Casco Cove Coast Guard Station (IATA: ATU, ICAO: PAAT, FAA LID: ATU) is a military facility and private use airfield on Attu Island, one of the Aleutian Islands in the U.S. state of Alaska. Owned by the United States Coast Guard, Casco Cove CGS is located 1,481 miles (2,383 km) west of Anchorage, Alaska.