Coast Guard Cutter Polar Star departed Coast Guard Base Seattle for Antarctica, Tuesday, in support of Operation Deep Freeze for the first time since 2006 with the task of resupplying the National Science Foundation Scientific Research Station in McMurdo. For more than 50 years, Coast Guard icebreaker crews have deployed to Antarctica in support of Operation Deep Freeze. They will assist by creating a navigable shipping lane through the layers of ice in McMurdo Sound. Approximately eight million gallons of U.S.