Hot air balloons are horizontally stranded without wind
While a pilot can control a balloon's altitude to within a few inches, they are entirely at the mercy of shifting currents to move left or right.
A hot air balloon is essentially a giant bubble of buoyancy, staying aloft because its internal air is roughly half a kilogram per cubic meter lighter than the air outside. While this allows for precise vertical movement, horizontal travel is a game of atmospheric chess. Pilots must hunt for wind shear—distinct layers of air at different altitudes that blow in different directions. By ascending or descending into these specific streams, they can steer toward a target.
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