What altitude must be used when approaching an airport under VFR?

When approaching an airport under Visual Flight Rules (VFR), the appropriate altitude to use is determined based on the specified VFR cruising altitude, which is dictated by the aircraft's magnetic course. This regulation ensures that aircraft maintain safe vertical separation from each other as well as other airspace users.

For instance, VFR cruising altitudes are typically assigned as odd thousands plus 500 feet for courses from 0° to 179° magnetic, and even thousands plus 500 feet for courses from 180° to 359° magnetic. This altitude scheme is intended to enhance situational awareness and minimize the risk of midair collisions, facilitating safer operations in the airspace.

Other options provided do not align with the established practices in the VFR structure. An altitude of 1000 feet AGL does not take traffic patterns and other VFR requirements into account, while stating a specific altitude of 3000 feet AGL overlooks that pilots are not bound to fly at that height unless required for safety. Furthermore, a blanket requirement of 500 feet AGL does not consider airspace restrictions and traffic, making it inappropriate in a varied operational context. By adhering to the VFR altitude guidelines based on magnetic courses, pilots can navigate safely and effectively in the