What is required to execute an instrument approach to an airport?

To execute an instrument approach to an airport, having an Instrument Approach Procedure (IAP) Chart is essential. This chart provides critical information such as the approach path, navigation aids, minimum altitudes, and visibility requirements needed for a safe and accurate approach to the runway. It is a crucial tool that pilots rely on during the execution of instrument approaches, especially in conditions with reduced visibility or when flying on instruments rather than visually.

While the other options — Air Traffic Control clearance, Pilot Weather Report, and Flight Plan approval — are important components of overall flight operations, they do not directly provide the navigational details required to conduct the instrument approach itself. For instance, while ATC clearance is necessary for entering controlled airspace and carrying out a specific approach, it does not replace the need for the IAP Chart. Therefore, possessing the IAP Chart is fundamental for pilots to successfully and safely perform instrument approaches to airports.