Originally Posted by
Mikec
If I remember right it is giving you a heads up that you will be flying over or by an airport with basically the same landing runway during your approach. For example; KJAN ILS Rwy 16. Just prior to the glide slope intercept you fly by Campbell airport with a runway 17 which is about 8 miles from KJAN. Just situation awareness.
That sounds logical though it would seem that the charting convention would be in the legend or something of the like.
Another example of what you describe is Flippin airport (KFLP) and Baxter County airport (KBPK) in Arkansas, but you can see how they handled it in this case on the profile and planview.
https://skyvector.com/files/tpp/1603/pdf/05406ILD5.PDF