The United States Coast Guard reported that it closely monitored Chinese polar research vessels transiting the Bering Sea en route to the Arctic Ocean last week, reflecting ongoing concerns about Beijing’s expanding activities in the region. The Coast Guard Cutter Munro tracked the Chinese icebreakers Xuelong and Xuelong 2 as they moved northward through the U.S. exclusive economic zone (EEZ) and extended continental shelf, marking the first such transit by Chinese vessels this year.

Under international law, coastal states have sovereign rights over natural resources and economic activities within their EEZs, which extend up to 200 nautical miles from shore. However, they do not have full sovereignty over the waters themselves, allowing foreign vessels to operate within EEZs subject to certain regulations. The U.S. Coast Guard emphasized that while the Chinese vessels were permitted to navigate these waters, their activities must comply with established international law. It also noted that any marine scientific research conducted within the U.S. EEZ requires prior authorization and the sharing of collected data with U.S. authorities.

Analysts monitoring China’s Arctic activities view the increasing presence of Chinese research expeditions as part of a broader strategy to establish a more sustained role in the region. Mike Bosack, director of the Parley Policy Initiative, described the current surge in Chinese survey voyages as a step toward long-term engagement, predicting that China will continue to expand its research presence as Arctic opportunities grow.

Tensions in the Arctic, particularly around the Bering Strait, have risen amid joint Russian-Chinese military exercises and the growing frequency of Chinese scientific missions. U.S. defense officials have expressed concerns that some of these research operations serve military purposes in addition to their stated scientific goals, especially given the strategic value of oceanographic data for military navigation and surveillance. China has consistently denied these allegations, maintaining that its Arctic research is purely civilian and scientific in nature.

The Biden administration’s 2022 National Strategy for the Arctic Region cautioned that China’s civilian scientific activities may involve “dual-use research with intelligence or military applications.” The Pentagon’s 2024 Arctic Strategy echoed this view, noting that Chinese icebreakers facilitate dual civil-military research capabilities through advanced technologies such as uncrewed underwater vehicles and polar-capable fixed-wing aircraft.

This year’s expedition marks China’s 16th Arctic scientific mission, with the country typically conducting research voyages in the Arctic during the summer months and in Antarctica during the winter. The Chinese vessels involved, Xuelong and Xuelong 2, are specialized icebreakers equipped for polar exploration, underscoring China’s sustained commitment to Arctic engagement despite international scrutiny.