The U.S. Coast Guard Cutter Munro has come back to its homeport in Alameda, California, after a 112-day mission in the Bering Sea and Arctic Ocean. During this time, it monitored Chinese research vessels, carried out joint exercises with Canadian forces, and enforced U.S. fishing laws.
This 418-foot national security cutter traveled over 23,000 nautical miles. This deployment is part of a larger effort to maintain U.S. presence in the Arctic, especially as Chinese and Russian activities increase, drawing more attention from the U.S. government.
While operating under the Coast Guard Arctic District, the Munro kept an eye on three Chinese-flagged research vessels as part of Operation Frontier Sentinel, which aims to track foreign activities near Alaska and protect U.S. rights in these waters.
In July, the cutter monitored the Chinese research ships Xue Long and Xue Long 2, which traveled north through the U.S. Exclusive Economic Zone (EEZ) and over the U.S. extended continental shelf in the Bering Sea.
International law allows foreign vessels to pass through these waters, but conducting scientific research within the U.S. EEZ or on its extended continental shelf requires prior U.S. approval. The Coast Guard stated that its monitoring is meant to ensure compliance with these rules and to react quickly to any unauthorized activities.
The Coast Guard did not reveal the name of the third Chinese vessel monitored during this mission in its latest update.
Additionally, the Munro took part in joint exercises with the Royal Canadian Navy. These exercises focused on improving maritime law enforcement cooperation and vessel activity awareness in Arctic waters.
The cutter also joined Operation Tundra Merlin, which brought together U.S. and Canadian military resources to test communications, command-and-control systems, and coordinated responses to potential threats in northern maritime regions.
“The Arctic presents a challenging environment for any crew and vessel,” said Capt. Adam J. Disque, the commanding officer of the Munro.
“We also strengthened our long-standing partnership with Canadian counterparts, enhancing shared awareness and coordination in this remote region,” he added.
Besides security tasks, the Munro carried out fisheries enforcement patrols in the Bering Sea, where boarding teams inspected commercial fishing vessels for adherence to federal safety regulations and fishing laws. The Coast Guard emphasized that this mission is crucial for protecting Alaska’s commercial fishing industry, which is valued at about $6 billion.
This mission is taking place as the Coast Guard faces increasing demands in the Arctic while working with a limited number of ice-capable vessels.
In September, the Coast Guard confirmed that the medium icebreaker Healy would not complete its planned high-latitude mission in 2026 due to a major engineering failure in July.
This breakdown means the Coast Guard is relying more on other assets, including the newly commissioned icebreaker Storis, national security cutters, and aircraft, to continue surveillance and patrol operations in the region.
China's increasing presence in the Arctic has become a significant concern. Chinese research ships have been conducting more visible operations in northern waters, leading U.S. and Canadian authorities to increase their monitoring of these activities.
The Coast Guard has stressed that the presence of foreign research vessels is not a violation of international law. However, they emphasize that ongoing monitoring is necessary to protect U.S. interests in the area.
Commissioned in 2017, the Munro is one of four Legend-class national security cutters based in Alameda. The ship returned to Coast Guard Island on Friday after its nearly four-month mission.