Maximum elevation figure: Difference between revisions
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'''Maximum elevation figure''' or '''MEF''' is the a type of [[Visual flight rules|VFR]] altitude which indicates the height of the highest feature within a [[Georef|quadrangle]] area. It is of interest to pilots so they can fly above mountain peaks and tall towers without the worry of [[controlled flight into terrain|flying into them]]. Features include terrain, trees, towers, and the like. In a [[Visual flight rules|VFR]] context, this altitude is commonly referred to as a "quadrantal altitude" (not to be confused with an [[Instrument flight rules|IFR]] [[minimum sector altitude]] or "quadrantal" altitude.) |
'''Maximum elevation figure''' or '''MEF''' is the a type of [[Visual flight rules|VFR]] altitude which indicates the height of the highest feature within a [[Georef|quadrangle]] area. It is of interest to pilots so they can fly above mountain peaks and tall towers without the worry of [[controlled flight into terrain|flying into them]]. Features include terrain, trees, towers, and the like. In a [[Visual flight rules|VFR]] context, this altitude is commonly referred to as a "quadrantal altitude" (not to be confused with an [[Instrument flight rules|IFR]] [[minimum sector altitude]] or "quadrantal" altitude.) |
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In the US, the [[Federal Aviation Administration]] issues [[sectional chart]]s. Each rectangular area covering one degree of latitude and one degree of longitude is divided into four smaller areas called ''[[Georef|quadrangle]]s'', each spanning half a degree of latitude and half a degree of longitude. Each quadrangle has its MEF printed in it in thousands and hundreds of feet above mean sea level. For example, 10<sup>5</sup>, means that the highest elevation is 10,500 feet within that quadrangle. |
In the US, the [[Federal Aviation Administration]] issues [[sectional chart]]s. Each rectangular area covering one degree of latitude and one degree of longitude is divided into four smaller areas called ''[[Georef|quadrangle]]s'' (in accordance with the [[Georef]] system), each spanning half a degree of latitude and half a degree of longitude. Each quadrangle has its MEF printed in it in thousands and hundreds of feet above mean sea level. For example, 10<sup>5</sup>, means that the highest elevation is 10,500 feet within that quadrangle. |
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MEFs are determined by taking the point of highest elevation within a [[Georef|quadrangle]], adding 100 feet for vertical error, then adding the height of the highest obstacle in the quadrangle or 200 feet, whichever is higher, then rounding up to the next hundred feet.<ref name="MEF"> |
MEFs are determined by taking the point of highest elevation within a [[Georef|quadrangle]], adding 100 feet for vertical error, then adding the height of the highest obstacle in the quadrangle or 200 feet, whichever is higher, then rounding up to the next hundred feet.<ref name="MEF"> |
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Revision as of 21:18, 25 March 2013
 | This article needs additional citations for verification. (December 2008) |
Maximum elevation figure or MEF is the a type of VFR altitude which indicates the height of the highest feature within a quadrangle area. It is of interest to pilots so they can fly above mountain peaks and tall towers without the worry of flying into them. Features include terrain, trees, towers, and the like. In a VFR context, this altitude is commonly referred to as a "quadrantal altitude" (not to be confused with an IFR minimum sector altitude or "quadrantal" altitude.)
In the US, the Federal Aviation Administration issues sectional charts. Each rectangular area covering one degree of latitude and one degree of longitude is divided into four smaller areas called quadrangles (in accordance with the Georef system), each spanning half a degree of latitude and half a degree of longitude. Each quadrangle has its MEF printed in it in thousands and hundreds of feet above mean sea level. For example, 105, means that the highest elevation is 10,500 feet within that quadrangle.
MEFs are determined by taking the point of highest elevation within a quadrangle, adding 100 feet for vertical error, then adding the height of the highest obstacle in the quadrangle or 200 feet, whichever is higher, then rounding up to the next hundred feet.[1]
References
- ^ "Explanation of VFR Terms and Symbols" (PDF). Federal Aviation Administration. Retrieved 27 February 2011.
See Also
Minimum safe altitude (for IFR flight), including Area Minimum Altitudes (AMAs)
External links
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