How do multi-layered air defence systems enhance a nation's security architecture? Discuss with reference to India's current missile defence capabilities.

Q. How do multi-layered air defence systems enhance a nation's security architecture? Discuss with reference to India's current missile defence capabilities. (15 marks, 250 words)

A multi-layered air defence system stacks overlapping interceptors across different ranges and altitudes so that a threat leaking through one layer is engaged by the next. For India, facing a two-front aerial threat, such a shield built indigenously is central to credible deterrence and strategic autonomy.

How layering strengthens the security architecture - Defence-in-depth: long-, medium- and short-range layers offer repeated interception chances, eliminating single-point failure and raising kill probability. - Threat versatility: overlapping layers counter a diverse spectrum—ballistic and cruise missiles, fighter jets, UAVs and saturation drone swarms. - Deterrence value: a dense, survivable shield raises the cost of a first strike and protects critical assets and population centres. - Redundancy & survivability: distributed radars and command-and-control resist jamming and decapitation, sustaining the network under attack. - Strategic autonomy: indigenous layers reduce import dependence under Atmanirbhar Bharat.

India's current missile-defence layers - Long-range: the imported S-400 (≈400 km), now complemented by DRDO's indigenous 'Kusha' LR-SAM, maiden flight-tested on 23 July 2026 off Odisha against a high-speed, high-altitude target [1]; sanctioned by the CCS with three interceptor variants and phased induction by 2028–2030 [2]. - Medium-range: indigenous Akash / Akash-NG, combat-proven and widely inducted [3]. - Short-range/terminal: QRSAM and the Ballistic Missile Defence programme (PAD, AAD).

Together these layers convert scattered assets into an integrated shield. Deepening indigenous R&D and networked command-and-control will make India's counter-air architecture both self-reliant and resilient.

(~250 words)

Sources: 1. DRDO conducts successful maiden flight-test of 'Kusha' LR-SAM (PIB, 23 Jul 2026) — Kusha maiden test, site, target, indigenous system elements, import-dependence reduction 2. DRDO news/documents — Project Kusha (CCS sanction, variants, induction timeline) — CCS approval, three interceptor variants, 2028–2030 phased induction 3. DRDO flight-test of New Generation Akash missile (PIB) — indigenous medium-range SAM layer, Akash/Akash-NG capability