Scientists from the Cutter Polar Star conduct tests beneath the polar ice cap. The cutter is one of two Polar Class icebreakers, which, at 399-feet long, are among the largest cutters operated by the Coast Guard. These cutters, specifically designed for open-water icebreaking have reinforced hulls, special icebreaking bows, and a system that allows rapid shifting of ballast to increase the effectiveness of their icebreaking. Built in the 1970s, they serve in the polar regions and help scientists researching these regions to gain access as well as providing supplies to remote stations.US Coast Guard Art Program 2000 Collection, Object Id 200007, "While on polar patrol," Karen Loew, oil and pastel, 14 x 17 inches