Final answer:
The commercial operator must ensure that no passengers are carried when ferrying an aeroplane for repair. Air traffic safety is maintained by the FAA's strict separation guidelines and a sophisticated air traffic control system, which prevent collisions and manage the flight paths of numerous aircraft.
Step-by-step explanation:
The operational requirement that must be observed by a commercial operator when ferrying a large, three-engine, turbojet-powered aeroplane from one facility to another to repair an inoperative item is that no passengers may be carried. This is to ensure the safety of non-crew members, as the flight may not comply with all the usual operational standards given the need for repair.
Ensuring the safety of airspace and avoiding collisions between aircraft, the Federal Aviation Administration (FAA) sets strict guidelines on aircraft separation. Each airplane must keep a distance of five miles from another aircraft flying at the same altitude and maintain a vertical separation of 2,000 feet above or below another aircraft, which is reduced to 1,000 feet if the altitude is under 29,000 feet.
Efficient airspace management, the use of radar and communication systems, flight scheduling, and route planning all contribute to the safe operation of numerous flights simultaneously. These measures are part of a complex air traffic control system that ensures safe and orderly navigation of the skies.