Alternate Derived Minimums specify increments for NAVAIDs. What are the increments for 1 NAVAID and for 2 NAVAIDs?

Alternate Derived Minimums specify increments for NAVAIDs. What are the increments for 1 NAVAID and for 2 NAVAIDs?

• A. 1 NAVAID: Add 400 feet and 1 mile; 2 NAVAID: Add 200 feet and 1/2 mile to highest of each
• B. 1 NAVAID: Add 200 feet and 1/2 mile; 2 NAVAID: Add 400 feet and 1 mile to highest of each
• C. 1 NAVAID: Add 500 feet and 2 miles; 2 NAVAID: Add 250 feet and 3/4 mile
• D. 1 NAVAID: Add 300 feet and 1 mile; 2 NAVAID: Add 100 feet and 1/4 mile

Answer: (A)

Alternate Derived Minimums use increments based on how many NAVAIDs are used to define the approach. When the approach uses a single NAVAID, you increase the published minimum altitude by 400 feet and the minimum visibility by 1 mile. If two NAVAIDs are used, you increase the higher altitude minimum by 200 feet and the higher visibility minimum by 0.5 mile. In practice, you take the highest published altitude minimum and the highest published visibility minimum from the NAVAIDs involved, then apply these increments to those values to get the alternate minimums. So, the increments are: one NAVAID → +400 feet and +1 mile; two NAVAIDs → +200 feet and +1/2 mile.

Alternate Derived Minimums use increments based on how many NAVAIDs are used to define the approach. When the approach uses a single NAVAID, you increase the published minimum altitude by 400 feet and the minimum visibility by 1 mile. If two NAVAIDs are used, you increase the higher altitude minimum by 200 feet and the higher visibility minimum by 0.5 mile. In practice, you take the highest published altitude minimum and the highest published visibility minimum from the NAVAIDs involved, then apply these increments to those values to get the alternate minimums.

So, the increments are: one NAVAID → +400 feet and +1 mile; two NAVAIDs → +200 feet and +1/2 mile.