Ro-Ro ship refers to a "ship" that loads and unloads cargo vehicles by means of ro-ro through a springboard. The concept of a ro-ro ship originated from a military tank or car
landing craft. There are openings on both sides and stern of the ship, and there are a total of 5 gangplanks for vehicles to get on and off the ship, and since then the Ro-Ro ship has developed rapidly.
It is now prevalent in the Nordic countries.