What does "Visual Flight Rules" (VFR) entail?

"Visual Flight Rules" (VFR) primarily focuses on the ability of pilots to navigate and control the aircraft by using visual cues, such as landmarks, the horizon, and other identifiable features outside the cockpit. Under VFR, pilots are required to maintain a certain level of visibility and to avoid flying into adverse weather conditions that could compromise their ability to see and navigate effectively. This rule allows pilots to operate an aircraft based on their visual observations of the environment, promoting situational awareness.

In contrast, the other options suggest modes of operation that are either contrary to the core of VFR or describe instrument-based flying conventions. For instance, flying in all weather conditions regardless of visibility does not align with VFR principles, as good visibility is essential. Relying solely on instruments describes Instrument Flight Rules (IFR), which differ from VFR by necessitating dependence on cockpit instruments rather than outside visual references. Finally, flying based solely on flight path devices again implies a reliance on instruments or automation, which is not the essence of VFR flying. Thus, the correct understanding of VFR hinges on the use of visual assessments to safely navigate and operate the aircraft.