Russia has invested heavily in its submarine fleet, making its boats quieter and more lethal, analysts say. The imagery also depicts Tupolev TU-142 and Ilyushin II-38 surveillance planes designed to track submarines. The videos released to NBC News show one submarine’s periscope peeking out of the water, and include footage of the latest Yasen-class attack submarines and a Borei-class submarine designed to carry 16 nuclear-armed ballistic missiles. they’re largely unaffected by the war in Ukraine. “The submarines and the maritime and air capabilities of the (Russian) northern fleet. “We are prepared for everything,” she added. “Now we really need to protect the whole infrastructure system and also the installations at sea.”

“After the explosions, we have actually increased our presence over these installations,” Norwegian Foreign Minister Anniken Huitfeldt said in an interview in Oslo. And since an unexplained attack last year on the Nord Stream gas pipeline linking Russia and Germany, Norway - backed by its NATO allies - stepped up security for the vast network of pipelines and communication cables off its coast. After a drastic drop in the flow of Russian natural gas to Europe, Norway replaced Russia as the top supplier to the continent. The uptick in military activity came as tensions between NATO and Russia soared following the invasion of Ukraine. A NBC News team accompanied a Norwegian Coast Guard ship, the KV Sortland, on patrol for three days last week in the North Sea, as the 25-member crew kept a close eye on gas installations while contending with heavy winds, frigid temperatures and rough seas.

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