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Can You Answer These 6 MEA and MOCA Questions?

When it comes to instrument flying, how low can you go? See if you know the answers to these 6 MEA and MOCA questions.



  1. 1) What is the MEA for this section of V55?

    You got it. The Minimum Enroute IFR Altitude is the lowest published altitude between radio fixes which assures acceptable navigational signal coverage and meets obstacle clearance requirements between those fixes. In this example for V55, it's 8,000 feet. 

    The Minimum Enroute IFR Altitude is the lowest published altitude between radio fixes which assures acceptable navigational signal coverage and meets obstacle clearance requirements between those fixes. In this example for V55, it's 8,000 feet. 

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  2. 2) What is the minimum obstruction clearance that the V55 MEA guarantees (non-mountainous terrain)?

    You got it. In other than mountainous areas, the MEA provides a minimum of 1,000 feet above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown. 

    In other than mountainous areas, the MEA provides a minimum of 1,000 feet above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown. 

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  3. 3) What horizontal distance on V55 does this MEA guarantee obstruction clearance?

    You got it. In other than mountainous areas, the MEA provides a minimum of 1,000 feet above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown. 

    In other than mountainous areas, the MEA provides a minimum of 1,000 feet above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown. 

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  4. 4) What is the MOCA on this section of V55?

    You got it. MOCAs are labeled with a leading asterisk. On V55, the MOCA is 3600 feet.

    MOCAs are labeled with a leading asterisk. On V55, the MOCA is 3600 feet.

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  5. 5) What distance does a MOCA assure acceptable VOR navigation signal?

    You got it. The MOCA is the lowest published altitude in effect between radio fixes on VOR airways, off-airway routes, or route segments which meets obstacle clearance requirements for the entire route segment and which assures acceptable navigational signal coverage only within 25 statute (22 nautical) miles of a VOR.

    The MOCA is the lowest published altitude in effect between radio fixes on VOR airways, off-airway routes, or route segments which meets obstacle clearance requirements for the entire route segment and which assures acceptable navigational signal coverage only within 25 statute (22 nautical) miles of a VOR.

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  6. 6) What is the minimum obstruction clearance this MOCA guarantees (non-mountainous terrain)?

    You got it. MOCAs provide a minimum of 1,000 obstruction clearance in non-mountainous terrain.

    MOCAs provide a minimum of 1,000 obstruction clearance in non-mountainous terrain.

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Not Bad...

You scored %. You're getting the hang of these MEAs and MOCAs. Think you know more than your friends? Click share and see how they score!

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You've got these MEAs and MOCAs down.

You scored %. You're ready to fly these MEAs and MOCAs, but keep studying and you'll be an expert in no time. Think you know more than your friends? Click share and see how they score!

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You're an MEA and MOCA expert.

You scored %. It doesn't matter what MEA or MOCA you're flying, you could do it with your eyes closed! Think you know more than your friends? Click share and see how they score!

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Colin Cutler

Colin is a Boldmethod co-founder, pilot and graphic artist. He's been a flight instructor at the University of North Dakota, an airline pilot on the CRJ-200, and has directed development of numerous commercial and military training systems. You can reach him at colin@boldmethod.com.

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