Located in Unalska, Alaska., Coastal Transportation is one of the leading shipping companies in the United States. The company specializes in coordinating cargo movements among long-haul carriers. It is a United States flag marine transportation facility. It operates six vessels with sailings at Seattle, ports throughout Western Alaska and the Aleutian Islands. The company provides charter as well as freight services for the cargoes across the United States. Coastal Transportation offers rail services for the frozen cargoes.