The Kremlin’s latest threat has gone largely unnoticed, perhaps because it’s no surprise. Russian officials justify the new naval restrictions with a familiar explanation, claiming that “the more active naval operations in the Arctic of various foreign countries” require such a response.

Not many observers would consider the world’s coldest shipping lane a geopolitical hotspot. But that may be about to change. Last week, reports emerged that a new Kremlin policy will require all international naval ships to give Russia 45 days’ notice before entering the Northern Sea Route, which connects the Atlantic and Pacific Oceans via the Arctic waters north of Siberia. Every vessel on the route, where Russia has invested heavily in sophisticated military infrastructure, will also be required to have a Russian maritime pilot on board. Ships found in violation of these restrictions may be forcibly halted, detained, or—in unspecified “extreme” circumstances—“ eliminated .”

Not many observers would consider the world’s coldest shipping lane a geopolitical hotspot. But that may be about to change. Last week, reports emerged that a new Kremlin policy will require all international naval ships to give Russia 45 days’ notice before entering the Northern Sea Route, which connects the Atlantic and Pacific Oceans via the Arctic waters north of Siberia.