This U.S. industry comprises establishments primarily engaged in providing air transportation of cargo without transporting passengers over regular routes and on regular schedules. Establishments in this industry operate flights even if partially loaded. Establishments primarily engaged in providing scheduled air transportation of mail on a contract basis are included in this industry. Establishments primarily engaged in--

Including:

• Air cargo carriers (except air couriers), scheduled
• Airmail carriers, scheduled
• Cargo carriers, air, scheduled
• Freight carriers (except air couriers), air, scheduled
• Helicopter freight carriers, scheduled
• Scheduled air freight carriers
• Scheduled air freight transportation