Weather balloons aren’t piloted. I don’t think it had any control planes at all, beyond just floating along atmospheric currents. At best they can control elevation? Ok, googling a bit:
> Is it possible to steer or otherwise control a typical high-altitude balloon?
It can be controlled, but let me be careful about what I mean by that. Balloons go with the wind. And so the only control that a balloon has is: in some balloons, you can control the altitude—you can make it go higher or lower. To the extent that the wind speed and direction varies with altitude, you can change the altitude, within some limits. And that can give you some measure of control—but not anywhere near the level of control that you have [with an airplane]. You can’t turn around and go the other direction; you can never go upwind in the balloon. You’re always going to be moving with the atmosphere that surrounds it.
