Tethered balloon
（重定向自Tethered aerostat）
![Tethered balloons can carry instruments and
sensors for long durations that are impractical for other aircraft.](/Images/godic/202502/15/USGS_Blimp14740.jpg")
![The DHL Balloon manufactured by Aerophile is the world's largest tethered helium balloon with 30 passengers on board](/Images/godic/202502/15/The_DHL_Balloon_2,_Aug_064740.JPG")
![Tethered Aerostat Radar System (TARS) aerostat of the U.S. Army, used by Air Force, Marfa, TX](/Images/godic/202502/15/Marfatx24740.jpg")
![Tethered ballon from below](/Images/godic/202502/15/Projekt_Heißluftballon_-_Highflyer_-IMG-13994740.jpg")
A tethered, moored or captive balloon is a balloon that is restrained by one or more tethers attached to the ground and so cannot float freely. The base of the tether is wound around the drum of a winch, which may be fixed or mounted on a vehicle, and which is used to raise and lower the balloon.