Which airway has a published MOCA with an altitude of 2,000 feet?

Which airway has a published MOCA with an altitude of 2,000 feet?

• A. V535 (2,000')
• B. V18 (5,000')
• C. V74 (1,000')
• D. V427 (3,000')

Answer: (A)

MOCA stands for minimum obstacle clearance altitude. It’s the lowest published altitude on an IFR enroute segment that guarantees obstacle clearance between the navigation aids and also ensures the VOR signal for that airway can be received within 25 nautical miles of the defining VOR. So, the MOCA value tells you both safety clearance and whether you can rely on that VOR for navigation at that altitude. Looking at the airways listed, the MOCA values are 2,000 feet for the first airway, 5,000 feet for the second, 1,000 feet for the third, and 3,000 feet for the fourth. Therefore, the airway with a MOCA of 2,000 feet is V535. (Remember, MOCA guarantees obstacle clearance and VOR reception within 25 NM; beyond that, you’d rely on higher altitudes like MEA if needed for navigation signals.)

MOCA stands for minimum obstacle clearance altitude. It’s the lowest published altitude on an IFR enroute segment that guarantees obstacle clearance between the navigation aids and also ensures the VOR signal for that airway can be received within 25 nautical miles of the defining VOR. So, the MOCA value tells you both safety clearance and whether you can rely on that VOR for navigation at that altitude.

Looking at the airways listed, the MOCA values are 2,000 feet for the first airway, 5,000 feet for the second, 1,000 feet for the third, and 3,000 feet for the fourth. Therefore, the airway with a MOCA of 2,000 feet is V535. (Remember, MOCA guarantees obstacle clearance and VOR reception within 25 NM; beyond that, you’d rely on higher altitudes like MEA if needed for navigation signals.)