Maximum Elevation Figures (MEF) provide clearance over which of the following?

Maximum Elevation Figures (MEF) are specifically designed to ensure vertical clearance over the highest ground elevation within a particular area, including any obstacles such as towers, trees, and other vertical obstructions. MEFs are determined using the highest terrain elevation within quadrants depicted on aeronautical charts, meaning they account for various obstacles that may pose a risk during flight.

This important safety measure provides pilots with a reliable means to maintain safe altitude when navigating in areas where elevation and obstruction may vary. The MEF reflects local terrain characteristics and other vertical structures to mitigate the risk of collision during flight. Therefore, the correct understanding of MEFs ensures that pilots can prepare adequately for the vertical challenges they may encounter in a given airspace.

The other options refer to various geographical features and navigation aids, but they do not accurately represent the purpose of MEFs, which is explicitly centered on vertical obstructions and terrain elevation.