Final answer:
Altitude changes between legs in aviation follow strict FAA rules, maintaining horizontal and vertical separation from other aircraft and being directed by air traffic control.
Step-by-step explanation:
Executing altitude changes between legs in aviation requires adherence to specific rules and procedures to ensure safety and compliance with regulatory bodies, such as the Federal Aviation Administration (FAA). Aircraft must maintain a separation of five miles horizontally or 2,000 feet vertically from others at the same altitude, or 1,000 feet if below 29,000 feet. Pilots must follow the instructions from air traffic control, which may include step climbs or descents during a flight path, ensuring that these altitude changes occur well clear of other traffic. Proper understanding and application of these regulations are crucial for maintaining orderly and safe skies.