I'm always fascinated by how little I know about the things I use every day. The ILS is one of those things. The ILS is the "bread and butter" of the instrument approaches. If there's a choice, most pilots and most controllers will go with the ILS. (Actually, most would prefer a visual approach, but that's a whole 'nother column.)Let's take a look at what the AIM says about an ILS:
This is a companion discussion topic for the original entry at https://www.avweb.com/features/say-again-58-atc-207-the-ils