Kirby Corporation conducts operations in two business segments: marine transportation and diesel repair. The Company's marine transportation segment is engaged in the inland transportation of industrial chemicals, petrochemical feedstocks, agricultural chemicals and refined petroleum products by tank barge; and in the offshore transportation of refined petroleum products by tanker and tank barge, and dry-bulk, container and palletized cargoes by barge and break-bulk ship. The Company's diesel repair segment is engaged in the sale, overhaul and repair of diesel engines and related parts sales.