What does IFR stand for in aviation?

In aviation, IFR stands for Instrument Flight Rules. This set of regulations governs the procedures for flying an aircraft in weather conditions generally less than the minimum needed for visual flight is known as VFR (Visual Flight Rules). Under IFR, pilots rely primarily on instruments in the cockpit to navigate and control the aircraft, rather than on visual references outside the aircraft. This is crucial during poor weather conditions or when flying at night, as it allows for safe and efficient operation in various environments.

The choice of 'Instrument Flight Rules' addresses the critical operational framework that assures safety and efficiency in aviation, especially in controlled airspace and at crowded airports. Pilots must be trained and certified to fly under IFR, indicating a higher level of proficiency in navigational skills and aircraft operation. This knowledge is essential in ensuring that pilots can follow prescribed air traffic control instructions and maintain separation from other aircraft, regardless of external visibility conditions.