LARC-LX or as it was originally designated BARC (Barge, Amphibious Resupply, Cargo) is a welded steel

Steel

Steel is an alloy that consists mostly of iron and has a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most common alloying material for iron, but various other alloying elements are used, such as manganese, chromium, vanadium, and tungsten...

 hulled amphibious cargo vehicle

Amphibious vehicle

An amphibious vehicle , is a vehicle or craft, that is a means of transport, viable on land as well as on water – just like an amphibian....

. 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 265 hp GMC diesel engine

Diesel engine

A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...

s 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 1.2 meter diameter propellers, which propelled the vehicle in the water.