Correct. There's a little more to it than that, though.
You must
allow the vehicle to accelerate until the driven wheels rotate freely; directly between slippage and overrun. Once that speed has been reached, it is imperative to remain in the gear in which you mean to pass beyond the descent onto a level surface.
Some distance will be required to reach the appropriate descent speed. Even more distance will be required to slow the vehicle to a stop. This is why you can't do it in a populated area. You may have the room to accomplish the action, but any unexpected interference may place others or their property at risk.
Snow tires, and/or studs are the answer. I personally have never used chains, but I suspect the result would be similar. Once physical traction aids are employed, the vehicle can be slowed earlier, without further increases in speed.
You can freely manipulate a car on an empty stage, as you've got the whole road to use, and no bystanders. Even racing cars are equipped with studded tires when conditions warrant them.
If these tires weren't fitted, winter rally stages would be very short, slow events.:rofl:
Skill only takes you so far. Beyond a certain point, one must bribe the laws of physics.
Cheers,
Kennith