China's Ultra-Large Underwater Drones: Strategic Purpose and International Concerns

China has developed the world's largest unmanned submersibles, with models such as the HSU001 and AJX002 showcased during a military parade last year, measuring nearly 20 meters (66 feet) in length. Additionally, satellite imagery has identified a classified variant exceeding 40 meters at a naval installation, leading to heightened international scrutiny, particularly from the United States. These advancements have resulted in a new classification of drones known as extra-extra-large uncrewed underwater vehicles (XXLUUVs), which significantly surpass the size of the United States' largest unmanned underwater vehicle, the 15-meter Orca.

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Yan Zheping, a prominent authority on submersibles and director of unmanned systems at Harbin Engineering University, has clarified the strategic intent behind these ultra-large models. In a peer-reviewed paper published in the Chinese Journal of Ship Research, Yan stated that these vessels are designed to "prioritize regional security and near-coast defensive reconnaissance while simultaneously supporting civilian research and environmental monitoring." This assertion aims to address international concerns regarding the potential military applications of these drones.

South China Morning Post

The emergence of China's ultra-large underwater drones has prompted significant alarm among U.S. defense experts, who have issued stark warnings about potential vulnerabilities along the West Coast. Analysts have identified key locations such as Seattle, Oakland, Los Angeles, and the Panama Canal as possible targets for these advanced unmanned systems. The implications of these developments raise questions about maritime security and the balance of power in the Pacific region.

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Critics argue that the expansion of China's underwater drone capabilities could destabilize regional security dynamics and provoke an arms race in underwater warfare technology. The U.S. and its allies may feel compelled to enhance their own underwater capabilities in response, potentially leading to increased tensions in the region.

South China Morning Post

In response to the concerns raised, Yan Zheping emphasized that the primary focus of China's underwater drones is not offensive military action but rather regional security and environmental monitoring. This statement seeks to mitigate fears surrounding the potential military use of these advanced technologies.

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While U.S. analysts express concerns about the military implications of China's underwater drones, there is a lack of consensus on the specific capabilities and intended uses of these vessels. Some reports suggest a focus on civilian applications, while others highlight their potential military applications, indicating a need for further clarification from Chinese authorities.

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• “prioritise regional security and near-coast defensive reconnaissance while simultaneously supporting civilian research and environmental monitoring” — Yan Zheping, Director of Unmanned Systems, Harbin Engineering University

South China Morning Post

This article outlines the development and strategic purpose of China's ultra-large underwater drones, highlighting both the international concerns they raise and the official responses aimed at clarifying their intended use.

South China Morning Post