A ThroneSled was a piece of Hynerian technology capable of holding the weight of a fully grown Hynerian (such as Rygel XVI) as well as another humanoid (for a short time).
It is a piece of tech that appeared to be used exclusively for Hynerian royals. The sled looked like a small chair without legs and typically hovered a foot above the ground, although the altitude could be adjusted. It was easy to maneuver, using a joystick, and could achieve enough speed to ram a person.