The U.K. and Norway will send more than a dozen warships out to hunt Russian submarines and shield critical infrastructure in the northern Atlantic Ocean in new patrols over the coming years.

Why It Matters

London says it has detected a 30 percent increase in Russian vessels posing a threat to U.K. waters in the past two years. Oslo shares around 120 miles of land border with Moscow, Norwegian soil stopping not far west of Russia 's major military bases clustered around the Arctic cities of Murmansk and Severomorsk.

NATO countries are beefing up defenses around critical undersea infrastructure like the extensive pipelines and cables snaking along the seabed, which are vulnerable to sabotage and hard to protect. Undersea cables carry roughly 98 percent of the world's data, essentially

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