What China unveiled and what the robot reportedly achieved
China has unveiled a soft-body bionic manta ray submersible that can detect simulated underwater explosive devices in dark waters with extremely low visibility. A report carried by CCTV News said the robotic submersible identified and locked onto targets in conditions where visibility was less than one meter.
The key point is not only movement, but sensing. In deep or murky waters, cameras become almost useless because light does not travel far. That is why sonar-based detection is central to underwater navigation and threat identification.
According to the description, the system uses forward-looking sonar to locate objects in darkness and side-scan sonar to map the seabed. It then transmits real-time data to command terminals. If these functions work reliably, they can support tasks like underwater inspection, seabed mapping, and identifying suspicious objects near ports and sea lanes.
Why the manta ray design matters: stable motion for sensitive sensors
Researchers reportedly based the design on a manta ray because of its unique swimming motion. Unlike many fish that move side-to-side, manta rays propel themselves forward with wave-like movements of their wide fins while keeping their bodies relatively stable.
This stability matters for carrying complex equipment. Sonar and navigation sensors work better when vibrations are minimized and the platform does not wobble. A steadier body can produce cleaner sonar data, which is important when detecting small objects on the seabed.
A soft-body bionic shape can also offer advantages in manoeuvrability and stealth. A smooth swimming motion may reduce noise compared to traditional propellers, making detection harder in some situations. In simple terms, the manta ray body plan is not just “biomimicry for looks.” It is an engineering choice that can support sensitive sensing systems.
Endurance, pressure resistance, and autonomous navigation
The submersible is described as having long endurance. Its batteries can reportedly support full-speed operations for dozens of hours and travel over hundreds of kilometres. When it glides by adjusting buoyancy, its operational range is said to extend to thousands of kilometres.
This matters because underwater missions often require long patrol times. A system that combines active swimming with energy-saving gliding can cover wider areas without frequent recovery and recharging.
Engineers also designed it to withstand extreme underwater pressure. The high-pressure-resistant hull is reported to protect core equipment in deep-sea conditions equivalent to around 200 atmospheres. High pressure is a major barrier in deep-sea robotics, so pressure resistance can expand where the system can operate.
Autonomy is another highlighted feature. Even if communication cables are cut, the robot can reportedly navigate on its own and approach its target without losing direction. Underwater communication is difficult, so stronger autonomy can increase reliability in real conditions.
Swarm operation and sonar networking: how multiple units could cooperate
The system can also operate in groups. Multiple robotic manta rays can reportedly form a sonar network, relay signals, and extend detection coverage beyond what one unit can deliver.
A distributed sonar network can improve detection in complex environments. If seabed features block signals or create clutter, another unit positioned differently may still pick up useful information. Swarm operation also adds redundancy. If one unit fails, others can continue the mission.
The report also mentions converting satellite communication into sonar signals that reach deep into the ocean. The broader idea is to bridge the communication gap between surface systems and deep underwater units, which is a known challenge in underwater operations.
What it could be used for and why it matters for future naval missions
A Chinese military analyst, Zhang Junshe, said the technology offers strong survivability, navigation, and detection capabilities. He suggested that stealth and pressure resistance could make it valuable for future naval missions, including detecting submarines and monitoring high-risk underwater environments.
From a wider view, this kind of bionic robot sits at the intersection of sensing, autonomy, and endurance. If it can operate quietly for long periods, transmit usable sonar data, and coordinate with other units, it becomes a tool for wide-area monitoring rather than only short inspections.
Real-world impact will depend on performance under changing water conditions, seabed clutter, and noise. Still, the direction is clear: underwater robotics is moving toward lifelike designs, deeper operating limits, and greater autonomy. As more countries invest in similar systems, the underwater domain will likely see more surveillance and a stronger focus on protecting critical sea infrastructure and sea lanes.
