Which of the following are the two main types of flight rules?

The two main types of flight rules are Visual Flight Rules (VFR) and Instrument Flight Rules (IFR). VFR pertains to the operation of aircraft in weather conditions generally clear enough to allow pilots to see where they are going and avoid obstacles. This set of rules allows pilots to navigate visually, relying on sight rather than instruments.

On the other hand, IFR is applied when visibility is limited, or in conditions where pilots cannot navigate safely by visual reference alone. Under IFR, pilots must rely on instruments and adhere to specific air traffic control (ATC) instructions to ensure safe navigation and separation from other aircraft.

The comprehensive understanding of these two rule sets helps pilots and air traffic controllers to effectively communicate and maintain safety in the airspace, accommodating both visual navigators and those relying on instrumentation.