When flying over congested areas, what altitude must be maintained?

When flying over congested areas, the requirement is to maintain an altitude that is safely above the highest obstacle within a horizontal radius of 2,000 feet. This regulation is crucial for ensuring that aircraft are operating at a safe distance from potential obstacles such as buildings, towers, and other structures that could pose a risk during flight. By maintaining this altitude, pilots can ensure a safer margin in the event of an engine failure or any other in-flight emergency, allowing ample space for maneuvering or descent.

The specific stipulation of a 2,000-foot radius is designed to provide a buffer zone that accounts for both the vertical distance and the horizontal extent of potential hazards. This helps in protecting not only the aircraft but also the people and property below, which is especially important in congested urban environments.

The other choices provided do not accurately reflect the regulations for flying over congested areas. Some suggest lesser altitudes or different horizontal requirements that do not adequately account for all possible obstacles in the surrounding area. Maintaining an altitude above the highest obstacle within 2,000 feet horizontally ensures compliance with safety standards established for flight operations in densely populated locations.