It was used for deploying the CIS attack vehicles into battle. Because of the lack of weapons, they were easy targets for LAAT/i gunships. Each one had a pair of folding wings that would fold down when landing.
VACs were known to be used in the First and Second Battles of Rhen Var, the Conquest of Raxus Prime, and the Battle of Thule. They were used in these battles to quickly deposit Heavy Artillery Guns, Armored Assault Tanks, and other CIS vehicles. They even used their lifts to carry enemy vehicles and destroy them.