Professional pilots fly and navigate airplanes, helicopters, and other types of aircraft. Airline pilots work for specific companies, transporting people and cargo on fixed schedules, while commercial pilots work for companies that offer charter flights, rescue operations, or aerial photography. Modern airplanes are operated by a cockpit crew made up of the captain and the co-pilot or first officer. Together, they share responsibility for flight duties such as steering the plane, communicating with air traffic controllers, and monitoring instruments. Older plans may also have a flight engineer on board, while newer aircraft have automated this role.