ADS-B has become a household word among pilots over the last decade, especially with the popularity of devices like the Sentry, Stratus, and Garmin GDL receivers. While ADS-B weather is fairly well understood, ADS-B traffic is more complicated and there has been a great deal of confusion about when and how pilots can view this traffic information. In this article, we’ll try to explain in plain English what ADS-B traffic is, how to get it, and what the limitations are.