as a source of power supply.
    How many of the statements given above are correct?

    [A] Only one

    [B] Only two

    [C] All the three

    [D] None

  • SAIL Supplies Defence Grade Steel for Indian Navy Warships

    Why in News?

    The Steel Authority of India Limited (SAIL) supplied 5,700 tonnes of indigenous defence grade steel for three Indian Navy ships, INS Dunagiri, INS Agray, and INS Sanshodhak, commissioned on 21 June 2026. The move strengthens India’s defence indigenisation under Atmanirbhar Bharat and Make in India.

    Key Highlights

    • SAIL supplied 100% of the special steel requirement (5,700 tonnes) for INS Dunagiri (Stealth Frigate), INS Agray (ASW Shallow Water Craft), and INS Sanshodhak (Survey Vessel)
    • Steel supplied DMR 249A grade hot rolled sheets and plates (Defence grade steel).
    • Manufactured at Bokaro Steel Plant, Bhilai Steel Plant, and Rourkela Steel Plant
    • Production of DMR grade plates has been expanded, especially at the Special Plate Plant, Rourkela, to meet defence needs.

    What is DMR 249A Steel?

    • DMR (Defence Metallurgical Research) 249A is a high strength, low alloy steel developed for naval warships.
    • Features: High tensile strength, Excellent weldability, High toughness, Corrosion resistance in marine environments, and Better survivability under combat conditions.
    • Other Major Naval Platforms Using SAIL Steel: INS Vikrant, INS Nilgiri, INS Himgiri, INS Udaygiri, INS Ajay, INS Nistar, and INS Anjadeep

    Significance

    • Enhances self reliance in defence manufacturing.
    • Reduces dependence on imported naval steel.
    • Strengthens India’s indigenous shipbuilding capability.
    • Supports strategic maritime security and blue water naval ambitions.
    • Demonstrates collaboration between public sector steel manufacturing and defence production.

    [2016] Which one of the following is the best description of ‘INS Astradharini’, that was in the news recently?

    [A] Amphibious warfare ship

    [B] Nuclear-powered submarine

    [C] Torpedo launch and recovery vessel

    [D] Nuclear-powered aircraft carrier

  • Indian Telecom Services Performance Indicator Report (Jan-Mar 2026)

    Why in News?

    TRAI released the Indian Telecom Services Performance Indicator Report for the quarter ending 31 March 2026, highlighting growth in telecom, internet, broadband, DTH, and broadcasting sectors.

    Telecom

    • Total telephone subscribers: 1,330.58 million (↑1.87% QoQ).
    • Tele-density:93.26%: Urban: 151.47% and Rural: 60.46%
    • Private operators’ market share: 92.32%.

    Internet & Broadband

    • Internet subscribers: 1,092.79 million (↑6.24% QoQ).
    • Broadband subscribers: 1,065.88 million.
    • Wireless internet: 1,046.26 million.
    • Wired internet: 46.54 million.
    • Internet penetration: 76.59 per 100 population.

    Wireless Services

    • Wireless (Mobile + FWA) subscribers: 1,282.33 million.
    • Wireless (Mobile) subscribers: 1,265.73 million.
    • 5G FWA subscribers: 16.61 million.
    • Average wireless data usage: 26.70 GB/subscriber/month.

    Revenue & Usage

    • Monthly Wireless ARPU: ₹196.04.
    • Minutes of Usage (MOU): 1,017 minutes/subscriber/month.
    • Adjusted Gross Revenue (AGR): ₹86,716 crore.

    Broadcasting

    • Private satellite TV channels: 917
    • Pay TV channels: 342
    • Private FM channels: 390 across 120 cities
    • Pay DTH subscribers: 49.05 million
    • Community Radio Stations: 564.

    Prelims Pointer

    • TRAI is a statutory body established under the Telecom Regulatory Authority of India Act, 1997.
    • It regulates telecom services, ensures consumer protection, promotes competition, and recommends licensing and spectrum policies.
    • Tele-density = Number of telephone connections per 100 population.

    [2019] With reference to communications technologies, what is/are the difference/differences between LTE (Long-Term Evolution) and VoLTE (Voice over Long-Term Evolution)?
    1. LTE is commonly marketed as 3G and VoLTE is commonly marketed as advanced 3G.
    2. LTE is data-only technology and VoLTE is voice-only technology.
    Select the correct answer using the code given below.

    [A] 1 only

    [B] 2 only

    [C] Both 1 and 2

    [D] Neither 1 nor 2