AI-designed drone vanishes by spinning in place

A Chinese underwater drone, designed by artificial intelligence, uses an unprecedented camouflage technique: it becomes undetectable by spinning on itself. This breakthrough relies on an AI capable of optimizing the reflection of sound waves in real time to deceive sonars.

Dynamic camouflage, not just visual

Conventional camouflage systems are limited to static patterns or adaptive screens. Here, researchers from China’s National University of Defense Technology have developed a drone whose surface reflects sonar waves to mimic the marine environment. When spinning, this reflection becomes chaotic, making the device invisible to active sonars, which are used to detect submarines or underwater cables.

The AI adjusts the acoustic properties of the hull in real time based on received signals. This approach is inspired by research on world models—models capable of simulating and interacting with a 3D physical environment, a path explored by figures like Fei-Fei Li at Stanford.

A threat to critical infrastructure

This drone is not just a lab curiosity. In an article published in Science and Technology Daily on August 11, 2026, the researchers highlight its potential to attack underwater cables, which carry 99% of global internet traffic. More than 600 cables are currently in operation, and their vulnerability is already documented: deliberate cuts have been observed in the past, often linked to geopolitical tensions.

The drones’ autonomy, combined with their stealth, makes them particularly formidable. Capable of operating without data emissions for weeks, they could swarm, paired with underwater or aerial sensors, for sabotage or covert surveillance missions.

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Reactions and strategic stakes

China is not the only country working on such technologies. The Aukus alliance (Australia, UK, US) is also developing underwater drones to protect cables, an initiative criticized by Chinese researchers, who see it as an attempt to "create a surveillance network to gain strategic military advantages." Marseille, with its internet hub and the 2Africa cable, thus becomes a critical point to defend.

In France, the Direction générale de l’armement (DGA) ordered twelve autonomous drones (surface and underwater) in July 2026 to strengthen mine countermeasures. These drones, developed under the SLAM-F program with Thales and ECA, aim to detect and neutralize underwater threats without exposing crews.

If this Chinese breakthrough confirms that camouflage now extends beyond the visual, it also raises a question: how far can AI push the limits of stealth? Between military applications and infrastructure protection, the race for autonomous, undetectable drones is just beginning.