The USCGC Polar Sea is a heavy icebreaker operated by the United States Coast Guard. Commissioned in 1978, it is designed to navigate through thick sea ice in polar regions, supporting various missions such as scientific research, search and rescue, and national defense. The vessel is equipped with powerful engines and reinforced hulls to break through ice up to 6 feet thick. The Polar Sea has a length of 399 feet and can carry a crew of around 150 personnel. It plays a crucial role in maintaining U.S. presence in the Arctic and Antarctic, contributing to the understanding of climate change and supporting the work of organizations like the National Science Foundation.