The Polar Star is a United States Coast Guard Heavy Icebreaker. Commissioned in 1976, built by Lockheed Shipbuilding and Construction Company of Seattle, sister ship to the USCGC Polar Sea (WAGB-11). Coast Guard shield The United States Coast Guard is the coast guard of the United States. ... US Coast Guard icebreakers near McMurdo Station, February 2002 An icebreaker is a special purpose ship designed to move and navigate through ice covered marine environments. ... 1976 is a leap year starting on Thursday (link will take you to calendar). ... City nickname Emerald City City bird Great Blue Heron City flower Dahlia City mottos The City of Flowers The City of Goodwill City song Seattle, the Peerless City Mayor Greg Nickels County King County Area - Total - Land - Water - % water 369. ... USCGC Polar Sea is a United States Coast Guard Heavy Icebreaker. ... USCGC Polar Sea is a United States Coast Guard Heavy Icebreaker. ...
PolarStar's three shafts are turned by either a diesel-electric or gas turbine power plant.
With an icebelt that is 1-3/4 inches thick, the PolarStar has sufficient hull strength to absorb the high-powered ice ramming common to her operations.
PolarStar's hull shape is designed to maximize icebreaking by efficiently combining the forces of the ship's forward motion, the downward pull of gravity on the bow, and the upward push of the inherent buoyancy of the stern.
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