Landing Craft, Air Cushion. An amphibious vehicle used to transport, ship-to-shore and across the beach, personnel, weapons, equipment, and cargo of the assault elements of the Marine Air Ground Task Force. A principal United States Marine Corps organization that combines air-, land-, and sea-borne forces to conduct a wide array of military operations and humanitarian responses anywhere in the world. Comprised of a CE, ACE, GCE, and LCE. May take the form of a MEB, MEF, or MEU..