RORO ship
Roll-on/roll-off ships are cargo ships designed to carry wheeled cargo, such as cars, trucks, semi-trailer trucks, buses, trailers, and railroad cars. RORO vessels have either built-in or shore-based ramps or ferry slips that allow the cargo to be efficiently rolled on and off the vessel when in port. While smaller ferries that operate across rivers and other short distances often have built-in ramps, the term RORO is generally reserved for large oceangoing vessels.
