What type of airspace typically requires pilots to maintain a minimum visibility of 3 miles for VFR flight?

In uncontrolled airspace, specifically Class G airspace, pilots must adhere to minimum visibility requirements for Visual Flight Rules (VFR) flight, which typically include maintaining at least 3 statute miles of visibility. Class G airspace is the only airspace designation that does not have air traffic control (ATC) services active at all times and is often found in rural areas or lower altitudes where traffic is less congested.

This visibility requirement allows pilots flying under VFR to navigate safely and spot other aircraft and landmarks, ensuring they can effectively avoid obstacles. In contrast, other classes of airspace such as Class E, D, and C have increased constraints and often include specific visibility and cloud clearance requirements, typically being utilized in areas with more controlled traffic.