49-Year-Old USCG Icebreaker Polar Star Departs Antarctic Region

U.S. Coast Guard Cutter Polar Star (WAGB 10) and crew departed the Antarctic region Tuesday after 65 days south of the Antarctic Circle in support of Operation Deep Freeze 2025.

Operation Deep Freeze is an annual event, led by the U.S. Antarctic Program (USAP) in conjunction with the Department of Defense, to support the U.S. National Science Foundation (NSF). The USAP advances the nation’s goals to support the Antarctic Treaty, fosters cooperative research with other nations, protects Antarctic resources, and develops measures to ensure the wise use of those resources.

Operation Deep Freeze showcases a complex symphony of strategic inter-theater airlift, tactical intra-theater airlift and airdrop, aeromedical evacuation support, search and rescue response, sealift, seaport access, bulk fuel supply, port cargo handling, and transportation requirements. Polar Star’s crew performed icebreaking duties in McMurdo Sound, clearing routes to ensure safe passage for cargo vessels for McMurdo Station and New Zealand’s Scott Base.

“The surface ice conditions in McMurdo Sound were abnormally light this year, a welcome change of pace from the extreme conditions experienced last year,” said Capt. Jeff Rasnake, Polar Star’s commanding officer. “Operation Deep Freeze presented a number of challenges, beyond those inherent in maintaining and operating a 49-year-old ship to complete this arduous mission.”

Polar Star worked with the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) to support a secure and sustainable Southern Ocean. Polar Star was the first United States surface asset to support CCAMLR. The crew’s efforts to observe and monitor fishing and other activity on the high seas safeguarded resources and U.S. national interests in the Antarctic region.

Polar Star also conducted a crew exchange with the New Zealand Defense Force ship Aotearoa. 

The crew has transited nearly 16,000 miles since departing its Seattle homeport in November with stops in Honolulu, Sydney, and McMurdo Station. Polar Star celebrated its 49th year of Service to the Nation and visited Cape Polar Star in the northern part of the Ross Sea. Cape Polar Star was named after Polar Star for the scientific support provided by the cutter in the area during Operation Deep Freeze 86.

The Polar Star is the United States’ only asset capable of providing access to both Polar Regions. The Seattle-based cutter is a 399-foot heavy polar icebreaker commissioned in 1976, weighing 13,500 tons and is 84-feet wide with a 34-foot draft. The cutter's six diesel and three gas turbine engines produce up to 75,000 horsepower.