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NATO Says Baltic Sentry Helped Slash Russian Undersea Infrastructure Sabotage, Cut Response Time to One Hour

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Patrol ship HMS Carlskrona, on open water near Karlskrona, Sweden, as part of the NATO Baltic Sea patrol mission, the Baltic Sentry, on February 4, 2025. (Source: Getty Images)
Patrol ship HMS Carlskrona, on open water near Karlskrona, Sweden, as part of the NATO Baltic Sea patrol mission, the Baltic Sentry, on February 4, 2025. (Source: Getty Images)

NATO and allied forces recorded a significant reduction in malicious sabotage against critical undersea infrastructure in the Baltic Sea between January 2025 and January 2026, and reduced response times to suspicious incidents from 17 hours to just one hour.

The comments came ahead of the Ukraine Defense Contact Group (UDCG) , also known as the Ramstein Group, according to UNITED24 Media correspondents on June 18.

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The figures signal that the alliance's deterrence of hybrid attacks on the cables and pipelines carrying the Baltic's internet traffic and energy is holding, and that the campaign is squeezing Russia's already-strained surface fleet.

Lieutenant Commander Tim Pietrack, chief public affairs officer at NATO's Allied Maritime Command, tied the results to Baltic Sentry , NATO's mission to patrol and protect the region's seabed.

"At the end of the day, Baltic Sentry demonstrates that Allies have the political will and operational capabilities to sustain a crucial collective defense capability for the Baltic Sea and beyond," he declared.

Enforcement at sea has intensified in parallel. "We've seen 12 boardings under national authorities by allied nations in the past year," another NATO military official noted, adding that the pressure is forcing Moscow to commit warships to escort its sanctioned tankers.

That burden is reshaping Russian deployments. The same official explained that Russia is having to escort the aging vessels of its so-called shadow fleet, which "is creating a force flow issue for an already strained Russian surface fleet," he added.

Ships from the Northern Fleet are being pushed into areas such as the English Channel and the wider Atlantic to cover that shipping, the official added.

Baltic Sentry was launched after a series of suspicious incidents involving communication and energy cables in the Baltic Sea, with allied warships and aircraft monitoring critical sectors of the seabed.

Allied governments have also moved to harden the legal regime protecting the cables themselves. The United Kingdom is preparing tougher penalties, including possible prison terms, for ship owners and operators whose negligence damages subsea internet cables.

The measures form part of a wider effort to shield infrastructure that carries more than 99% of the country's international internet traffic and underpins trillions of dollars in daily financial transactions.

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The Ukraine Defense Contact Group is a coalition of countries coordinating military aid, training, and defense support for Ukraine.

Baltic Sentry is NATO’s Baltic Sea operation to protect critical undersea infrastructure and respond quickly to suspicious maritime activity.

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