Wikipedia
LARC-LX (Lighter, Amphibious Resupply, Cargo, 60 ton), or as it was originally designated BARC (Barge, Amphibious Resupply, Cargo) is a welded steel hulled amphibious cargo vehicle. It could carry up to 100 tons of cargo or 200 people, but a more typical load was 60 tons of cargo or 120 people. The vehicle was powered by four GMC diesel engines positioned in the sides of the hull, each of which drove one wheel on land. Pairs of engines were coupled to drive each of the two diameter propellers, which propelled the vehicle in the water. Its top speed was on land, or afloat. The operator occupied a small cab on the port side at the aft end of the vehicle.
The LARC-LX was used to transport wheeled and tracked vehicles, including beach preparation equipment and general cargo, from ship-to-shore or to inland transfer points. It was also capable of transporting shipping containers, which could be landed from the LARC either by crane, straddle carriers, or rollers. It was the only amphibious vehicle in U.S. Army service capable of landing on a beach through surf. Typically, the LARC-LX was carried as deck cargo on a commercial vessel or heavy lift ship to be transported overseas.