Risk register · entry
Q3 · EngineeredBaltic Sea cable cuts
Ships dragging anchors severed telecom and power cables between states.
Tightly coupled systems where one small fault cascades and takes down the whole machine.
Why this room
The physical mechanism, an anchor scraping a seabed, is a simple, low-tail-risk engineered fault that was previously routine and insurable, but once state actors realized the same act could produce complex, hard-to-attribute geopolitical leverage with near-zero legal exposure, the payoff structure flipped from linear repair cost to a fat-tailed instrument of hybrid warfare, pulling the event from Q3 Engineered toward a geopolitical tail risk.
The record
- Eagle S dragged its anchor approximately 56 miles / 90 km across the seabed on December 25, 2024certain
- Eagle S damaged the Estlink 2 power cable plus four subsea data cables (some sources say five cables total)likely
- Estlink 2 capacity fell from 1,016 MW to 358 MW after the cutcertain
- Total repair/damage cost from the Eagle S incident estimated at roughly €60 million (~$69.7 million)likely
- Estlink 2 and associated cable repairs completed mid-2025 (sources vary between June and August 2025)uncertain
- Yi Peng 3 dragged an anchor roughly 100 miles across the seabed on November 17-18, 2024, severing the BCS East-West Interlink and C-Lion1 cablescertain
- Helsinki District Court dismissed the case against Eagle S captain and two officers on October 3, 2025, citing lack of jurisdictioncertain
- Roughly 200 subsea cable faults occur worldwide each year, most from anchors and fishing gear (baseline/industry figure)likely
- NATO launched the Baltic Sentry patrol mission in January 2025; EU published a Cable Security Action Plan in February 2025certain
Sources
The book
This entry is one of 111 in the register. The full story, and what it cost the people who lived it, is in Risky Business by Claudia Zeisberger, David Munro and Joanna Reijgersberg-Siew.
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