In addition to carrying Ro-Ro cargo,Ro-Ro ships are also commonly used for loading containers on deck.By comparing the container loading arrangements and securing systems of two types of Ro-Ro ships,this study investigates the cargo hold arrangement,container loading locations,container loading and unloading methods,and container securing systems on the Ro-Ro ships,which also summarizes the factors that need to be considered in the design of container securing systems for Ro-Ro ships,and provides suggestions for increasing the number of containers loaded,improving cargo hold utilization,and reducing container securing operations,providing reference for the design of container securing systems for Ro-Ro ships.