In Alternate Derived Minimums, how much is added for 1 NAVAID?

In Alternate Derived Minimums, how much is added for 1 NAVAID?

• A. 400 feet and 1 mile
• B. 200 feet and 1/2 mile
• C. 600 feet and 2 miles
• D. 100 feet and 3/4 mile

Answer: (A)

When deriving Alternate Minimums, the amount added depends on how many navigation aids control the approach. If only one NAVAID is used to define the approach for the alternate, you add 400 feet to the published minimum altitude and 1 statute mile to the visibility minimum. This larger margin accounts for the increased risk when relying on a single guidance source, ensuring the alternate remains feasible even with some signal uncertainty or slight alignment issues. So the derived alternate minimums would be the original minimums plus 400 feet and plus 1 mile. For example, a published minimum of 1,000 feet and 3 miles would become 1,400 feet and 4 miles. The other options reflect margins used in scenarios with more than one NAVAID, which is why they don’t apply here.

When deriving Alternate Minimums, the amount added depends on how many navigation aids control the approach. If only one NAVAID is used to define the approach for the alternate, you add 400 feet to the published minimum altitude and 1 statute mile to the visibility minimum. This larger margin accounts for the increased risk when relying on a single guidance source, ensuring the alternate remains feasible even with some signal uncertainty or slight alignment issues. So the derived alternate minimums would be the original minimums plus 400 feet and plus 1 mile. For example, a published minimum of 1,000 feet and 3 miles would become 1,400 feet and 4 miles. The other options reflect margins used in scenarios with more than one NAVAID, which is why they don’t apply here.