Hovercraft

Hovercraft are aerial vehicles appearing in BioShock Infinite. Prior to release of the game, they were seen multiple times in various preview trailers, used by both the Vox Populi and The Founders as troop carriers.

Types of hovercraft
There are numerous types of hovercraft, all utilizing the same unknown technology to provide flight and locomotion.

Gunship
Gunships are utilized by both the Founders and the Vox Populi to transport their soldiers, and occasionally provide fire support through an onboard Gun Automaton or a multiple rocket launcher mounted on the underside of the hull. With the exception of the rocket-firing variant, gunships are virtually immune to small arms fire and explosions, and can only be destroyed by Songbird.

Cargo Barge
Cargo Barges can be seen throughout Finkton. They appear to be powered by two thrusters and are usually much larger than the gunships used by the Founders and the Vox Populi. They are primarily used for cargo transport around Beggar's Wharf.

Other variants

 * A hovercraft is used as a mobile stage by a Barbershop Quartet during the annual Columbian Raffle and Fair.
 * Another hovercraft is docked near the park where the raffle takes place. Though the profusion of firework launchers and various supply crates on the deck seem to identify it to be a cargo vessel, there is a Gun Automaton located at the bow.
 * Later on, a gunship can be seen evacuating Founder citizens from Emporia.