The index has been set both on the first page with the list of the various airfield and on the second page with the map.
I have also added an "Index" button below all the cards, which quickly takes you back to the first page.
To maintain high image quality, I had to apply an AI-based Upscale to all the charts, so it is possible that some texts (especially smaller ones) might appear slightly distorted.
Caucasus NIGHT version: https://www.digitalcombatsimulator.com/en/files/3342819/