What is the meaning of MEA in the context of IFR navigation?

The term MEA, or Minimum En Route Altitude, is critical in IFR navigation as it designates the lowest altitude that provides adequate obstacle clearance along a specific route segment while ensuring reception of navigational signals. Each MEA ensures that an aircraft remains a safe distance above terrain and obstacles, thus contributing to the safety of the flight. Additionally, the MEA is established to maintain reliable navigation signal coverage, which is essential for the pilot to effectively navigate the airspace.

Choosing the correct MEA during flight planning is vital because it directly impacts the safety, efficiency, and compliance with air traffic control procedures. For IFR operations, understanding how to interpret and use MEAs on aeronautical charts ensures that pilots adhere to safety protocols while navigating through various airspaces.