Minimum en route altitude

Minimum en route altitude (MEA)
Minimum Equipment List (MEL)
Minimum obstruction clearance altitude (MOCA) ...

Minimum en route altitude (MEA). The lowest published altitude between radio fixes that ensures acceptable navigational signal coverage and meets obstacle clearance requirements between those fixes.

Minimum En Route Altitude (MEA)
The lowest altitude an aircraft can legally fly at under IFR on a given route. This is determined by the local terrain and navigation equipment.
Notice to Airmen (NOTAM) ...

Minimum En route Altitude (MEA)
The MEA provides at least 2000' of clearance above enroute obstacles when the route is over mountainous terrain and 1000' otherwise.

minimum en route altitude
MM/MTPC
Maintenance Manager/Maintenance Test Pilot Course ...

Minimum En Route Altitude- MEA.
Minimum Obstruction Clearance Altitude- MOCA.
Minimum Vectoring Altitude- MVA.

For some airports, obstructions or other factors require the establishment of nonstandard takeoff minimums or departure procedures, or both, to assist pilots in avoiding obstacles during climb to the minimum en route altitude.

See also: Course, Instrument approach, FAA, ILS, Air traffic