When you see balloon icons on a flight tracker like FlightRadar24 or FlightAware in 2026, they typically represent High-Altitude Balloons (HABs) or weather balloons. These are uncrewed vessels that ascend into the stratosphere, often reaching altitudes between 60,000 and 120,000 feet—far above commercial airline traffic. Most are launched by meteorological agencies to gather data on atmospheric pressure, temperature, and humidity. However, in 2026, many represent private or research projects, such as those by companies like World View or Space Perspective, which test equipment for near-space tourism or telecommunications. Some are "Super-Pressure" balloons designed to stay aloft for months at a time. They appear on trackers because they are equipped with ADS-B transponders, allowing Air Traffic Control and other aircraft to see their position for safety. In 2026, these icons have become more common as various nations deploy high-altitude "silent watchers" for climate monitoring and persistent surveillance in remote regions.