China has raised concerns over what it describes as
expanding underwater intelligence operations allegedly carried out by foreign
actors along its coastline. Authorities claim that new surveillance methods are
being deployed beneath the surface to gather strategic marine data that could
be used for military and security assessments.
According to China’s Ministry of State Security, a range of
unconventional tools has been identified in coastal waters. These include
biologically integrated tracking systems involving large sea animals fitted
with monitoring devices. The ministry alleges that such animals have been
observed collecting and transmitting environmental data such as water
temperature, salinity levels, and ocean current patterns to external recipients
through satellite links.
Beyond marine life-based tracking systems, officials also
pointed to the use of autonomous ocean devices and infrastructure-based
surveillance tools. These reportedly include wave-powered gliders, advanced
sensor buoys, and equipment mounted on commercial vessels capable of monitoring
port activity in real time. The ministry did not attribute these activities to
any specific country or agency.
Chinese authorities argue that the information gathered
through these systems could be compiled into detailed underwater terrain
models. Such maps, they warn, may reveal vulnerabilities in coastal defense
structures and maritime infrastructure, potentially creating risks for national
security planning.
In response, security officials have called for stricter
inspection protocols on imported maritime equipment and enhanced vigilance
among coastal communities. Fishermen and maritime workers have been encouraged
to report unfamiliar or suspicious devices discovered at sea, particularly
buoys or sensor-equipped objects that appear out of place.
The warning comes amid long-standing mutual accusations of
espionage between China and Western governments. Intelligence tensions have
continued to escalate through overlapping claims of covert surveillance
activities across cyber, human intelligence, and maritime domains.
Recent developments in this broader context include warnings
issued within China about recruitment-based deception tactics targeting
officials, as well as public statements from a Western intelligence alliance
alleging that Chinese operatives have attempted to gather sensitive information
through online professional networking channels.
The situation highlights an increasingly complex intelligence environment where maritime technology, artificial intelligence, and remote sensing systems are becoming central tools in global security competition.

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