neucoas Posted January 10, 2016 Share Posted January 10, 2016 Sorry if it's too dumb, but just to make sure. The number "60" in this red square indicates that the maximum terrain peak of the area is 6000Ft MLS? If it says "45" it's 4500ft? "105" 10500ft. Thanks Link to comment Share on other sites More sharing options...
Mikelab6 Posted January 10, 2016 Share Posted January 10, 2016 Not the highest of terrain peak, it's the height of the highest feature ... Wiki info : Maximum elevation figure or MEF is a type of VFR altitude which indicates the height of the highest feature within a 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.) 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.) Unlike the Minimum safe altitude used for IFR flight, the MEF does not include any margin for aircraft clearance above the terrain nor for altimeter error.[1] 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 Link to comment Share on other sites More sharing options...
neucoas Posted January 11, 2016 Author Share Posted January 11, 2016 Great! Thanks, really clear right now ! Neu. Link to comment Share on other sites More sharing options...
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