Kirby operates tank barge. Co.'s marine transportation segment provides marine transportation services, operating tank barges and towing vessels transporting bulk liquid products. Co. transports petrochemicals, black oil, refined petroleum products and agricultural chemicals by tank barge. Co.'s distribution and services segment, sells genuine replacement parts, provides service mechanics to overhaul and repair engines, transmissions, reduction gears and related oilfield services equipment, rebuilds component parts or diesel engines, transmissions and reduction gears, and related equipment used in oilfield services, marine, power generation, on-highway and other industrial applications.