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A Landing Craft Air Cushion (LCAC) makes its way across San Francisco Bay during the 2005 San Francisco Fleet Week Parade of Ships. The LCAC is a class of air-cushion vehicle (hovercraft) used as landing craft by the United States Navy's Assault Craft Units to transport weapons systems, equipment, cargo and personnel of the assault elements of the Marine Air/Ground Task Force both from ship to shore and across the beach.