I'm a doctor, not a mechanic
Legacy:HoverPathNode
From Unreal Wiki, The Unreal Engine Documentation Site
A special pathnode for flying (think "Raptor") and hovering (think "Manta") vehicles. Unlike RoadPathNodes a HoverPathNode can be placed over water as well.
If you want a pathnode that can only be used by flying vehicles, but not by hovercrafts, use a FlyingPathNode instead.