What does VFR stand for in aviation navigation?

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 navigate and control the aircraft by visual reference to the ground and other landmarks, rather than relying solely on instruments. This operational mode relies on a pilot's ability to see and avoid other aircraft and obstacles and is typically used when the weather meets specific criteria, providing a clear line of sight to navigate.

The concept of VFR is crucial in aviation because it enhances safety for pilots flying under favorable weather conditions while facilitating the use of airspace for all types of operations. A solid understanding of VFR is vital for flight planning and execution, especially in general aviation and less congested airspace.