If an FAA approach plate has an “A” icon in its notes section, this means the airport has non-standard IFR alternate minimums published in the US Terminal Procedures Publication (TPP).
Approach plate notes section showing the 'A' icon
To view the non-standard IFR alternate minimums published for a particular airport in ForeFlight Mobile:
- In the Airports view, tap Procedures.
- On the Procedures tab, tap Arrival and look for an appropriate plate.
- If there is an entry, tap on it and swipe through the pages until you find the airport in question.
Locating alternate IFR minimums
Alternate IFR minimums page