The Drone Equation: Proportional Response to the UAS Threat

A C-UAS system developed by Saab to be a modular and mobile platform. (Image: Saab)

May 1, 2026

Saab, Linköping, Sweden

Countering drones (C-UAS - Counter Uncrewed Aerial Systems) presents a challenge across military and civilian domains. UAS vary widely in class, capability, and design - no single countermeasure addresses all threat types.

When precision interceptors designed for supersonic missiles become the default answer to slow-moving quadcopters, defenders face a capability mismatch that cannot scale. This is the drone equation: matching the right effector to the right threat.

Effective C-UAS must counter the full spectrum with proportional, cost-effective responses at every tier through layered, integrated defense architecture.

The chart shows the North Atlantic Treaty Organization’s (NATO’s) standard classifications for drones. (Image: NATO)

Why Layered Defense Matters in C-UAS

Drones do not follow predictable patterns. They can fly high and fast or low and slow with minimal radar signatures, attacking individually or in swarms from kilometers away or at the fence line.

This operational flexibility demands layered defense architecture. Each tier provides coverage at increasing range - from perimeter detection to point defense, ensuring no gaps in protection. Modular, scalable integration allows commanders to adapt effector deployment as the threat landscape evolves.

Layered Defense: The System-of-Systems Solution

Effective counter-UAS operates through integrated layers, forcing attackers to expend resources whilst defenders neutralize threats efficiently at each stage.

This requires three components working through open architecture and unified command: sensors that detect and classify, command and control that orchestrates response, and effectors tailored to threat profiles.

The architecture for a layered C-UAS defense system. (Image: Saab)

Multi-Sensor Fusion: The Common Operating Picture

Advanced radar systems provide persistent surveillance, detecting slow-moving drones to high-speed munitions. The system must instantly classify targets, distinguishing hostile drones from birds or civilian aircraft.

Sensor fusion integrates multiple detection systems (radar, electro-optical sensors) into a unified operational picture. This interoperable approach ensures comprehensive coverage whilst reducing false positives.

AI-Enabled Command and Control

The graphic shows the challenges encountered by traditional radar-based air defense systems tracking small drones. (Image: Saab)

Modern C2 platforms leverage AI to handle the ‘Observe’ and ‘Orient’ phases of the OODA loop automatically, filtering clutter and prioritizing threats. Operators focus on high-stakes decisions whilst AI manages routine classification.

The C2 layer benefits from being platform-agnostic and interoperable. Open architecture and standardized interfaces enable best-of-integration across multinational defense ecosystems without vendor lock-in, ensuring forces adapt rapidly as new technologies emerge.

Proportional Response: Matching Effector to Threat

Soft-Kill: Electronic Warfare (EW) jams control signals or uses high-powered microwave to disable electronics. Reusable, engaging multiple targets simultaneously, EW provides rapid, scalable response against mass drone threats including coordinated swarms.

However, EW faces limitations against modern autonomous UAS capable of GPS-guided or pre-programmed flight that no longer rely on continuous data links. This drives the need for layered complementary capabilities.

Hard-Kill: Kinetic Effectors use programmable proximity ammunition, precisely timed airbursts that neutralize targets without requiring direct hits. This provides high probability of kill against agile threats whilst offering rapid engagement capability and magazine depth for sustained operations.

Conventional Air Defense Systems address cruise missiles and manned aircraft, where advanced interceptors provide the speed, range, and precision needed for high-performance airborne threats.

The power lies in proportionality: Modern surface-to-air missiles are precision weapons optimized for high-value, high-speed threats. A commercial quadcopter gets jammed. A loitering munition or military-grade drone gets intercepted by proximity burst. A cruise missile gets engaged by dedicated air defense.

Each threat receives the appropriate capability preserving high-end effectors for scenarios that demand them whilst maintaining effective coverage across the threat spectrum.

Static defense is obsolete. Effective C-UAS must be modular, enabling rapid integration of new capabilities, and mobile, allowing commanders to redeploy as threats evolve.

During NATO’s 2025 Poland mission, a rapidly deployed C-UAS system integrated seamlessly into existing air defense networks, supporting multi-domain operations across allied forces. This demonstrates platform-agnostic systems that leverage existing investments and maintain coalition interoperability through standardized interfaces.

The technology exists. The architecture is proven. When small, agile drones dominate the battlespace, the answer is not single-solution approaches. It is smarter integration, proportional response, and layered defense architecture that maintains operational effectiveness across the full threat spectrum.

This article was provided by Saab. For more information, visit here .