Minimum En Route Altitude

Minimum En Route Altitude (MEA) is the lowest published altitude between radio fixes that ensures acceptable navigational signal coverage and meets obstacle clearance requirements between those fixes. MEA ensures that the aircraft remains at a safe altitude above the highest obstacle within a specified width of the aircraft's track. It is depicted on aeronautical charts and is used by pilots as a reference altitude for flight planning and in-flight navigation. MEA may vary depending on the segment of the route, the type of navigation aids available, and the terrain and obstacle profile of the area. It is a crucial factor in ensuring the safety of aircraft during en route operations.
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