Defence Technology & Ballistics15 Concepts & Facts

DRDO Missiles & Defense Technology GK Questions & Answers

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The Defence Research and Development Organisation was established in 1958 under the Ministry of Defence, with headquarters in New Delhi, formed through the amalgamation of the Technical Development Establishment, the Directorate of Technical Development and Production, and the Defence Science Organisation. India's guided missile capability achieved strategic focus in 1983 with the launch of the Integrated Guided Missile Development Programme, chaired by Dr. A.P.J. Abdul Kalam. The government sanctioned the indigenous development of five foundational missile systems: Prithvi (surface-to-surface short-range ballistic missile), Agni (surface-to-surface strategic ballistic missile technology demonstrator), Trishul (short-range surface-to-air missile), Akash (medium-range surface-to-air missile), and Nag (third-generation anti-tank guided missile), establishing indigenous defense production infrastructure.

Technologically, these systems utilize diverse propulsion, aerodynamic, and guidance principles. Prithvi relies on storable liquid-propellant engines, whereas Akash utilizes an air-breathing solid-fuel ramjet propulsion system paired with the indigenous Rajendra multi-function phased-array radar. Nag operates as a fire-and-forget weapon employing an Imaging Infrared seeker and a tandem High-Explosive Anti-Tank warhead, fielded via the tracked NAMICA carrier and helicopter-launched HELINA or Dhruvastra variants. In supersonic cruise technology, BrahMos Aerospace—a joint venture formed by DRDO and Russia's NPO Mashinostroyeniya—developed the BrahMos missile, capable of velocities between Mach 2.8 and 3.0. Equipped with a solid propellant booster and liquid ramjet second stage, BrahMos achieves precision strikes from land mobile launchers, naval destroyers, submarines, and modified Sukhoi Su-30MKI fighter aircraft.

Strategic deterrence consolidated with the Agni ballistic missile series, culminating in Agni-V, a three-stage solid-fuel, canisterized Intercontinental Ballistic Missile with an operational range exceeding 5,000 kilometres. In March 2024, DRDO executed Mission Divyastra, successfully testing Agni-V equipped with Multiple Independently Targetable Re-entry Vehicle technology. Parallelly, DRDO deployed a two-tier Ballistic Missile Defence shield: Prithvi Air Defence for exo-atmospheric interceptions above 50 kilometres, and Advanced Air Defence for endo-atmospheric interceptions below 30 kilometres. Missile classifications, propulsion chemistry, radar tracking networks, and strategic defense doctrines constitute core areas tested in UPSC CSE General Studies Paper III (Internal Security and Defence), CDS, CAPF, and SSC CGL examinations.

Key Concepts & Self-Assessment15 Key Facts

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The Integrated Guided Missile Development Programme (IGMDP), sanctioned in 1983 under Dr. A.P.J. Abdul Kalam, developed five missile systems: Prithvi (SSBM), Agni (IRBM/ICBM), Trishul (SRSAM), Nag (ATGM), and Akash (MRSAM).

Agni-V is a three-stage solid-fuel Intercontinental Ballistic Missile (ICBM) with an operational range exceeding 5,000 km, successfully tested with Multiple Independently Targetable Re-entry Vehicles (MIRVs) in March 2024 under Mission Divyastra.

BrahMos is a two-stage supersonic cruise missile (Mach 2.8–3.0) developed jointly by DRDO and Russia's NPO Mashinostroyeniya, capable of universal launch from land, air, ships, and submarines.

India's Ballistic Missile Defence (BMD) network incorporates a two-layer interception architecture: Prithvi Air Defence (PAD) for exo-atmospheric threats (above 50 km) and Advanced Air Defence (AAD) for endo-atmospheric threats (below 30 km).

Nag is a fire-and-forget anti-tank guided missile with a tandem HEAT warhead, operating via imaging infrared (IIR) guidance with dedicated carrier variants including NAMICA (tracked) and HELINA/Dhruvastra (air-launched from HAL Dhruv/Prachand).

The Defence Research and Development Organisation was established in 1958 by merging the Technical Development Establishment and the Directorate of Technical Development and Production.

Prithvi-I was India's first indigenously developed surface-to-surface ballistic missile under IGMDP, successfully test-fired on February 25, 1988 with a 150 km range.

Akash is a medium-range surface-to-air missile system powered by an integral ramjet-rocket propulsion system, capable of engaging multiple aerial targets up to 25 km.

Astra is an indigenously developed Beyond Visual Range air-to-air missile powered by a smokeless solid fuel motor, integrated into Sukhoi-30MKI and Tejas fighters.

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Pralay is a canisterized short-range surface-to-surface quasi-ballistic missile with a strike range of 150 to 500 km, designed to defeat interceptor air defense systems.

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K-4 and K-15 (Sagarika) are submarine-launched ballistic missiles developed by DRDO to arm the Arihant-class nuclear-powered ballistic missile submarines.

#12

Pinaka is an indigenous multi-barrel rocket launcher system developed by ARDE Pune, firing a salvo of 12 high-explosive rockets in 44 seconds over 40 km.

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DRDO developed the Netra Airborne Early Warning and Control system, mounted on Embraer ERJ-145 aircraft to provide 240-degree radar surveillance coverage.

#14

Quick Reaction Surface-to-Air Missile is an all-weather canister-based mobile air defense system with solid propellant engines developed for the Indian Army strike corps.

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The Integrated Test Range at Dr. Abdul Kalam Island off the coast of Odisha serves as India's primary offshore missile testing facility.

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Educator's Insight

India's indigenous missile capabilities originated under the Integrated Guided Missile Development Programme, started in 1983 under Dr. A.P.J. Abdul Kalam at the Defence Research and Development Organisation. This project developed five core defense missiles: Prithvi, Agni, Trishul, Nag, and Akash. Today, India deploys advanced strategic systems, including the solid-fueled intercontinental Agni-V missile, the supersonic BrahMos cruise missile developed with Russia, and a multi-layered ballistic missile defense shield intercepting both exo-atmospheric and endo-atmospheric threats.

For competitive exams like UPSC, CDS, and AFCAT, examiners frequently test missile categories and operational guidance. Use the memory acronym "PATNA" to recall the original IGMDP missiles: Prithvi (surface-to-surface), Agni (ballistic), Trishul (short-range surface-to-air), Nag (anti-tank), and Akash (surface-to-air). A common question trap confuses missile trajectories; cruise missiles like BrahMos fly within the atmosphere, whereas ballistic missiles like Agni follow sub-orbital arcs. For revision, remember that Mission Divyastra (2024) successfully flight-tested Agni-V with multiple independently targetable re-entry vehicles.

DRDO Missiles & Defense Technology GK Questions & Answers

Key Concepts & Self-Assessment15 Key Facts

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