Prelims Pinpointer 03 & 04-05-2026

Lipulekh Pass

Context

• Nepal has reiterated its claim over the Kalapani–Limpiyadhura–Lipulekh region, raising concerns over the Kailash Mansarovar Yatra route.
• India has responded that Nepal’s claims lack historical basis, highlighting an ongoing boundary sensitivity.

Location

• The Lipulekh Pass is a high-altitude Himalayan pass.
• Located in Kumaon region (Pithoragarh district), Uttarakhand.
• Lies near the tri-junction of India, Nepal, and China (Tibet Autonomous Region).
• Geographical Setting
  • Situated in the Vyas Valley of the higher Himalayas.
  • Connects Uttarakhand (India) with Tibet (China).
  • Part of the trans-Himalayan trade and pilgrimage routes.

Strategic Significance

• Acts as a key border pass for India-China trade.
• Important for military logistics and border management in high-altitude terrain.
• Located in a sensitive tri-junction zone, making it geopolitically significant.

Religious Importance

• Serves as a route for the Kailash Mansarovar Yatra.
• Provides access to Mount Kailash and Lake Mansarovar in Tibet.

Sarna Religion

Context

• Jharkhand Chief Minister has sought inclusion of a separate ‘Sarna religion code’ in Census 2027 to ensure distinct identification of tribal communities. The demand highlights the need for accurate socio-religious classification for targeted welfare and policy design.

More in News

• Around 50 lakh people identified as ‘Sarna’ in Census 2011, despite absence of a separate code.
• The demand aims to distinguish tribal religious identity from other major religions.
• However, the concerns exist that introducing new categories may complicate Census operations.

About Sarna Religion

• Sarna is a nature-centric tribal faith practiced primarily by Adivasi communities.
• Core philosophy revolves around “Jal, Jungle, Zameen” (water, forest, land).
• Key Features
  • Followers worship nature elements such as trees, hills, and sacred groves.
  • Does not involve idol worship or organised temple-based rituals.
  • Rejects Varna system and concepts like heaven–hell.
  • Strongly linked with environmental conservation and community traditions.
• Geographical Distribution
  • Concentrated in tribal belt states:
    • Jharkhand
    • Odisha
    • Bihar
    • West Bengal
    • Assam

Nuclear Non-Proliferation Treaty (NPT)

About NPT

• A multilateral treaty aimed at preventing spread of nuclear weapons.
• Drafted by the 18-Nation Committee on Disarmament.
• Opened for signature in 1968 and entered into force in 1970.
• Membership: 191 countries.
• Three Pillars of NPT
  • Non-Proliferation: Prevent spread of nuclear weapons.
  • Disarmament: Promote gradual elimination of nuclear arsenals.
  • Peaceful Use: Allow nuclear technology for civilian purposes.

Classification under NPT

• Nuclear Weapon States (NWS)
  • Defined as states that tested nuclear weapons before 1 January 1967.
  • Includes:
    • United States
    • Russia
    • United Kingdom
    • France
    • China
• Non-Nuclear Weapon States (NNWS)
  • Agree not to acquire nuclear weapons.
  • Receive access to peaceful nuclear technology under safeguards.
• Key Provisions
  • NNWS cannot develop or acquire nuclear weapons.
  • NWS cannot transfer nuclear weapons or assist others in acquiring them.
  • Promotes International Atomic Energy Agency (IAEA) safeguards.

International Atomic Energy Agency (IAEA)

About IAEA

• An intergovernmental organisation promoting peaceful use of nuclear energy.
• Seeks to prevent diversion of nuclear technology for military purposes.
• Established in 1957 under the “Atoms for Peace” initiative.
• Institutional Features
  • Governed by its Statute of the IAEA (independent founding treaty).
  • Reports to:
    • United Nations General Assembly (UNGA)
    • United Nations Security Council (UNSC)
  • Headquarters: Vienna, Austria.
• Membership
  • 178 member states.
  • India is a founding member.
• Core Functions
  • Promotes safe, secure, and peaceful nuclear technology use.
  • Implements nuclear safeguards and inspections.
  • Facilitates international cooperation in nuclear science and technology.
  • Ensures nuclear safety and radiation protection standards.
• Recognition
  • Awarded the Nobel Peace Prize (2005) for promoting nuclear safety and non-proliferation.

About International Conference on Nuclear Security (ICONS)

• A major global platform organised by IAEA for nuclear security dialogue.
• Key Insights (ICONS 2024)
  • 145 countries report incidents involving radioactive/nuclear materials.
  • Radioactive materials widely used in:
    • Medical sector
    • Industry
    • Research institutions
  • Concern over use in “dirty bombs” (radiological dispersal devices).

Dirty BombA radiological dispersal device using conventional explosives to spread radioactive material.Causes contamination and panic rather than large-scale destruction.

Mission Drishti (OptoSAR Satellite)

Context

• India’s first privately developed Earth observation satellite, Mission Drishti, has been launched aboard SpaceX’s Falcon 9 rocket from California.
• The mission introduces the world’s first operational integration of Electro-Optical and SAR sensors, marking a technological milestone.

About Mission Drishti

• Developed by GalaxEye, a Bengaluru-based space start-up.
• Weighs approximately 190 kg, making it India’s largest privately built EO satellite.
• Designed to address limitations in conventional satellite imaging systems.

OptoSAR Technology

• Integrates:
  • Electro-Optical (EO) sensors for high-resolution visual imagery.
  • Synthetic Aperture Radar (SAR) for all-weather, day-night imaging.
• Enables simultaneous observation of the same geographical area, improving data accuracy and usability.

Key Features

• Provides continuous imaging capability irrespective of weather or light conditions.
• Eliminates dependency on multi-satellite data fusion.
• Utilises artificial intelligence to generate optical-like outputs from SAR data.
• Ensures higher temporal consistency and improved data reliability.

Significance

• Particularly relevant for tropical regions with high cloud cover.
• Enhances applications in disaster management, agriculture, defence, and environmental monitoring.
• Represents a significant step in India’s private space sector capabilities.

OPEC  and OPEC+

About OPEC

• The Organization of the Petroleum Exporting Countries (OPEC) is a permanent intergovernmental organisation established in 1960 at the Baghdad Conference.
• Founding members: Iran, Iraq, Kuwait, Saudi Arabia, Venezuela.
• Headquarters: Vienna, Austria.
• Objective
  • To coordinate petroleum policies among members.
  • To ensure stable oil prices, regular supply, and fair returns.
• Institutional Features
  • Operates on “one member, one vote” and unanimity principle.
  • Holds about 80% of global proven crude oil reserves.

About OPEC+

• Formed in 2016, also known as the Vienna Group.
• It is a coalition of OPEC + 10 non-OPEC oil-producing countries.
• Key Non-OPEC Members
  • Russia, Kazakhstan, Mexico, Oman, Azerbaijan, etc.

• Objective
  • To stabilise oil markets through coordinated production adjustments.
• Significance
  • Accounts for ~40% of global crude oil production.

Benchmark Crude Oil Prices

Context

• Recent volatility in oil markets, especially around the Strait of Hormuz, has highlighted that benchmark crude prices may not reflect actual market conditions.
• Disruptions in physical supply chains have widened the gap between paper prices and real transaction prices.

What are Benchmark Crude Prices?

• Benchmark crude prices are reference prices used globally to price different types of crude oil.
• They serve as pricing standards for oil trade, contracts, and futures markets.
• Major Global Benchmarks
  • Brent Crude → Used for pricing Europe, Africa, and parts of Asia.
  • West Texas Intermediate → US benchmark crude.
  • Dubai/Oman Crude → Used for pricing oil exports to Asia.
• How Benchmark Prices are Determined
  • Based on futures trading in commodity exchanges.
  • Reflect expected supply-demand conditions, not immediate physical availability.
  • Influenced by:
    • Geopolitical events
    • Speculation
    • Inventory levels
    • Production decisions (e.g., OPEC+)

Paper Market vs Physical Market

• Paper Market (Futures Market)
  • Trading of oil contracts (not actual oil).
  • Prices reflect expectations of future supply-demand.
• Physical Market
  • Actual buying and selling of crude oil shipments.
  • Prices reflect real-time supply constraints.

NASM-SR (Naval Anti-Ship Missile – Short Range)

Context

• India successfully tested an indigenously developed helicopter-launched anti-ship missile from the Odisha coast.
• The test marks a significant advancement in naval strike capability and indigenous defence technology.

About NASM-SR

• NASM-SR is a short-range, helicopter-launched anti-ship missile.
• Developed by Defence Research and Development Organisation in collaboration with the Indian Navy.
• Designed for deployment from ship-borne helicopters (e.g., Sea King 42B).

Key Features

• Solid propulsion system with booster and sustainer engine.
• Equipped with seeker technology for target detection and tracking.
• Includes radio altimeter for altitude measurement during flight.
• Features two-way data link enabling real-time communication with operator.
• Uses proximity fuse for detonation near target.

Operational Capabilities

• Enables helicopters to engage hostile ships from stand-off distance.
• Can be launched in salvo mode (multiple missiles in quick succession).
• Enhances ability to overwhelm enemy ship defence systems.

Advantages over Older Systems

• Lighter (~380 kg) compared to older Sea Eagle missile (~580 kg).
• Improved targeting, communication, and adaptability.
• Indigenous development ensures strategic autonomy.

Range & Performance

• Range: ~55 km.
• Designed for low-altitude, sea-skimming trajectory to evade radar detection.

Auroras

What are Auroras?

• Auroras are natural light displays in Earth’s upper atmosphere, predominantly observed in high-latitude regions near the poles.
• They appear as curtains, arcs, rays, or flickering patterns of coloured light.

Types of Auroras

• Aurora Borealis (Northern Lights)
  • Occurs in the Northern Hemisphere, near the Arctic Circle.
  • Visible in regions such as:
    • Norway, Sweden, Finland
    • Iceland
    • Canada and Alaska
• Aurora Australis (Southern Lights)
  • Occurs in the Southern Hemisphere, near the Antarctic Circle.
  • Visible in:
    • Antarctica
    • Australia and New Zealand
    • Southern South America

Mechanism of Formation

• The Sun emits solar wind (charged particles: electrons and protons).
• Earth’s magnetic field (magnetosphere) deflects most particles.
• Some particles are guided along magnetic field lines toward the poles.
• They collide with gases in the upper atmosphere, producing light emissions.

Colour Formation

• Oxygen: Green / Red light
• Nitrogen: Blue / Purple light

Role of Solar Activity

• Enhanced during:
  • Solar flares
  • Coronal Mass Ejections (CMEs)
• These increase intensity of solar wind, leading to stronger auroral displays.

Apnea Test

Context

• The Supreme Court has directed AIIMS, New Delhi to constitute an expert committee to evaluate the reliability of the apnea test in determining brain death.
• The directive follows concerns regarding potential malpractice in brain-death certification linked to organ transplantation procedures.

Brain Death: Concept

• Brain death is defined as the irreversible cessation of all functions of the brain, including the brainstem.
• It is legally recognised as death, particularly for the purpose of organ donation and transplantation.

Apnea Test

• The apnea test is a clinical bedside procedure used to assess brainstem function, specifically the respiratory drive.
• It evaluates whether the patient initiates spontaneous breathing in response to elevated carbon dioxide levels.
• Limitations of Apnea Test
  • The procedure may compromise oxygenation and cerebral perfusion, potentially aggravating neurological injury.
  • Concerns have been raised that it should not be employed as the sole determinant of brain death.
• Ancillary (Confirmatory) Tests
  • Electroencephalogram (EEG): Assesses electrical activity of the brain.
  • Cerebral Angiography: Evaluates cerebral blood flow.
  • CT / Radionuclide Angiography: Detects absence of intracranial circulation.
  • These tests provide objective confirmation of brain death, supplementing clinical evaluation.