Ro-ro vessels are the mainstream mode of transporting automobiles by sea, featuring multi-layered, enclosed car decks. Drivers maneuver vehicles onto the ship via the stern or side ramps, guiding them to park snugly in designated spaces. The crew then places wheel chocks and, for high-end vehicles, performs simple lashings. The entire process, like a large multi-story parking garage, is highly efficient, minimizes scratches, and enables the transoceanic transport of tens of thousands of vehicles.