Under what conditions do pilots typically fly under VFR?

Answer: B — When visibility is good, allowing the pilot to see and avoid obstacles

Pilots typically fly under Visual Flight Rules (VFR) when visibility is good, allowing them to see and avoid obstacles. VFR is designed to enhance situational awareness and safety, enabling pilots to operate an aircraft using visual references outside the cockpit, rather than relying solely on instruments. Good visibility helps ensure that pilots can maintain visual contact with the terrain, other aircraft, and any potential hazards, which is fundamental for safe flying under VFR. The other options present scenarios that do not align with the principles of VFR flying. Minimal visibility would hinder a pilot's ability to navigate safely, while adverse weather conditions would likely require flying under Instrument Flight Rules (IFR) instead. Navigating via instruments is also primarily associated with IFR, as it relies on instruments rather than visual references. Thus, the correct choice emphasizes the importance of good visibility for VFR operations and the necessity for pilots to maintain visual separation from obstacles and other traffic.