General Studies 2021 GS Paper III 10 marks 150 words Compulsory How

Q5

How is S-400 air defence system technically superior to any other system presently available in the world? (Answer in 150 words)

हिंदी में प्रश्न पढ़ें

S-400 हवाई रक्षा प्रणाली, विश्व में इस समय उपलब्ध अन्य किसी प्रणाली की तुलना में किस प्रकार से तकनीकी रूप से श्रेष्ठ है ? (150 शब्दों में उत्तर दीजिए)

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Directive word: How

This question asks you to how. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.

See our UPSC directive words guide for a full breakdown of how to respond to each command word.

How this answer will be evaluated

Approach

The directive 'How' demands a technical explanation of superiority mechanisms. Structure: Brief intro identifying S-400 as Russian surface-to-air missile system → Body explaining layered defence architecture, multi-target engagement, radar capabilities, and missile range spectrum → Conclusion linking to India's strategic context (China-Pakistan deterrence) in 1-2 lines.

Key points expected

Layered defence architecture: four distinct missile types (40N6E, 48N6E3, 9M96E2, 9M96E) covering 40-400 km range spectrum
Multi-target engagement capability: tracking 300+ targets simultaneously, engaging 36 targets with 72 missiles
Advanced radar systems: 91N6E panoramic radar, 96L6E acquisition radar, 92N6E fire control radar with anti-stealth features
Mobility and deployment: 5-minute deployment time, road-mobile TELs, network-centric warfare compatibility
Comparison edge over Patriot PAC-3 (US) and HQ-9 (China): superior range, layered approach, and integrated command systems
India-specific relevance: deployed along China-Pakistan borders, CAATSA waiver context, indigenous alternatives like Project Kusha

Evaluation rubric

Dimension	Weight	Max marks	Excellent	Average	Poor
Demand-directive understanding	20%	2	Answer explicitly addresses 'technical superiority' through comparative technical parameters (range, radar bands, missile velocity, target discrimination algorithms) rather than generic description; distinguishes 'how' from 'what' by explaining mechanism of superiority, not merely listing features	Lists technical features without explicit comparative framing; partially addresses superiority but mixes descriptive elements without clear technical distinction mechanism	Describes S-400 generally without addressing superiority; confuses with other systems (S-300, Patriot); fails to interpret 'how' directive, treating it as 'what'
Content depth & accuracy	20%	2	Accurate specifications: 400 km max range (40N6E), 30 km altitude ceiling, L/X/S-band radar integration, hypersonic target interception (Mach 14); correctly identifies 92N6E Grave Stone radar and 91N6E Big Bird radar functions; no confusion with S-500 or THAAD	Broadly correct range figures (±50 km error acceptable) and basic layered concept; minor inaccuracies in radar nomenclature or missile variants; conflates engagement capacity with tracking capacity	Significant technical errors: claims 600+ km range (S-500 feature), confuses S-400 with ballistic missile defence, incorrect deployment timeline for India (2018 vs 2021-2023), or misidentifies origin/country
Structure & flow	20%	2	Logical progression: system identification → layered missile architecture → radar/sensor integration → engagement mechanics → comparative edge → India relevance; tight 150-word adherence with no redundancy; each sentence advances technical argument	Recognizable intro-body-conclusion but uneven weighting (over-detailed on history, compressed on technical specs); some repetition or disjointed transitions between radar and missile sections	No discernible structure; random fact aggregation; exceeds word limit significantly or severely underwrites; conclusion absent or purely decorative; chronological or alphabetical listing without analytical flow
Examples / case-law / data	20%	2	Precise quantitative data: 300 targets tracked/36 engaged simultaneously, 5-minute deployment, 40-400 km range bands; cites India deployment locations (Pathankot, Punjab sector); contrasts with Patriot PAC-3's 160 km range or HQ-9's 200 km limitation	Round-number approximations (300 targets, 400 km range) without specific missile variant names; generic comparison to 'Western systems' without naming; mentions India procurement without deployment specifics	No quantitative anchors; vague superlatives ('longest range', 'most advanced'); irrelevant examples (Syrian operations, Ukraine war unless specified for combat validation); no India-specific grounding
Conclusion & analytical edge	20%	2	Synthesizes technical superiority into strategic value for India: anti-access/area denial against Chinese J-20 stealth, layered defence against Pakistan cruise missiles; acknowledges limitations (vulnerable to saturation attacks, no BMD capability against Agni-class) or CAATSA implications in 1-2 crisp lines	Generic strategic importance statement ('boosts India's defence'); no critical limitation mentioned; or purely technical summary without strategic synthesis	No conclusion; abrupt ending on technical specs; irrelevant digression (Russia-Ukraine war, cost debates); or exaggerated claims ('invincible shield', 'game-changer' without qualification)

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