Customs brokers in the United States prepare and submit documentation to notify or obtain clearance from government agencies such as the U.S. Food and Drug Administration, the U.S. Department of Agriculture, and the Fish and Wildlife Service. They also arrange the transhipment (i.e., local delivery) of merchandise via trucking companies. Many customs brokers specialize in certain goods like apparel, perishables, or clearing the crew and manifest of large cargo vessels. Customs brokers can be located at inland ports to clear merchandise sent "in bond", but most are located at major airports and harbors with international traffic.