White repulsor-craft seen in the background in Echo Base and the main hangar of Home One. These personnel carriers were enclosed on all sides, except the roof. They carried passengers and cargo around various Alliance installations.
During the evacuation of Echo Base, Rebel transport ships were loaded up with troop carriers such as these.
A hover sled brought the Rebel strike force to their shuttle before the Battle of Endor.
Rebel gun sled
A "gun sled" being worked on in Echo Base.
Each of these sleds were mounted with an anti-personnel cannon and used to protect the hangars of Echo Base.
Trivia
One of these units was briefly seen in the left corner of the screen when Han Solo rode into a hangar at the beginning of ESB. In addition, a cut-scene showed Luke Skywalker using a sled of this type to fight off Wampas.
The name is not official, as this vehicle has never been officially named.