High Quality Content by WIKIPEDIA articles! USCGC Polar Sea (WAGB-11) is a United States Coast Guard Heavy Icebreaker. Commissioned in 1978, 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. Polar Sea is an outstanding Polar icebreaker with exceptional hull design, power, strength and weight. The design, which was the result of three years of research and testing, incorporates a number of innovative features that affect nearly every aspect of operations. Equipment on board is highly sophisticated.