Pilots are the most visible professionals in the aviation industry, responsible for operating aircraft and ensuring passenger safety. The career progression for pilots typically involves obtaining a Private Pilot License (PPL), advancing to a Commercial Pilot License (CPL), and ultimately achieving an Airline Transport Pilot License (ATPL). Specializations include becoming a captain, instructor, or flying different types of aircraft such as helicopters or cargo planes. Flight attendants, part of the flight crew, provide in-flight service and ensure passenger comfort and safety.