What action can you take if a military base is listed as PPR in the IFR Enroute Supplement?

When a military base is designated as PPR (Prior Permission Required) in the IFR Enroute Supplement, it indicates that the pilot must obtain prior approval before using that facility. This designation is primarily for operational and security reasons.

Listing a PPR facility as an alternate is permissible, provided that you have received the required permission ahead of time. It is essential for the pilot to ensure that they have obtained the necessary clearance to land at that base for operational planning and safety purposes.

Understanding that a PPR airfield can serve as an alternate airport allows pilots to incorporate flexibility into their flight plans while still adhering to the regulations and requirements set by military facilities. It’s crucial to note, however, that approval is a prerequisite for usage, reinforcing adherence to the specific protocols associated with military installations.