How does a hover craft stop?
by reducing engine rpm, this will reduce the air cushion height
and increase drag between the skirt and surface, which will slow
and stop the hovercraft. Alternatively, the hovercraft can be
turned around 180 degrees and the engine can be accelerated until
it stops. In an emergency situation, while on most surfaces,
turning the engine off will stop the hovercraft immediately. I hope
this has been helpful :)