Yup. There are different requirements depending on payload size, but if you’re doing it regularly even if you don’t have to, you send appropriate information a

Yup. There are different requirements depending on payload size, but if you’re doing it regularly even if you don’t have to, you send appropriate information anyway notifying the right people locally what is flying where, expected flight paths, descriptions, exact times, etc. We did a balloon launch a long time ago, it had a radio sending back telemetry and we chased it across Colorado scrub land hundreds of miles.