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Southern Ocean

The US Coast Guard Cutter Polar Star, a heavy icebreaker homeported in Seattle, Washington, rests in the ice as the motor vessel Ocean Giant departs from the National Science Foundation’s McMurdo Station on 1 February 2017. One of the primary responsibilities of the Polar Star’s crew is to provide an escort for the Ocean Giant through the frozen Ross Sea off of Antarctica. Photo courtesy of the US Coast Guard/ Chief Petty Officer David Mosley.