But sometimes, there is room for less important radio traffic, and that can be a good thing. Here's an example from a flight I took the other day. I was overflying a local airport that sits only a few miles from a second airport. The runways are aligned within 10 degrees of each other and they share the same Unicom frequency — and not one of the usual frequencies usually used for that role. As I maneuvered nearby both airports (better than 1,000 feet above pattern altitude), I heard two pilots at one of the fields discussing back taxiing and other routine communications, obviously within sight of each other. As one of them took off, I heard him call out his intentions to stay in the pattern. It sounded as though he was an instructor with a primary student practicing landings.