Which statement is correct regarding visual approaches in the U.S. National Airspace System?

Visual approaches in the U.S. National Airspace System are designed to facilitate efficient aircraft operations in proximity to an airport by allowing pilots to approach visually to the runway, utilizing visual references rather than relying solely on instruments. The requirement that aircraft must be under Air Traffic Control (ATC) guidance highlights the importance of maintaining safety and order in the busy airspace system. This ensures that the pilot is being provided with necessary traffic advisories and the control tower can manage the flow of aircraft effectively, particularly given that visual approaches are typically used in visual meteorological conditions where pilots can see other aircraft and the airport environment.

While visual approaches enhance operational flexibility, they must still adhere to regulatory requirements that maintain safety in air traffic operations. This includes being in contact with ATC, as they provide crucial information and clearances to ensure that all aircraft involved are spaced appropriately and that the airport and surrounding airspace are safe for landing.

The other options do not align with regulations and standard operating procedures. For instance, visual approaches cannot be initiated without ATC clearance, as safe separation from other air traffic is a core component of operational guidelines. Additionally, not all aircraft have unrestricted access to visual approaches since they depend on confirmed weather conditions and the aircraft's capabilities. Lastly,