What does VFR stand for in aviation?

VFR stands for Visual Flight Rules, which is a set of regulations under which a pilot operates an aircraft in weather conditions generally clear enough to allow the pilot to see where the aircraft is going. Under VFR, pilots are responsible for maintaining visual separation from other aircraft and avoiding obstacles, which allows them to navigate and control the aircraft based primarily on visual references rather than relying solely on instruments.

The primary reason for VFR's significance is that it provides a framework for pilots to fly under specific weather conditions, typically when visibility is good. This allows for a more straightforward navigation system compared to Instrument Flight Rules (IFR), which are used in less favorable weather conditions where pilots rely on instruments for navigation and control.

The other options do not accurately reflect the established terminology and regulations in aviation regarding flight rules and are not recognized standards.