What type of aircraft generally requires a higher minimum visibility than VFR for operations?

Commercial airliners typically require a higher minimum visibility than Visual Flight Rules (VFR) for their operations because of their role in mass transportation and the need for stringent safety protocols. These aircraft operate under Instrument Flight Rules (IFR) in many circumstances, particularly during takeoff, landing, and when flying through controlled airspace or in areas with variable weather conditions. The elevated visibility requirements enhance safety by ensuring pilots have clear sightlines for navigation and avoiding obstacles, especially in busy airspace.

In contrast, helicopters and general aviation aircraft may operate under VFR and can sometimes fly safely with lower visibility due to their ability to maneuver in tighter spaces and land in various locations. Military transport aircraft can have varied requirements depending on their mission and may not always adhere to the same visibility rules as commercial airliners, allowing more flexibility in certain operations.