There are Two (2) main methods used for loading motor cargo.
RORO ships are vessels that are designed to carry wheeled cargo such as automobiles, trucks, semi-trailer trucks, trailers or railroad cars that are driven on and off the ship on their own wheels. RORO vessels come with in-built ramps which allow the cargo to be efficiently rolled on and rolled off the vessel when in port. When using RORO vessels to ship vehicles, the customers will be charged by cubic meters depending on the destination.
Container ships are cargo ships that carry their entire load in intermodal containers which is a technique also known as containerization. This method of shipment is one of the most common forms of commercial freight transportation. Shipping containers come in many different names, which can be a bit confusing.
However most shipping containers are standard in shape, size and construction virtually throughout the world.