Polar-class icebreakers , are heavy

icebreaker An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships, it may also refer to smaller ...

s operated by the

United States Coast Guard The United States Coast Guard (USCG) is the maritime security, search and rescue, and law enforcement service branch of the United States Armed Forces and one of the country's eight uniformed services. The service is a maritime, military, mu ...

(USCG). These cutters, specifically designed for icebreaking, have reinforced hulls, special icebreaking bows, and a system that allows rapid shifting of ballast to increase the effectiveness of their icebreaking. The vessels conduct

Arctic The Arctic ( or ) is a polar region located at the northernmost part of Earth. The Arctic consists of the Arctic Ocean, adjacent seas, and parts of Canada (Yukon, Northwest Territories, Nunavut), Danish Realm (Greenland), Finland, Iceland, N ...

and Antarctic research and are the primary icebreakers that clear the channel into McMurdo Station for supply ships. All are homeported in

Seattle Seattle ( ) is a seaport city on the West Coast of the United States. It is the seat of King County, Washington. With a 2020 population of 737,015, it is the largest city in both the state of Washington and the Pacific Northwest regio ...

, Washington. In addition to the two Polar-class icebreakers, the USCG has a third polar-capable icebreaker, . Both ''Polar Star'' and ''Polar Sea'' are near the end of their effective lifetimes, and have spent years moored because they were in need of expensive and unbudgeted upgrades. In November 2013 four senators proposed an amendment to the 2014 Defense Appropriations Act authorizing the construction of four new Polar-class vessels, at a cost of $850 million each. The four senators sponsoring the amendment were

Maria Cantwell Maria Ellen Cantwell (; born October 13, 1958) is an American politician and former businesswoman serving as the junior United States senator from Washington since 2001. A member of the Democratic Party, she previously served in the Washingto ...

and

Patty Murray Patricia Lynn Murray (; born October 11, 1950) is an American politician and educator who is the senior United States senator from Washington since 1993. A member of the Democratic Party, Murray was in the Washington State Senate from 1988 to ...

, from Washington, and

Mark Begich Mark Peter Begich ( ; born March 30, 1962) is an American politician who served as a United States Senate, United States senator from Alaska from 2009 to 2015. A member of the Democratic Party (United States), Democratic Party, he previously ser ...

and

Lisa Murkowski Lisa Ann Murkowski ( ; born May 22, 1957) is an American attorney and politician serving as the senior United States senator for Alaska, having held that seat since 2002. Murkowski is the second-most senior Republican woman in the Senate, after Su ...

, from

Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S. ...

. According to the '' Seattle Times'' the chances that the amendment will survive into the bill, as passed, are slim. On February 22, 2017, the U.S Coast Guard announced it had awarded five fixed-price contracts worth $20 million for the future heavy polar icebreaker design studies and analysis. The icebreakers are being replaced by 3 heavy and 3 medium icebreakers as part of the Polar icebreaker program. On May 18, 2017, Adm. Paul Zukunft said that due to changes in the Arctic, the Coast Guard may have to increase the number of the future icebreakers, and the future icebreakers may have a requirement for space, weight, and power reserved for offensive and defensive weaponry which may include an anti-ship missile package.

References

Bibliography

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External links

USCG Cutter Datasheet
{{DEFAULTSORT:Polar-class icebreaker Auxiliary icebreaker classes Ships built by Lockheed Shipbuilding and Construction Company