Coast Guard monitors Chinese icebreakers in Bering Sea

Two Chinese research vessels transited through U.S. waters in the Bering Sea this week, marking the first such passage this year and prompting a U.S. Coast Guard monitoring operation. The Chinese-flagged icebreakers Xue Long and Xue Long 2 moved north through the U.S. exclusive economic zone and over the U.S. extended continental shelf, declaring the Arctic as their destination.

In response, the Coast Guard deployed the national security cutter USCGC Munro to execute Operation Frontier Sentinel, a mission designed to protect American sovereign rights, ensure compliance with international law, and position forces to respond to any unauthorized activity. The Coast Guard confirmed the transit on July 17, noting it was the first instance in 2026 of Chinese vessels being tracked moving through both jurisdictional zones simultaneously in the Bering Sea.

Under international maritime law, foreign vessels are permitted innocent passage through an exclusive economic zone, which extends 200 nautical miles from a nation's coast. However, conducting marine scientific research within that zone or on the extended continental shelf requires advance permission from the United States and an...