Instrument Flight Rules, commonly known as IFR, are essential regulations that enable aircraft equipped with the right instruments to operate in challenging weather conditions, specifically under instrument meteorological conditions (IMC). These rules are outlined in ICAO Annex 2: Rules of the Air, particularly in Chapter 5, which focuses on IFR. To ensure safe operations, JAR-OPS 1.652, along with related guidance materials, specifies the necessary flight and navigation instruments required for IFR or nighttime flying. Additionally, national Aeronautical Information Publications (AIPs) may impose further requirements. Minimum Equipment Lists (MELs) are critical, detailing when IFR flights can start or continue even if certain aircraft equipment is not functioning properly. Furthermore, JAR-OPS 1.960 outlines the qualifications pilots must have to conduct IFR flights safely. Overall, IFR plays a vital role in aviation safety and efficiency.
