Passenger ships are generally used to carry passengers' vehicles and small quantities of goods. The basic characteristics of passenger ships are as follows: the superstructure is developed and used for arranging passenger compartments; The safety requirements for anti-sinking, fire prevention and lifesaving are relatively strict; The comfort requirements for roll reduction, shock absorption and sound insulation are high; Fast speed and large power reserve. The vast majority of passenger ships are scheduled to sail, which is also called liner.