Video: Finland is testing a system to monitor undersea cables in the Baltic Sea
The Finnish Border Guard is testing new equipment to monitor the condition of undersea cables in the Baltic Sea. The new technology is designed to detect potential damage, threats, and other risks to critical undersea infrastructure in a timely manner. Finnish officials note that such systems are expected to enhance the security of cable networks and help respond more quickly to potential incidents.
The technology is based on the distributed acoustic sensing method, in which a fiber-optic cable detects and measures abnormal vibrations on the seabed.
Finnish border guards posted a video of the tests on social media platform X.
Rajavartiolaitos, together with the Navy and several companies, has tested a new method based on acoustic detection that can identify threats approaching undersea cables.
Read more in our press release. ⬇️https://t.co/gYwNczUhrR pic.twitter.com/IaaNoAzRDD— Finnish Border Guard (@rajavartijat) June 5, 2026
It is noted that over the past few years, Finnish authorities have faced a series of incidents involving damage to data and power transmission cables laid along the bottom of the Baltic Sea. It is suspected that some of these incidents may have been the result of deliberate actions by ship crews.
The most recent incident occurred late last year, when authorities suspected the cargo ship Fitburg of being involved in the deliberate damage of an undersea communications cable in the Baltic Sea on New Year’s Eve.
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