Which altitude term defines the minimum enroute altitude that guarantees obstacle clearance and reception of navigational signals?

Which altitude term defines the minimum enroute altitude that guarantees obstacle clearance and reception of navigational signals?

• A. MEA.
• B. Assigned altitude.
• C. Expected altitude.
• D. Minimum safe altitude.

Answer: (A)

The main concept is that the minimum enroute altitude is the lowest published altitude on an IFR route segment that both provides obstacle clearance and guarantees reception of navigational signals along that segment. This is why the term is the best fit: it ensures you stay above terrain or obstacles and that your navigation equipment can reliably receive the required VOR/DME signals while en route. A closely related term, MOCA, also protects obstacle clearance and nav signal reception, but only within 100 NM of a VOR; beyond that range, nav signal reception isn’t guaranteed. The assigned altitude is simply what ATC directs you to fly, and the expected altitude is what you anticipate due to procedures or vectors, not the safety/navigation guarantees provided by MEA.

The main concept is that the minimum enroute altitude is the lowest published altitude on an IFR route segment that both provides obstacle clearance and guarantees reception of navigational signals along that segment. This is why the term is the best fit: it ensures you stay above terrain or obstacles and that your navigation equipment can reliably receive the required VOR/DME signals while en route. A closely related term, MOCA, also protects obstacle clearance and nav signal reception, but only within 100 NM of a VOR; beyond that range, nav signal reception isn’t guaranteed. The assigned altitude is simply what ATC directs you to fly, and the expected altitude is what you anticipate due to procedures or vectors, not the safety/navigation guarantees provided by MEA.