What altitude must an aircraft maintain over congested areas, other than for takeoff or landing?

In the context of aviation regulations concerning flight over congested areas, the requirement mandates that an aircraft must maintain an altitude that is at least 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet from the aircraft. This regulation is crucial for ensuring safety and minimizing the risk of collision with buildings, towers, or other structures in densely populated areas.

This altitude requirement serves to provide a safety buffer, allowing pilots to navigate safely through urban environments without the risk of inadvertently descending into hazardous situations. By establishing a standard of 1,000 feet above the highest obstacle, regulations help to maintain clear airspace and ensure that aircraft can execute maneuvers safely over populated regions.

The other altitude options may not adequately account for the necessary safety margin established in aviation regulations for congested areas. Therefore, maintaining an altitude of 1,000 feet above the highest obstacle effectively balances safety and operational requirements while flying in these sensitive environments.