This industry comprises establishments primarily engaged in providing services to water transportation (except port and harbor operations; marine cargo handling services; and navigational services to shipping). Ship painting--are classified in Industry 238320, Painting and Wall Covering Contractors; Providing ship janitorial services--are classified in Industry 561720, Janitorial Services; Operating port, harbor, or canal facilities--are classified in Industry 488310, Port and Harbor Operations; Providing stevedoring and other marine cargo handling services--are classified in Industry 488320, Marine Cargo Handling; Providing navigational services to shipping--are classified in Industry 488330, Navigational Services to Shipping; and Providing ship overhauling or repairs in a shipyard--are classified in U.S. Industry 336611, Ship Building and Repairing.