USCGC Polar Sea (WAGB-11) is a United States Coast Guard Heavy Icebreaker. Commissioned in 1977, the ship was built by Lockheed Shipbuilding and Construction Company of Seattle along with her sister ship, Polar Star (WAGB-10). Homeported in Seattle, Washington, Polar Sea and Polar Star operate under the control of Pacific Area and coordinate their operations through the Ice Operations Section of the United States Coast Guard. The Coast Guard plans to decommission the ship by September 2011.