The true measure of a modern air defence network goes beyond its ability to shoot down targets; it hinges on how efficiently it manages its interceptor stockpiles.
Procuring an endless supply of long-range surface-to-air missiles (SAMs) is neither practical nor financially viable.
Instead, a robust layered architecture is required so that high-cost interceptors are reserved for major threats, while more affordable countermeasures deal with cheap drones and lower-tier targets.
India’s recent operational history, particularly during Operation Sindoor, highlights the effectiveness of this multi-tiered approach. Official reports noted that incoming drone and missile strikes were neutralized by a highly integrated grid of overlapping defence systems.
The Indian Air Force’s Integrated Air Command and Control System (IACCS), functioning alongside the Army's newly inducted AI-enabled Akashteer system—developed by Bharat Electronics Limited—provided the critical command-and-control backbone.
Independent analyses confirm that this network successfully synchronized assets ranging from the S-400, Medium-Range Surface-to-Air Missile (MRSAM), Akash, and Spyder, to traditional anti-aircraft guns.
Stress-Testing with a Gulf-Scale Barrage
To understand the immense pressure of a modern saturation attack, a recent Gulf scenario serves as an excellent stress test.Based on reported figures from the UAE and Saudi Arabia, a combined barrage consisted of roughly 3,713 aerial threats. This included at least 623 ballistic missiles, 35 cruise missiles, and well over 2,000 drones.
If an air defence system aims for a 90% success rate, it must eliminate approximately 3,342 of these threats.
However, this mathematical reality does not mean a nation should stockpile over 3,000 expensive SAMs. Such an approach would be a strategic miscalculation.
The High-End Threat: Ballistic Missiles
Ballistic missiles remain the most challenging targets to intercept. At a 90% interception requirement, stopping 623 ballistic missiles would require 561 successful hits.Factoring in missed shots and the necessity to fire multiple interceptors at a single fast-moving target, the actual expenditure easily rises to between 623 and 690 missiles.
If military doctrine dictates firing two interceptors per high-threat track to ensure a kill, the requirement leaps to 1,200–1,400 interceptors.
This is the exact domain where the advanced S-400 and India's upcoming indigenous Project Kusha are critical.
Developed by the Defence Research and Development Organisation (DRDO), Project Kusha is expected to provide an interception range of up to 350–400 km.
These elite systems must not be wasted on drones; their limited magazines must be strictly reserved for ballistic missiles, high-value aircraft, and heavy stand-off weapons.
The Low-Altitude Threat: Cruise Missiles
While cruise missiles appear in smaller numbers in this scenario (35 reported), their low-altitude flight paths and ability to hide behind terrain make them notoriously difficult to track.Defeating them at a 90% rate equates to about 32 successful interceptions. To guarantee this, planners might allocate 40 to 60 medium- or long-range SAMs.
Systems like the MRSAM and Akash are incredibly valuable in this layer. They provide critical follow-up engagement opportunities in cases where long-range systems fail to intercept, or intentionally allow a target to enter a closer defensive ring.
The Drone Problem Requires a Different Solution
Drones flip the traditional air defence economic model on its head. Facing a swarm of over 2,250 drones—as seen in the UAE figures—requires over 2,000 successful engagements.Firing standard SAMs at them would rapidly bankrupt an arsenal, potentially consuming over 4,000 weapons if a two-shot doctrine is used.
Consequently, the lowest tier of the defence network must rely on high-volume, low-cost solutions. This includes rapid-fire anti-aircraft guns, electronic warfare (EW) jammers, dedicated counter-drone interceptors, and highly affordable short-range missiles.
India’s success during Operation Sindoor validates this doctrine, as official accounts highlighted how relatively inexpensive legacy guns and portable systems were highly effective at clearing the skies of smaller drones.
A Hypothetical Architecture for India
If India were forced to defend against a swarm of 3,700 diverse threats, the defensive inventory would require a highly structured distribution:- Long-Range Layer (S-400 / Project Kusha): 700 to 1,000 interceptors dedicated exclusively to ballistic missiles and advanced combat aircraft.
- Medium-Range Layer (MRSAM): 500 to 800 interceptors tasked with destroying cruise missiles, jets, and large unmanned aerial vehicles (UAVs).
- Short-Range Layer (Akash / Akash-NG): 800 to 1,200 interceptors targeting cruise missiles and mid-sized drones that slip past outer defences.
- Terminal Defence (Guns / EW / Counter-UAS): Thousands of rounds and electronic jamming capabilities to handle the sheer volume of small drones and saturation strikes.
The Command-and-Control Imperative
Because multiple layers often engage the same target, a unified digital brain is just as important as the missiles themselves.India’s IACCS and the Army’s newly deployed Akashteer system are designed specifically to merge radar data and assign the right weapon to the right target in milliseconds.
The ultimate lesson from massive modern drone and missile barrages is that relying solely on heavy, expensive missiles is a losing strategy.
Even an impressive 90% kill rate against 3,700 targets means over 300 threats will still hit their marks.
True security lies in a deeply integrated, multi-layered shield—combining the S-400, Project Kusha, MRSAM, Akash, and terminal gun systems—all fused together by advanced networks.
A multi-crore missile should never be fired at a cheap drone when a basic anti-aircraft gun or electronic jammer can finish the job
