So this is a new one for me, maybe not for a bunch of you, but it got me thinking. Coming home from Maine this morning (No vacation, helping a daughter move to a new apartment unfortunately) I was on a common frequency for a bunch of airports and strips on my route. Heard the usual, but annoying to me, anyone in the pattern please advise for a airport close by. Then a few minutes later the same guy asking if so and so, by tail number was on frequency. The other plane responded and the first guy noted his position and asked the intentions of plane 2. saying he was several hundred feet above him. My first thought was he was so close he could read the tail number. Then several minutes later guy 1 asked the same question of another plane. It then dawned on me that he was picking up planes on his ADSB and questioning them on their flight path. He did it again a few minutes later with a helicopter. I switched to another frequency for a strip I was passing over and didn't switch back, so if he contacted anyone else I didn't hear it. All three pilots contacted were on frequency and responded politely, but is this common? The helicopter had already been giving position reports. It seemed kind of annoying to me. It sounded like the planes contacted were in level flight in-route to a destination and probably were not a safety threat. I can understand it for the occasional plane that looks like it may be on a close course to your flightpath, but I got the impression he was trying to make contact with anyone close by. To me it was just clogging up a already busy frequency. Am I missing anything? Any thoughts would be appreciated.
Pete


