Lesson plan
Maximum elevation figure
Maximum elevation figure (MEF) is a type of visual flight rule (VFR) information that indicates the elevation of the highest geographical feature within a GEOREF quadrangle area. It is of interest to pilots, who want to be aware of the highest mountain peaks and tall towers nearby, so that they can fly above them to avoid controlled flight into terrain. ("Features" includes terrain, trees, towers, and other obstacles.) Much like the minimum safe altitude (MSA) used for flight under instrument flight rules, the MEF includes a margin for aircraft clearance above the terrain and altimeter error. In a VFR flight, the MEF is commonly referred to as a "quadrantal altitude" (not to be confused with an IFR minimum sector altitude).
Article summary
Maximum elevation figure (MEF) is a type of visual flight rule (VFR) information that indicates the elevation of the highest geographical feature within a GEOREF quadrangle area. It is of interest to pilots, who want to be aware of the highest mountain peaks and tall towers nearby, so that they can fly above them to avoid controlled flight into terrain. ("Features" includes terrain, trees, towers, and other obstacles.) Much like the minimum safe altitude (MSA) used for flight under instrument flight rules, the MEF includes a margin for aircraft clearance above the terrain and altimeter error. In a VFR flight, the MEF is commonly referred to as a "quadrantal altitude" (not to be confused with an IFR minimum sector altitude).
Key claims
No claims recorded.
Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
No sources recorded.
Key claims and bibliography are generated from the same tracked claims and sources as the article page.