This U.S. industry comprises establishments primarily engaged in renting or leasing off-highway transportation equipment without operators, such as aircraft, railroad cars, steamships, or tugboats. Cross-References. Establishments primarily engaged in-- ? Renting or leasing air, rail, highway, and water transportation equipment with operators--are classified in Sector 48-49, Transportation and Warehousing, based on their primary activity; ? Renting pleasure boats--are classified in U.S. Industry 532292, Recreational Goods Rental; and ? Renting or leasing automobiles or trucks without drivers--are classified in Industry Group 5321, Automotive Equipment Rental and Leasing.