What is the required VFR cruising altitude for flights flying at 3,000 ft or more AGL based on magnetic course?

For flights operating at an altitude of 3,000 feet or more above ground level (AGL), the required VFR cruising altitude is based on the magnetic course of the flight. This is significant because VFR cruising altitudes are determined by the magnetic course to ensure proper vertical separation between aircraft flying in opposite directions.

When flying between 3,000 feet AGL and up, the regulatory requirement dictates that pilots should adhere to a specific altitude rule: for courses of 0° to 179° magnetic, pilots fly at odd thousands plus 500 feet (for example, 3,500; 5,500; 7,500 feet, etc.). Conversely, for courses of 180° to 359° magnetic, the requirement is to fly at even thousands plus 500 feet (like 4,500; 6,500; 8,500 feet, etc.). This arrangement helps to prevent mid-air collisions by maintaining distinct altitudes for planes traveling in opposite directions.

In summary, because option B accurately describes the altitude requirement as being based on magnetic course and specifies that it applies to altitudes of more than 3,000 feet AGL, it is the correct choice.