What does a back triangle with the letter 'A' inside mean on an approach plate?

What does a back triangle with the letter 'A' inside mean on an approach plate?

• A. Not available as alternate
• B. Alternate minimums are standard
• C. Alternate minimums apply only at night
• D. Nonstandard Alternate Minimums

Answer: (D)

That marking is a flag for nonstandard alternate minimums. On an IFR approach plate, the “A” inside a triangle signals that the published alternate minimums are not the usual defaults. You must check the plate’s notes or the dedicated Alternate Minimums section to find the exact values and any conditions that apply. This symbol doesn’t say anything about the approach minimums themselves or about night operations; it specifically tells you the alternate minimums are nonstandard and require consulting the chart for the correct figures to use when planning an alternate airport.

That marking is a flag for nonstandard alternate minimums. On an IFR approach plate, the “A” inside a triangle signals that the published alternate minimums are not the usual defaults. You must check the plate’s notes or the dedicated Alternate Minimums section to find the exact values and any conditions that apply. This symbol doesn’t say anything about the approach minimums themselves or about night operations; it specifically tells you the alternate minimums are nonstandard and require consulting the chart for the correct figures to use when planning an alternate airport.