What does IFR stand for in aviation?

The correct answer is Instrument Flight Rules. In aviation, IFR is a set of regulations under which a pilot operates an aircraft in controlled airspace and relies on instruments for navigation and flight control. This is essential when flying in conditions where visual references are limited, such as in clouds or poor visibility.

IFR provides a framework for pilots and air traffic controllers to maintain safe operations in the skies. It outlines the procedures and requirements for flight operations relying on instrument navigation, which is crucial for ensuring safety and efficiency in air traffic management. Understanding IFR is fundamental for any pilot or air traffic controller, as it ensures that flights can operate safely irrespective of the weather conditions, enhancing the overall effectiveness of air travel.