What does MEA stand for in aviation?

In aviation, MEA stands for "Minimum En Route Altitude." This designation is crucial for pilots and air traffic controllers as it indicates the lowest altitude that can be flown on an airway segment while still ensuring acceptable navigation signal coverage and obstacle clearance. The MEA provides a safe altitude that allows for adequate separation from terrain and obstacles, thus ensuring that aircraft can operate safely while navigating through various airways.

The Minimum En Route Altitude is especially important during flight planning and en route navigation, as it helps pilots determine their cruising altitude based on the airways they intend to use. Understanding MEA is vital for maintaining safety and compliance with aviation regulations, as it prevents encounters with terrain and ensures that pilots have continuous radio communication and navigation aid reception, contributing to overall flight safety.