# NATO caught Russia rehearsing a cable kill

> Russian submarines practiced cutting Arctic data lines with a device built to leave no fingerprints, until British, Norwegian and American forces showed up.
- Title: NATO caught Russia rehearsing a cable kill · TechRadar
- Summary: Russian submarines practiced cutting Arctic data lines with a device built to leave no fingerprints, until British, Norwegian and American forces showed up…
- Keywords: undersea cables, nato, russia, arctic, infrastructure security, technology, caught, rehearsing, cable, kill, TechRadar
- Source: TechRadar — https://techradar.com/pro/nato-prevented-russia-from-cutting-a-critical-undersea-cable-using-a-tool-that-leaves-no-traceable-fingerprints-on-fibre-optic-wires-1-400km-long-lines-are-part-of-nasas-near-space-network
- Published: 2026-09-14T00:15:00+00:00
- Read time: 1 min
- Topics: undersea cables, nato, russia, arctic, infrastructure security, technology
## A confrontation off Svalbard
British, Norwegian and American forces moved in on vessels tied to Russia's deep-sea research directorate during Arctic exercises this spring. No cable was damaged.
## The tool with no fingerprints
Officials say GUGI, Russia's specialized underwater operations unit, was testing a device that could sever a line while erasing the evidence linking Moscow to the cut.
## Two cables, garden-hose thin
Svalbard connects to mainland Norway through two fiber lines running 1,400km and dropping 2,700 meters down. They are about as thick as a garden hose.
## NASA's data runs through here
Those cables carry traffic from SvalSat, a major satellite ground station that also serves NASA's Near Space Network. Norway plans a third link to Jan Mayen by 2028.
## Why the Bear Gap matters
Russian ships leaving northern naval bases for the Atlantic must cross a 400-mile passage near Svalbard, which makes the local cables a communications and surveillance asset.
## A test of Article 5
Three American officials told Reuters that subsea lines could be the target of a future probe of NATO's collective-defense promise. CIA Director John Ratcliffe raised sabotage in Moscow in August.
## Norway goes public on purpose
Britain put another $136 million into P-8 patrol aircraft, and 99% of its international data rides these cables. Officials took their findings to Moscow, hoping exposure deters the next attempt.

> We have made it unequivocally clear to Russian authorities that any attempt to target our critical infrastructure will be detected and met with consequences.
## Key takeaway

The threat to undersea cables is no longer theoretical. Russia has rehearsed a cut designed to be untraceable, and the West's answer so far is to say out loud that it was watching.