Ferrying flights must be made at an altitude of at least:

For ferrying flights, regulations typically require that these flights be conducted at a minimum altitude of 500 feet above ground level. This requirement is in place to ensure safety and to avoid potential hazards on the ground. Flying at this altitude allows for a buffer zone that helps in navigating over obstacles such as buildings, trees, and other structures while also minimizing the risk of collision with wildlife.

Additionally, flying at 500 feet is generally considered a safe operational height for pilots, providing enough altitude for maneuverability while still being low enough to ensure effective navigation over the intended route. Lower altitudes, such as those suggested by the other options, would not fulfill the safety regulations and could increase the risk of accidents. By adhering to the 500-foot minimum, pilots are better equipped to maintain control and react to unexpected situations that may arise during ferrying operations.