What does VFR stand for in aviation?

VFR stands for Visual Flight Rules, which are 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 these rules, pilots are responsible for maintaining visual contact with the ground and navigating by visual references rather than relying solely on instruments.

Flying under VFR typically involves adhering to specific altitudes, distance from clouds, and visibility requirements that allow for safe flying without reliance on instrument guidance. This ensures that pilots can make visual observations to avoid obstacles and other aircraft.

The other options present terms that do not accurately represent the standard aviation terminology used. Variable Flight Regulations and Vertical Flight Requirements do not exist as formal categories in aviation, and Visual Fuel Reserve is not a recognized term in the context of flight rules. Understanding VFR is crucial for pilots as it defines specific operations that must be followed when flying under clear weather conditions.