When is a VFR flight plan required?

A VFR flight plan is not strictly required for operations under Visual Flight Rules, but it is highly recommended for safety and flight planning purposes. It enhances communication with air traffic control and allows for a search and rescue effort if the flight doesn't arrive as planned.

When considering the options, the correct context is that a VFR flight plan does come into play significantly when navigating through controlled airspace, which typically requires coordination with air traffic control.

However, it is important to clarify that a VFR flight plan is usually recommended when intending to fly over populated areas, when flying over long distances or mountainous terrains, and particularly when operating in or around controlled airspace to ensure separation from other aircraft. This illustrates the value of a flight plan in managing safety, communication, and flight operations effectively.

Given this context, the notion that a VFR flight plan is required specifically when flying over the ADIS (Aeronautical Data Information System) may align with the practices of ensuring one is well-prepared for any airspace structural nuances and air traffic updates, particularly in controlled environments. This adds to the overall strategic approach to ensuring a flight's safety and regulatory compliance while still emphasizing that VFR flight plans, while not mandatory, play a crucial role in orchestr